zigcc: undefined symbol: __isoc23_* when combining Janet and Raylib libraries

[greenfork]

Zig Version

0.11.0 and 0.12.0-dev.1814+5c0d58b71

Steps to Reproduce and Observed Behavior

Here is a repository with reproduction steps and an error message: https://github.com/greenfork/isoc23.

Here they are verbatim:

$ git clone https://github.com/greenfork/isoc23.git
$ cd isoc23

# Wait a bit because this command downloads a large Raylib repository!
$ git submodule update --init --recursive jaylib

# Add janet.h to the hardcoded in jaylib include path (remember to delete it afterwords)
$ sudo mkdir /usr/local/include/janet
$ sudo cp src/janet.h /usr/local/include/janet/

$ zig version
0.11.0
$ zig build # works fine
$ zig build -Dtarget=x86_64-linux-gnu # fails

zig build-exe isoc23 Debug x86_64-linux-gnu: error: the following command failed with 3 compilation errors:
/home/grfork/zig-linux-x86_64-0.11.0/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /tmp/isoc23/src/thehouse_hello_world.c /tmp/isoc23/src/janet.c /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a -lGL -lX11 /tmp/isoc23/zig-cache/o/75663b2f53ebaf3a2586f24809272912/libjaylib.a -lc --cache-dir /tmp/isoc23/zig-cache --global-cache-dir /home/grfork/.cache/zig --name isoc23 -target x86_64-linux-gnu -mcpu x86_64 -I /tmp/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-gnu 3 errors
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /tmp/isoc23/zig-cache/o/1dfae6069d01d348c4482230698d5016/rglfw.o:(_glfwParseUriList) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by context.c:408 (jaylib/raylib/src/external/glfw/src/context.c:408)
    note:               /tmp/isoc23/zig-cache/o/1dfae6069d01d348c4482230698d5016/rglfw.o:(_glfwRefreshContextAttribs) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
    note: referenced by tinyobj_loader_c.h:792 (jaylib/raylib/src/external/tinyobj_loader_c.h:792)
    note:               /tmp/isoc23/zig-cache/o/7fbd155baba90ba2941e259d327944c1/rmodels.o:(tinyobj_parse_and_index_mtl_file) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
    note: referenced by glad.h:8550 (jaylib/raylib/src/external/glad.h:8550)
    note:               /tmp/isoc23/zig-cache/o/c8be532591c10fa8971ba04591cac7e4/rcore.o:(glad_gl_find_core_gl) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /tmp/isoc23/zig-cache/o/1dfae6069d01d348c4482230698d5016/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /tmp/isoc23/zig-cache/o/1dfae6069d01d348c4482230698d5016/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /tmp/isoc23/zig-cache/o/1dfae6069d01d348c4482230698d5016/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a488295558bcebe973d5d2fd0f35b729/libraylib.a

$ zig version # same on master
0.12.0-dev.1814+5c0d58b71
$ zig build -Dtarget=x86_64-linux-gnu # fails

$ sudo rm -r /usr/local/include/janet

Expected Behavior

The project compiles with any target specified.

About the project, it uses Zig to compile a C project:

• Janet language with amalgamation build src/janet.c and src/janet.h
• Raylib using its build.zig in jaylib/raylib/src/build.zig maintained independently from me
• Jaylib wrapper around Raylib for Janet in jaylib/build.zig that I wrote

There are two issues I found, probably related:

• compiler-rt: sanitizers do not intercept __isoc23_* functions added in Glibc-2.38 llvm/llvm-project#64388
• zig c++ link error when targetting older glibc #17536

And also an explanation about the #define _GNU_SOURCE which is present in janet.c: openssl/openssl#22833

[rootbeer]

Yeah, there are some open glibc linking issues with Zig. I thought the current git builds had fixes for these string problems (I could definitely see there being additional problems, too, though). You might try targeting an older version of glibc with:

$ zig build -Dtarget=x86_64-linux-gnu.2.17

and see if that fixes (or changes) the problem. (Generally versions after 2.17 should work.)

Or you might target the musl C library (-Dtarget=x86_64-linux-musl).

Or, try building on a host with an older version of glibc. I assume your host has v2.38? (ldd --version should tell us).

[greenfork]

For gnu.2.17 I get the same problem:

> zig build -Dtarget=x86_64-linux-gnu.2.17
zig build-exe isoc23 Debug x86_64-linux-gnu.2.17: error: the following command failed with 3 compilation errors:
/home/grfork/zig-linux-x86_64-0.11.0/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /tmp/isoc23/src/thehouse_hello_world.c /tmp/isoc23/src/janet.c /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a -lGL -lX11 /tmp/isoc23/zig-cache/o/362e7f9a9f49ae84d0e5e54a4c9dcd6c/libjaylib.a -lc --cache-dir /tmp/isoc23/zig-cache --global-cache-dir /home/grfork/.cache/zig --name isoc23 -target x86_64-linux-gnu.2.17 -mcpu x86_64 -I /tmp/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-gnu.2.17 3 errors
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /tmp/isoc23/zig-cache/o/5b408fbf747687143d52eebf24e0be38/rglfw.o:(_glfwParseUriList) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /tmp/isoc23/zig-cache/o/ba450d3731715ba9dc05b2e55bdd8ac7/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /tmp/isoc23/zig-cache/o/ba450d3731715ba9dc05b2e55bdd8ac7/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
    note: referenced by rtext.c:2065 (jaylib/raylib/src/rtext.c:2065)
    note:               /tmp/isoc23/zig-cache/o/ba450d3731715ba9dc05b2e55bdd8ac7/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /tmp/isoc23/zig-cache/o/5b408fbf747687143d52eebf24e0be38/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /tmp/isoc23/zig-cache/o/5b408fbf747687143d52eebf24e0be38/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /tmp/isoc23/zig-cache/o/5b408fbf747687143d52eebf24e0be38/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/362d4a10b5370f9ced79956931d943a5/libraylib.a

For trying to build for musl there are also errors about __fcntl_time64:

> zig build -Dtarget=x86_64-linux-musl
zig build-exe isoc23 Debug x86_64-linux-musl: error: the following command failed with 4 compilation errors:
/home/grfork/zig-linux-x86_64-0.11.0/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /tmp/isoc23/src/thehouse_hello_world.c /tmp/isoc23/src/janet.c /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a -lGL -lX11 /tmp/isoc23/zig-cache/o/2cdb71e53ec7e9728b5841e58e052205/libjaylib.a -lc --cache-dir /tmp/isoc23/zig-cache --global-cache-dir /home/grfork/.cache/zig --name isoc23 -target x86_64-linux-musl -mcpu x86_64 -I /tmp/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-musl 4 errors
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /tmp/isoc23/zig-cache/o/3e33ea2af0d29fe68e4b06f989f11b92/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /tmp/isoc23/zig-cache/o/3e33ea2af0d29fe68e4b06f989f11b92/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by rtext.c:2065 (jaylib/raylib/src/rtext.c:2065)
    note:               /tmp/isoc23/zig-cache/o/3e33ea2af0d29fe68e4b06f989f11b92/rtext.o:(LoadBMFont) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(_glfwParseUriList) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(parseMapping) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
error: ld.lld: undefined symbol: __fcntl_time64
    note: referenced by x11_init.c:1062 (jaylib/raylib/src/external/glfw/src/x11_init.c:1062)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(createEmptyEventPipe) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by x11_init.c:1063 (jaylib/raylib/src/external/glfw/src/x11_init.c:1063)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(createEmptyEventPipe) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced by x11_init.c:1066 (jaylib/raylib/src/external/glfw/src/x11_init.c:1066)
    note:               /tmp/isoc23/zig-cache/o/f86f9d76b7e3fa058445e48b766e2efc/rglfw.o:(createEmptyEventPipe) in archive /tmp/isoc23/zig-cache/o/a91aa86e920a35f68abd85864d4e40aa/libraylib.a
    note: referenced 1 more times

My version is 2.38, right, I'm on Arch Linux. I'm not sure I know how to build with an older version of glibc. But I suppose it could be irrelevant, my final goal is to compile a Linux build and a Windows build. For Windows I get different errors, probably will need to address them later:

> zig build -Dtarget=x86_64-windows-gnu
zig build-exe isoc23 Debug x86_64-windows-gnu: error: the following command failed with 25 compilation errors:
/home/grfork/zig-linux-x86_64-0.11.0/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /tmp/isoc23/src/thehouse_hello_world.c /tmp/isoc23/src/janet.c /tmp/isoc23/zig-cache/o/01b47b3de8dffbcbbffbde810e4032d6/raylib.lib -lwinmm -lgdi32 -lopengl32 /tmp/isoc23/zig-cache/o/8ae7461216cb1fbf15cf226190b39c25/jaylib.lib -lc --cache-dir /tmp/isoc23/zig-cache --global-cache-dir /home/grfork/.cache/zig --name isoc23 -target x86_64-windows-gnu -mcpu x86_64 -I /tmp/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-windows-gnu 25 errors
error: lld-link: undefined symbol: EnumProcessModules
    note: referenced by /tmp/isoc23/src/core/util.c:1064
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(symbol_clib)
error: lld-link: undefined symbol: __declspec(dllimport) closesocket
    note: referenced by /tmp/isoc23/src/core/ev.c:334
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_stream_close_impl)
    note: referenced by /tmp/isoc23/src/core/net.c:537
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
    note: referenced by /tmp/isoc23/src/core/net.c:571
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
    note: referenced 3 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSARecvFrom
    note: referenced by /tmp/isoc23/src/core/ev.c:2216
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(ev_callback_read)
error: lld-link: undefined symbol: __declspec(dllimport) WSAGetLastError
    note: referenced by /tmp/isoc23/src/core/ev.c:2218
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(ev_callback_read)
    note: referenced by /tmp/isoc23/src/core/ev.c:2467
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(ev_callback_write)
    note: referenced by /tmp/isoc23/src/core/net.c:259
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(net_sched_accept_impl)
    note: referenced 1 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSASendTo
    note: referenced by /tmp/isoc23/src/core/ev.c:2465
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(ev_callback_write)
error: lld-link: undefined symbol: __declspec(dllimport) getsockopt
    note: referenced by /tmp/isoc23/src/core/net.c:142
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(net_callback_connect)
error: lld-link: undefined symbol: __declspec(dllimport) setsockopt
    note: referenced by /tmp/isoc23/src/core/net.c:205
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(net_callback_accept)
    note: referenced by /tmp/isoc23/src/core/net.c:584
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(serverify_socket)
    note: referenced by /tmp/isoc23/src/core/net.c:937
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_stream_flush)
    note: referenced 2 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSASocketW
    note: referenced by /tmp/isoc23/src/core/net.c:250
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(net_sched_accept_impl)
    note: referenced by /tmp/isoc23/src/core/net.c:505
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
    note: referenced by /tmp/isoc23/src/core/net.c:685
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: AcceptEx
    note: referenced by /tmp/isoc23/src/core/net.c:258
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(net_sched_accept_impl)
error: lld-link: undefined symbol: __declspec(dllimport) freeaddrinfo
    note: referenced by /tmp/isoc23/src/core/net.c:427
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_sockaddr)
    note: referenced by /tmp/isoc23/src/core/net.c:436
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_sockaddr)
    note: referenced by /tmp/isoc23/src/core/net.c:469
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
    note: referenced 8 more times
error: lld-link: undefined symbol: __declspec(dllimport) getaddrinfo
    note: referenced by /tmp/isoc23/src/core/net.c:382
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_get_addrinfo)
    note: referenced by /tmp/isoc23/src/core/net.c:478
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: gai_strerrorA
    note: referenced by /tmp/isoc23/src/core/net.c:384
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_get_addrinfo)
    note: referenced by /tmp/isoc23/src/core/net.c:481
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: __declspec(dllimport) bind
    note: referenced by /tmp/isoc23/src/core/net.c:528
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
    note: referenced by /tmp/isoc23/src/core/net.c:696
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: __declspec(dllimport) WSAConnect
    note: referenced by /tmp/isoc23/src/core/net.c:552
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: __declspec(dllimport) ioctlsocket
    note: referenced by /tmp/isoc23/src/core/net.c:100
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_net_socknoblock)
error: lld-link: undefined symbol: __declspec(dllimport) shutdown
    note: referenced by /tmp/isoc23/src/core/net.c:632
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_shutdown)
error: lld-link: undefined symbol: __declspec(dllimport) listen
    note: referenced by /tmp/isoc23/src/core/net.c:713
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: __declspec(dllimport) getsockname
    note: referenced by /tmp/isoc23/src/core/net.c:783
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_getsockname)
error: lld-link: undefined symbol: __declspec(dllimport) inet_ntop
    note: referenced by /tmp/isoc23/src/core/net.c:743
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_so_getname)
    note: referenced by /tmp/isoc23/src/core/net.c:751
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_so_getname)
error: lld-link: undefined symbol: __declspec(dllimport) ntohs
    note: referenced by /tmp/isoc23/src/core/net.c:746
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_so_getname)
    note: referenced by /tmp/isoc23/src/core/net.c:754
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_so_getname)
error: lld-link: undefined symbol: __declspec(dllimport) getpeername
    note: referenced by /tmp/isoc23/src/core/net.c:799
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_getpeername)
error: lld-link: undefined symbol: __declspec(dllimport) htonl
    note: referenced by /tmp/isoc23/src/core/net.c:1012
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_setsockopt)
error: lld-link: undefined symbol: __declspec(dllimport) inet_pton
    note: referenced by /tmp/isoc23/src/core/net.c:1013
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_setsockopt)
    note: referenced by /tmp/isoc23/src/core/net.c:1019
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(cfun_net_setsockopt)
error: lld-link: undefined symbol: __declspec(dllimport) WSAStartup
    note: referenced by /tmp/isoc23/src/core/net.c:1083
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_net_init)
error: lld-link: undefined symbol: __declspec(dllimport) WSACleanup
    note: referenced by /tmp/isoc23/src/core/net.c:1089
    note:               /tmp/isoc23/zig-cache/o/220133fce5ed69adb057312814801181/janet.obj:(janet_net_deinit)

[rootbeer]

Can you try with a recent Zig build? I'm pretty sure there are fixes (like #17489) that are not in v0.11.0.

That said, the fact that you're seeing __isoc23_sscanf when linking with Musl is a bit disconcerting. As far as I understand it, that symbol is only part of glibc, and not something that should be defined when using Musl header files. I wonder if your build is pulling in host header files, instead of using the Zig-supplied ones for the target C library?

[greenfork]

I have tried it with the current master version of zig 0.12.0-dev.1834+f36ac227b.

-Dtarget=x86_64-linux-gnu -- same errors

> /home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build -Dtarget=x86_64-linux-gnu
zig build-exe isoc23 Debug x86_64-linux-gnu: error: the following command failed with 3 compilation errors:
/home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /home/grfork/isoc23/src/thehouse_hello_world.c /home/grfork/isoc23/src/janet.c /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a -lGL -lX11 /home/grfork/isoc23/zig-cache/o/9900b8c8b78f756457df40f6e5ffeafa/libjaylib.a -lc --cache-dir /home/grfork/isoc23/zig-cache --global-cache-dir/home/grfork/.cache/zig --name isoc23 -target x86_64-linux-gnu -mcpu x86_64 -I /home/grfork/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-gnu 3 errors
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /home/grfork/isoc23/zig-cache/o/267d085b674df72a8bd4a90dfe8f1053/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /home/grfork/isoc23/zig-cache/o/267d085b674df72a8bd4a90dfe8f1053/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
    note: referenced by rtext.c:2065 (jaylib/raylib/src/rtext.c:2065)
    note:               /home/grfork/isoc23/zig-cache/o/267d085b674df72a8bd4a90dfe8f1053/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /home/grfork/isoc23/zig-cache/o/4410aab7831af50d9cdd309ba5b2f7ab/rglfw.o:(_glfwParseUriList) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /home/grfork/isoc23/zig-cache/o/4410aab7831af50d9cdd309ba5b2f7ab/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /home/grfork/isoc23/zig-cache/o/4410aab7831af50d9cdd309ba5b2f7ab/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /home/grfork/isoc23/zig-cache/o/4410aab7831af50d9cdd309ba5b2f7ab/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/96a26e9b4afa7be3b3878ebd368adad6/libraylib.a

-Dtarget=x86_64-linux-gnu.2.17 -- same errors

> /home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build -Dtarget=x86_64-linux-gnu.2.17
zig build-exe isoc23 Debug x86_64-linux-gnu.2.17: error: the following command failed with 3 compilation errors:
/home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /home/grfork/isoc23/src/thehouse_hello_world.c /home/grfork/isoc23/src/janet.c /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a -lGL -lX11 /home/grfork/isoc23/zig-cache/o/91a9431b8b194a20b9057d98e2304064/libjaylib.a -lc --cache-dir /home/grfork/isoc23/zig-cache --global-cache-dir/home/grfork/.cache/zig --name isoc23 -target x86_64-linux-gnu.2.17 -mcpu x86_64 -I /home/grfork/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-gnu.2.17 3 errors
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /home/grfork/isoc23/zig-cache/o/c01a931d577101bf1085eefabfe41446/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
    note: referenced by glad.h:8550 (jaylib/raylib/src/external/glad.h:8550)
    note:               /home/grfork/isoc23/zig-cache/o/321df1d71e5c15b712ba0aa512942325/rcore.o:(glad_gl_find_core_gl) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /home/grfork/isoc23/zig-cache/o/c01a931d577101bf1085eefabfe41446/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /home/grfork/isoc23/zig-cache/o/16cafd61211e7e517e35db1a74de4db1/rglfw.o:(_glfwParseUriList) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /home/grfork/isoc23/zig-cache/o/16cafd61211e7e517e35db1a74de4db1/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /home/grfork/isoc23/zig-cache/o/16cafd61211e7e517e35db1a74de4db1/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /home/grfork/isoc23/zig-cache/o/16cafd61211e7e517e35db1a74de4db1/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/7b872f088ac22123b7df03790f3bfa46/libraylib.a

-Dtarget=x86_64-linux-musl -- same errors

> /home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build -Dtarget=x86_64-linux-musl
zig build-exe isoc23 Debug x86_64-linux-musl: error: the following command failed with 4 compilation errors:
/home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /home/grfork/isoc23/src/thehouse_hello_world.c /home/grfork/isoc23/src/janet.c /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a -lGL -lX11 /home/grfork/isoc23/zig-cache/o/9576605e160080c172e7aa306472c539/libjaylib.a -lc --cache-dir /home/grfork/isoc23/zig-cache --global-cache-dir/home/grfork/.cache/zig --name isoc23 -target x86_64-linux-musl -mcpu x86_64 -I /home/grfork/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-linux-musl 4 errors
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /home/grfork/isoc23/zig-cache/o/5e29ef2ba21f847ccf09ee9bf1711a77/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /home/grfork/isoc23/zig-cache/o/5e29ef2ba21f847ccf09ee9bf1711a77/rtext.o:(LoadBMFont) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by glad.h:8550 (jaylib/raylib/src/external/glad.h:8550)
    note:               /home/grfork/isoc23/zig-cache/o/13355226dee1fea36d0c205b6d4bf785/rcore.o:(glad_gl_find_core_gl) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(_glfwParseUriList) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(parseMapping) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
error: ld.lld: undefined symbol: __fcntl_time64
    note: referenced by x11_init.c:1062 (jaylib/raylib/src/external/glfw/src/x11_init.c:1062)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(createEmptyEventPipe) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by x11_init.c:1063 (jaylib/raylib/src/external/glfw/src/x11_init.c:1063)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(createEmptyEventPipe) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced by x11_init.c:1066 (jaylib/raylib/src/external/glfw/src/x11_init.c:1066)
    note:               /home/grfork/isoc23/zig-cache/o/1f48bd8432033430d990de7a3d951f64/rglfw.o:(createEmptyEventPipe) in archive /home/grfork/isoc23/zig-cache/o/9d6cbd4497b2a314170cb0c9508249c2/libraylib.a
    note: referenced 1 more times

-Dtarget=x86_64-windows-gnu -- same errors

> /home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build -Dtarget=x86_64-windows-gnu
zig build-exe isoc23 Debug x86_64-windows-gnu: error: the following command failed with 25 compilation errors:
/home/grfork/zig-linux-x86_64-0.12.0-dev.1834+f36ac227b/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /home/grfork/isoc23/src/thehouse_hello_world.c /home/grfork/isoc23/src/janet.c /home/grfork/isoc23/zig-cache/o/aba516e95e9f462530bbeed96990bd34/raylib.lib -lwinmm -lgdi32 -lopengl32 /home/grfork/isoc23/zig-cache/o/cab062f172b52656189ad5e0ac7381bf/jaylib.lib -lc --cache-dir /home/grfork/isoc23/zig-cache --global-cache-dir /home/grfork/.cache/zig --name isoc23 -target x86_64-windows-gnu -mcpu x86_64 -I /home/grfork/isoc23/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86_64-windows-gnu 25 errors
error: lld-link: undefined symbol: EnumProcessModules
    note: referenced by /home/grfork/isoc23/src/core/util.c:1064
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(symbol_clib)
error: lld-link: undefined symbol: __declspec(dllimport) closesocket
    note: referenced by /home/grfork/isoc23/src/core/ev.c:334
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_stream_close_impl)
    note: referenced by /home/grfork/isoc23/src/core/net.c:537
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
    note: referenced by /home/grfork/isoc23/src/core/net.c:571
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
    note: referenced 3 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSARecvFrom
    note: referenced by /home/grfork/isoc23/src/core/ev.c:2216
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(ev_callback_read)
error: lld-link: undefined symbol: __declspec(dllimport) WSAGetLastError
    note: referenced by /home/grfork/isoc23/src/core/ev.c:2218
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(ev_callback_read)
    note: referenced by /home/grfork/isoc23/src/core/ev.c:2467
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(ev_callback_write)
    note: referenced by /home/grfork/isoc23/src/core/net.c:259
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(net_sched_accept_impl)
    note: referenced 1 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSASendTo
    note: referenced by /home/grfork/isoc23/src/core/ev.c:2465
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(ev_callback_write)
error: lld-link: undefined symbol: __declspec(dllimport) getsockopt
    note: referenced by /home/grfork/isoc23/src/core/net.c:142
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(net_callback_connect)
error: lld-link: undefined symbol: __declspec(dllimport) setsockopt
    note: referenced by /home/grfork/isoc23/src/core/net.c:205
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(net_callback_accept)
    note: referenced by /home/grfork/isoc23/src/core/net.c:584
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(serverify_socket)
    note: referenced by /home/grfork/isoc23/src/core/net.c:937
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_stream_flush)
    note: referenced 2 more times
error: lld-link: undefined symbol: __declspec(dllimport) WSASocketW
    note: referenced by /home/grfork/isoc23/src/core/net.c:250
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(net_sched_accept_impl)
    note: referenced by /home/grfork/isoc23/src/core/net.c:505
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
    note: referenced by /home/grfork/isoc23/src/core/net.c:685
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: AcceptEx
    note: referenced by /home/grfork/isoc23/src/core/net.c:258
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(net_sched_accept_impl)
error: lld-link: undefined symbol: __declspec(dllimport) freeaddrinfo
    note: referenced by /home/grfork/isoc23/src/core/net.c:427
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_sockaddr)
    note: referenced by /home/grfork/isoc23/src/core/net.c:436
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_sockaddr)
    note: referenced by /home/grfork/isoc23/src/core/net.c:469
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
    note: referenced 8 more times
error: lld-link: undefined symbol: __declspec(dllimport) getaddrinfo
    note: referenced by /home/grfork/isoc23/src/core/net.c:382
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_get_addrinfo)
    note: referenced by /home/grfork/isoc23/src/core/net.c:478
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: gai_strerrorA
    note: referenced by /home/grfork/isoc23/src/core/net.c:384
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_get_addrinfo)
    note: referenced by /home/grfork/isoc23/src/core/net.c:481
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: __declspec(dllimport) bind
    note: referenced by /home/grfork/isoc23/src/core/net.c:528
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
    note: referenced by /home/grfork/isoc23/src/core/net.c:696
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: __declspec(dllimport) WSAConnect
    note: referenced by /home/grfork/isoc23/src/core/net.c:552
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_connect)
error: lld-link: undefined symbol: __declspec(dllimport) ioctlsocket
    note: referenced by /home/grfork/isoc23/src/core/net.c:100
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_net_socknoblock)
error: lld-link: undefined symbol: __declspec(dllimport) shutdown
    note: referenced by /home/grfork/isoc23/src/core/net.c:632
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_shutdown)
error: lld-link: undefined symbol: __declspec(dllimport) listen
    note: referenced by /home/grfork/isoc23/src/core/net.c:713
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_listen)
error: lld-link: undefined symbol: __declspec(dllimport) getsockname
    note: referenced by /home/grfork/isoc23/src/core/net.c:783
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_getsockname)
error: lld-link: undefined symbol: __declspec(dllimport) inet_ntop
    note: referenced by /home/grfork/isoc23/src/core/net.c:743
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_so_getname)
    note: referenced by /home/grfork/isoc23/src/core/net.c:751
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_so_getname)
error: lld-link: undefined symbol: __declspec(dllimport) ntohs
    note: referenced by /home/grfork/isoc23/src/core/net.c:746
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_so_getname)
    note: referenced by /home/grfork/isoc23/src/core/net.c:754
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_so_getname)
error: lld-link: undefined symbol: __declspec(dllimport) getpeername
    note: referenced by /home/grfork/isoc23/src/core/net.c:799
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_getpeername)
error: lld-link: undefined symbol: __declspec(dllimport) htonl
    note: referenced by /home/grfork/isoc23/src/core/net.c:1012
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_setsockopt)
error: lld-link: undefined symbol: __declspec(dllimport) inet_pton
    note: referenced by /home/grfork/isoc23/src/core/net.c:1013
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_setsockopt)
    note: referenced by /home/grfork/isoc23/src/core/net.c:1019
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(cfun_net_setsockopt)
error: lld-link: undefined symbol: __declspec(dllimport) WSAStartup
    note: referenced by /home/grfork/isoc23/src/core/net.c:1083
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_net_init)
error: lld-link: undefined symbol: __declspec(dllimport) WSACleanup
    note: referenced by /home/grfork/isoc23/src/core/net.c:1089
    note:               /home/grfork/isoc23/zig-cache/o/176379f4ab84e0233cc953a22d3fadfd/janet.obj:(janet_net_deinit)

[fabolous005]

I'm also running into this.
@greenfork were you able to resolve this?

[greenfork]

Nope

[illnyang]

compiler-rt's implicit dependency on newer glibc propagates right into your binaries. If you want to target older glibc you need to compile LLVM/Zig itself against older glibc.

[greenfork]

I don't specifically try to target older glibc, I just want to compile it.

[illnyang]

Let me put it this way: I had a similar issue when trying to run C++ program linked against older glibc and compiled with self-built LLVM toolchain (compiler-rt/libcxx/libcxxabi) that was built on a system with newer glibc. Once I recompiled LLVM toolchain on a system where host glibc version matched target glibc version, the issue has vanished.

[andrewrk]

compiler-rt's implicit dependency on newer glibc propagates right into your binaries. If you want to target older glibc you need to compile LLVM/Zig itself against older glibc.

This is not the case. With zig you pass the desired glibc version as part of the target.

[polarathene]

When you use -target native (default), Zig will have additional system search paths enabled.

• These are excluded when building for a different target than native (as can be seen via zig cc -target "<target here>" -print-search-dirs).
• You can add these back if they're compatible, but when Zig builds glibc for the alternative target, these added search paths have precedence and it'll use those headers while building it's libc. Should Zig do that? (this was also later observed in Feb 2025 at an issue that @greenfork referenced in their issue description, and perhaps elsewhere too)

Took me a while to troubleshoot it down to that from the given reproduction 😓 but this is exactly what was happening here; an -I /usr/include was being added via a build.zig source.

The source of the failure is from ./jaylib/raylib/src/build.zig, which has the following:

Collapsed for brevity

//...
.linux => {
    if (!options.platform_drm) {
        addCSourceFilesVersioned(raylib, &.{
            srcdir ++ "/rglfw.c",
        }, raylib_flags);
        raylib.linkSystemLibrary("GL");
        raylib.linkSystemLibrary("rt");
        raylib.linkSystemLibrary("dl");
        raylib.linkSystemLibrary("m");
        raylib.linkSystemLibrary("X11");
        raylib.addLibraryPath(.{ .path = "/usr/lib" });
        raylib.addIncludePath(.{ .path = "/usr/include" });

        raylib.defineCMacro("PLATFORM_DESKTOP", null);
    } else {
        raylib.linkSystemLibrary("GLESv2");
        raylib.linkSystemLibrary("EGL");
        raylib.linkSystemLibrary("drm");
        raylib.linkSystemLibrary("gbm");
        raylib.linkSystemLibrary("pthread");
        raylib.linkSystemLibrary("rt");
        raylib.linkSystemLibrary("m");
        raylib.linkSystemLibrary("dl");
        raylib.addIncludePath(.{ .path = "/usr/include/libdrm" });

        raylib.defineCMacro("PLATFORM_DRM", null);
        raylib.defineCMacro("GRAPHICS_API_OPENGL_ES2", null);
        raylib.defineCMacro("EGL_NO_X11", null);
        raylib.defineCMacro("DEFAULT_BATCH_BUFFER_ELEMENT", "2048");
    }
},

Specifically raylib.addIncludePath(.{ .path = "/usr/include" });.

The Zig cache (local/global) can also be in a bad state which can contribute to the problem (which is what was affecting me with this error while searching for a cause).

---

Minimal reproduction

You can easily reproduce the same failure with zig cc using this much simpler reproduction snippet

#include <stdlib.h>
int main(int argc, char* argv[]) {
	return strtoul(argv[1], 0, 10);
}

Reproduction environment via Fedora container:

# Setup reproduction:
docker run --rm -it --workdir /example fedora:42 bash
dnf install -yq uv python

cat <<HEREDOC > main.cpp
#include <stdlib.h>
int main(int argc, char* argv[]) {
	return strtoul(argv[1], 0, 10);
}
HEREDOC

NOTE: I'm using UV with the ziglang package, so just treat ziglang c++ and everything before it as effectively zig c++ ....

# Successful build due to no `/usr/include/stdlib.h` in the includes search path:
$ uvx --from ziglang==0.11.0 python -m ziglang c++ -target x86_64-linux-gnu.2.17 -o /dev/null -I/usr/include main.cpp

# This package provides `/usr/include/stdlib.h` which will now enable the build failure:
$ dnf install -yq glibc-devel

# Due to prior successful build of libc via Zig, you must clear the build cache to produce the failure:
$ rm -rf /root/.cache/zig


# Now Zig will fail:
$ uvx --from ziglang==0.11.0 python -m ziglang c++ -target x86_64-linux-gnu.2.17 -o /dev/null -I/usr/include main.cpp

In file included from main.cpp:1:
In file included from /usr/include/stdlib.h:26:
In file included from /usr/include/bits/libc-header-start.h:33:
/usr/include/features.h:516:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
#define __GLIBC_MINOR__ 41
        ^
<command line>:6:9: note: previous definition is here
#define __GLIBC_MINOR__ 17
        ^
LLD Link... 1 warning generated.
LLD Link... ld.lld: error: undefined symbol: __isoc23_strtoul
>>> referenced by main.cpp:3
>>>               /root/.cache/zig/o/91ee0cefaf90eda7e45bc693be5a9e27/main.o:(main)

Meanwhile with Zig 0.12.0 or newer, as glibc 2.38 is available as a target, that will satisfy the glibc symbol:

Collapsed for brevity

$ uvx --from ziglang==0.12.0 python -m ziglang c++ -target x86_64-linux-gnu.2.38 -o /dev/null -I/usr/include main.cpp

In file included from main.cpp:1:
In file included from /usr/include/stdlib.h:26:
In file included from /usr/include/bits/libc-header-start.h:33:
/usr/include/features.h:516:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
  516 | #define __GLIBC_MINOR__ 41
      |         ^
<command line>:7:9: note: previous definition is here
    7 | #define __GLIBC_MINOR__ 38
      |         ^
LLD Link... 1 warning generated.


# Anything lower will fail:
$ uvx --from ziglang==0.13.0 python -m ziglang c++ -target x86_64-linux-gnu.2.37 -o /dev/null -I/usr/include main.cpp

In file included from main.cpp:1:
In file included from /usr/include/stdlib.h:26:
In file included from /usr/include/bits/libc-header-start.h:33:
/usr/include/features.h:516:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
  516 | #define __GLIBC_MINOR__ 41
      |         ^
<command line>:7:9: note: previous definition is here
    7 | #define __GLIBC_MINOR__ 37
      |         ^
1 warning generated.
LLD Link... ld.lld: error: undefined symbol: __isoc23_strtoul
>>> referenced by main.cpp:3
>>>               /root/.cache/zig/o/8a529ec844f09490802b07d6edad7450/main.o:(main)

However from Zig 0.14.0 this slightly changes (-o /dev/null will raise warnings, but won't trigger an error), the failure still occurs if you aren't writing to -o /dev/null:

# Bails early without raising an error if `-o /dev/null` (Same with Zig `0.15.1`):
$ uvx --from ziglang==0.14.0 python -m ziglang c++ -target x86_64-linux-gnu.2.17 -o /dev/null -I/usr/include main.cpp

Installed 1 package in 974ms
In file included from main.cpp:1:
In file included from /usr/include/stdlib.h:26:
In file included from /usr/include/bits/libc-header-start.h:33:
/usr/include/features.h:516:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
  516 | #define __GLIBC_MINOR__ 41
      |         ^
<command line>:1:9: note: previous definition is here
    1 | #define __GLIBC_MINOR__ 17
      |         ^
1 warning generated.

$ uvx --from ziglang==0.15.1 python -m ziglang c++ -target x86_64-linux-gnu.2.37 -o example -I/usr/include main.cpp

In file included from main.cpp:1:
In file included from /usr/include/stdlib.h:26:
In file included from /usr/include/bits/libc-header-start.h:33:
/usr/include/features.h:516:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
  516 | #define __GLIBC_MINOR__ 41
      |         ^
<command line>:1:9: note: previous definition is here
    1 | #define __GLIBC_MINOR__ 37
      |         ^
1 warning generated.
ld.lld: error: undefined symbol: __isoc23_strtoul
>>> referenced by main.cpp:3
>>>               /root/.cache/zig/o/7f97acfc1f5420427737c8a16d05b150/main.o:(main)

---

Original response

This was all the effort I put in until realizing it was due to a -I /usr/include (due to all the inputs in source and link args, and unfamiliarity with zig build, was not easy to spot 😓)

FWIW: I landed here when looking into errors like undefined symbol: __isoc23_sscanf, but in my case it was due to clearing /root/.cache/zig/o (largest dir) and not the full zig global cache dir. That was preventing any zig compilation working (zig cc).

Collapsed for brevity

Below is for the benefit of anyone landing here. I've provided better instructions for a reproduction, but it's not too useful beyond that.

• Presumably something occurs with the search paths changing between -target native and another target, and when a static glibc library is available (like via glibc-devel package on Fedora), you can run into this failure.
• It's AFAIK conditional to something in one of the three build.zig (or related Cmake config for the .jaylib/raylib/ dep). Something I think adds a link to the system glibc as a result?

This is what glibc-devel package brings in on Fedora:

$ dnf repoquery -l glibc-devel | grep -E '\.(a|so)'

Updating and loading repositories:
Repositories loaded.
/usr/lib/libBrokenLocale.so
/usr/lib/libanl.a
/usr/lib/libanl.so
/usr/lib/libc.so
/usr/lib/libc_nonshared.a
/usr/lib/libdl.a
/usr/lib/libg.a
/usr/lib/libm.so
/usr/lib/libmcheck.a
/usr/lib/libpthread.a
/usr/lib/libresolv.so
/usr/lib/librt.a
/usr/lib/libthread_db.so
/usr/lib/libutil.a
/usr/lib64/libBrokenLocale.so
/usr/lib64/libanl.a
/usr/lib64/libanl.so
/usr/lib64/libc.so
/usr/lib64/libc_nonshared.a
/usr/lib64/libdl.a
/usr/lib64/libg.a
/usr/lib64/libm.so
/usr/lib64/libmcheck.a
/usr/lib64/libmvec.so
/usr/lib64/libpthread.a
/usr/lib64/libresolv.so
/usr/lib64/librt.a
/usr/lib64/libthread_db.so
/usr/lib64/libutil.a

I do know that when Zig builds on Fedora without -target native it only searches in /usr/lib, /usr/lib64 is ignored unless you add that explicitly. As shown at the end though, I'm not familiar with zig build to add that like I could via -L /usr/lib64 with zig cc.

UPDATE:

• raylib/src/build.zig does have raylib.addLibraryPath(.{ .path = "/usr/lib" }); (changing this to /usr/lib64 did not search /usr/lib64, /usr/lib was still the only location searched for target other than -target native
• The related include path /usr/include that was added next is the culprit.

---

# Add janet.h to the hardcoded in jaylib include path (remember to delete it afterwords)
$ sudo mkdir /usr/local/include/janet
$ sudo cp src/janet.h /usr/local/include/janet/

This seems to be more of a limitation of Zig if you're unable to provide additional search paths? 🤔

I'm not familiar with Zig enough myself, I've only really used zig cc (where you can rather easily leverage -I), I've seen that zig build has --search-prefix but perhaps that does not work in this case because jaylib/build.zig is separate? 🤷‍♂️

Reference: Hard-coded include path context:

$ grep -RF 'janet.h' src jaylib | sort -u

jaylib/src/main.c:#include <janet.h>
src/hello_world.c:#include <janet.h>
src/janet.c:#include "janet.h"
src/janet.c:#include <janet.h>
src/thehouse.c:#include <janet.h>
src/thehouse_hello_world.c:#include <janet.h>

$ grep -RF 'include/janet' src jaylib | sort -u
jaylib/build.zig:    lib.addSystemIncludePath(.{ .path = "/usr/local/include/janet" });

Alternatively, instead of providing the header at one of the searched include paths, since this is a submodule of your project, change your step to replace the path in the source instead:

# Use standard sed command to match and replace the text content:
sed -ir 's|"/usr/local/include/janet"|srcdir ++ "../../src"|' jaylib/build.zig

---

I have tried it with the current master version of zig 0.12.0-dev

0.12.0 had a regression introduced in it's development cycle that was fixed, so if you were affected with Zig 0.11.0 it's unlikely the same issue.

This is successful at building on Zig 0.11.0:

$ docker run --rm -it --workdir /example fedora:42 bash
$ dnf install -yq git-core uv python

$ git clone --depth 1 https://github.com/greenfork/isoc23 .
# Avoid permission errors to install submodule:
$ git config -f .gitmodules submodule.jaylib.url https://github.com/greenfork/jaylib
$ git submodule update --init --recursive --single-branch --depth 1

# Workaround as the `zig build` command apparently doesn't support adding additional include paths?:
$ sed -ir 's|"/usr/local/include/janet"|srcdir ++ "../../src"|' jaylib/build.zig

# Additional build dependencies required that weren't documented:
# Workaround: Installing `i686` packages instead of `x86_64` as `zig build` / `build-lib` is only searching `/usr/lib` and not `/usr/lib64` as Fedora expects.
$ dnf --setopt=install_weak_deps=0 install -yq libX11-devel.i686 libglvnd-devel.i686 libXcursor-devel.i686 libXrandr-devel.i686 libXinerama-devel.i686 libXi-devel.i686

# NOTE: Building with `x86` instead of `x86_64` (due to workaround cited above):
$ uvx --from ziglang==0.11.0 python -m ziglang build -Dtarget=x86-linux-gnu.2.17

Zig 0.12.0 or newer fails as breaking changes to the build.zig exists that need to be adapted, I'm not familiar enough with Zig to amend that:

$ uvx --from ziglang==0.12.0 python -m ziglang build -Dtarget=x86-linux-gnu.2.17

Installed 1 package in 1.17s
/example/jaylib/build.zig:8:14: error: root struct of file 'std' has no member named 'build'
    exe: *std.build.Step.Compile,
          ~~~^~~~~~
/root/.cache/uv/archive-v0/O8RaIuFjQSg_E1NLmdM5Q/lib/python3.13/site-packages/ziglang/lib/std/std.zig:1:1: note: struct declared here
pub const ArrayHashMap = array_hash_map.ArrayHashMap;
^~~
referenced by:
    build: /example/build.zig:18:11
    runBuild__anon_8994: /root/.cache/uv/archive-v0/O8RaIuFjQSg_E1NLmdM5Q/lib/python3.13/site-packages/ziglang/lib/std/Build.zig:2079:27
    remaining reference traces hidden; use '-freference-trace' to see all reference traces

I did reproduce your failure once glibc-devel package was installed (a dependency of the gcc package), this adds /usr/bin/cc which Zig will query to configure it's libc config (zig libc), adding extra search paths related to GCC.

$ dnf install -yq glibc-devel

# Due to previous build, clearing the build cache is required to reproduce the build error from change in environment:
# (NOTE: From Zig `0.13.0` the local cache dir became `.zig-cache/` instead of `zig-cache/`):
$ rm -rf zig-cache

$ uvx --from ziglang==0.11.0 python -m ziglang build -Dtarget=x86-linux-gnu.2.17

zig build-exe isoc23 Debug x86-linux-gnu.2.17: error: the following command failed with 3 compilation errors:
/root/.cache/uv/archive-v0/yyGo8mOMVE0ZmYNq3uRwk/lib/python3.13/site-packages/ziglang/zig build-exe -cflags -std=c99 -DJANET_BUILD_TYPE=release -- /example/src/thehouse_hello_world.c /example/src/janet.c /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a -lGL -lX11 /example/zig-cache/o/9ca0943b3eb94a457246d6a9d6e33e90/libjaylib.a -lc --cache-dir /example/zig-cache --global-cache-dir /root/.cache/zig --name isoc23 -target x86-linux-gnu.2.17 -mcpu pentium4 -I /example/src -L /usr/lib --listen=-
Build Summary: 3/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86-linux-gnu.2.17 3 errors
error: ld.lld: undefined symbol: __isoc23_sscanf
    note: referenced by tinyobj_loader_c.h:792 (jaylib/raylib/src/external/tinyobj_loader_c.h:792)
    note:               /example/zig-cache/o/ee5d38a860ad2d517374401c7553ba09/rmodels.o:(tinyobj_parse_and_index_mtl_file) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
    note: referenced by rtext.c:2051 (jaylib/raylib/src/rtext.c:2051)
    note:               /example/zig-cache/o/e58ae21837bd98e25da8c8d962ef1c12/rtext.o:(LoadBMFont) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
    note: referenced by rtext.c:2058 (jaylib/raylib/src/rtext.c:2058)
    note:               /example/zig-cache/o/e58ae21837bd98e25da8c8d962ef1c12/rtext.o:(LoadBMFont) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
    note: referenced 6 more times
error: ld.lld: undefined symbol: __isoc23_strtol
    note: referenced by init.c:213 (jaylib/raylib/src/external/glfw/src/init.c:213)
    note:               /example/zig-cache/o/d8091ce1ead2438c34cd7d00449760c6/rglfw.o:(_glfwParseUriList) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
error: ld.lld: undefined symbol: __isoc23_strtoul
    note: referenced by input.c:223 (jaylib/raylib/src/external/glfw/src/input.c:223)
    note:               /example/zig-cache/o/d8091ce1ead2438c34cd7d00449760c6/rglfw.o:(parseMapping) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
    note: referenced by input.c:224 (jaylib/raylib/src/external/glfw/src/input.c:224)
    note:               /example/zig-cache/o/d8091ce1ead2438c34cd7d00449760c6/rglfw.o:(parseMapping) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a
    note: referenced by input.c:228 (jaylib/raylib/src/external/glfw/src/input.c:228)
    note:               /example/zig-cache/o/d8091ce1ead2438c34cd7d00449760c6/rglfw.o:(parseMapping) in archive /example/zig-cache/o/a58e30f34b3eaf0b9ecc915bb733bac9/libraylib.a

Zig 0.11.0 only supported glibc up to 2.34, with Zig 0.12.0 supporting up to 2.38 (which contains that glibc symbol from your error). As you're on a dev system, it's also possible you have static glibc library available somewhere in the search paths.

The actual error though looks like it's coming from one of the projects being built (in ./jaylib/raylib/ there is a bunch of cmake files that I'm also not familiar enough to search through). Since both jaylib and raylib are built as static libs, presumably they are invoking a link to glibc / -static -lc, and the .a static lib is encountered first or enforced (more likely with -static?) that the system glibc static lib (2.38 or newer) will trigger that failure.

Why this doesn't happen on -target native would be due to change in search paths, and possibly also some additional logic by Zig?

• For example Zig has special handling for -l atomic where it will ignore this and satisfy it internally with static link, even if you had -Wl,-Bdynamic -l atomic -Wl,-Bstatic.
• zig libc -target native is the only one that queries cc executable (if GCC is installed for example), to discover additional search paths. Those might take precedence vs other targets given where these won't be visible by default.
• There's also some known issues about Zig's linker search paths having a mismatch from elsewhere when system paths are involved that can cause some issues:
  • System Libraries Passed Before Application Objects in Linker Args #24556 (comment)
  • fix(cc): move user provided -isystem paths to front of command #24353 (comment)
  • zig cc: detect -static and treat -l options as static library names #4986 (comment)

It's possible that it might have been resolved in a newer Zig release as well, there's been some fixes since, but this reproduction project is too much. Someone would need to provide a smaller reproduction to highlight the issue (unless it turns out to be one of the ones already reported elsewhere with much simpler reproductions).

There is also some regressions introduced AFAIK, such as since Zig 0.13.0, use of -L with a target other than -target native will prevent -l:<filename> syntax being able to use additional search paths.

---

zig build only searching /usr/lib for targets that aren't -target native

Attempting to build the jaylib package directly, it still fails to support customizing the search paths via zig build CLI / ENV? (that or I am inexperienced with the tooling to know how)

# Remove the installed i686 packages (used for workaround to satisfy `/usr/lib`):
$ dnf remove -yq libX11-devel libglvnd-devel libXcursor-devel libXrandr-devel libXinerama-devel libXi-devel

# Install the packages again, this time with the x86_64 (default) arch:
$ dnf --setopt=install_weak_deps=0 install -yq libX11-devel libglvnd-devel libXcursor-devel libXrandr-devel libXinerama-devel libXi-devel

# Change to the inner raylib dep and build it via it's own `build.zig`:
# NOTE: Adding the `--search-prefix` option was ineffective / ignored?
$ cd jaylib/raylib
$ uvx --from ziglang==0.11.0 python -m ziglang build -Dtarget=x86_64-linux-gnu.2.17 --search-prefix /usr/lib64

zig build-lib raylib Debug x86_64-linux-gnu.2.17: error: error: unable to find Dynamic system library 'GL' using strategy 'paths_first'. searched paths:
  /usr/lib/libGL.so
  /usr/lib/libGL.a

# The file exists however:
$ ls -1 /usr/lib64/libGL.so*
/usr/lib64/libGL.so
/usr/lib64/libGL.so.1.7.0

$ readlink -f /usr/lib64/
/usr/lib64/libGL.so.1.7.0

--search-prefix only seems to work when using the native target, similar to -L with -l:<filename> (-l <libname> continues to work) options with zig cc (UPDATE: -L not being compatible with -l:<filename> for targets other than -target native appears to be a regression introduced since Zig 0.14.0). I'm not exactly sure why that is though 😓

EDIT: --search-prefix is working alright. In one configuration I had the following with --sysroot /opt --search-prefix jaylib/raylib/raylib which translated to --sysroot /opt -I jaylib/raylib/raylib/include:

$ uvx --from ziglang==0.11.0 python -m ziglang build -Dtarget=x86-linux-gnu.2.17 --sysroot /opt --search-prefix jaylib/raylib/raylib
zig build-lib jaylib Debug x86-linux-gnu.2.17: error: error(compilation): clang failed with stderr: /example/jaylib/src/main.c:3:10: fatal error: 'janet.h' file not found


zig build-lib jaylib Debug x86-linux-gnu.2.17: error: the following command failed with 1 compilation errors:
/root/.cache/uv/archive-v0/yyGo8mOMVE0ZmYNq3uRwk/lib/python3.13/site-packages/ziglang/zig build-lib -cflags -std=c99 -DJANET_BUILD_TYPE=release -DJANET_ENTRY_NAME=janet_module_entry_jaylib -- /example/jaylib/src/main.c -lc --cache-dir /example/zig-cache --global-cache-dir /root/.cache/zig --name jaylib -static -target x86-linux-gnu.2.17 -mcpu pentium4 -iwithsysroot /example/jaylib/raylib/src -iwithsysroot /example/src --sysroot /opt -I jaylib/raylib/raylib/include --listen=-
Build Summary: 2/6 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install isoc23 transitive failure
   └─ zig build-exe isoc23 Debug x86-linux-gnu.2.17 transitive failure
      └─ zig build-lib jaylib Debug x86-linux-gnu.2.17 1 errors
/example/jaylib/src/main.c:1:1: error: unable to build C object: clang exited with code 1

So that's more related to zig build with build.zig search paths. The hard-coded /usr/local/include/janet/ search path in jaylib/build.zig could not use --search-prefix, but would append to the sysroot, thus for --sysroot /opt it would search for janet.h in /opt/usr/local/include/janet/.