musl-misc

musl C library miscellaneous

bits

• rpm/SPECS/musl-static.spec : centos/rhel 6 & 7 musl-libc static libs, headers and toolchain wrappers
• musl-cross-make-confs/Makefile.arch_indep : musl-cross-make Makefile driver for building a fully-static toolchain

links

• musl-libc : http://www.musl-libc.org/
• musl-cross-make : https://github.com/richfelker/musl-cross-make
• crosware, where this is used : https://github.com/ryanwoodsmall/crosware

docker dockerfiles/scripts/resources

• musl static lib rpm: https://github.com/ryanwoodsmall/dockerfiles/tree/master/centos-rpm-builds
• crosware static toolchain builder: https://github.com/ryanwoodsmall/dockerfiles/tree/master/crosware/statictoolchain
• docker container: https://hub.docker.com/r/ryanwoodsmall/crosware

todo

• XXX - move to either a .gz (everywhere) or an .xz (maybe not everywhere) archive
• XXX - 9cc 9.5.0 + musl 1.2.3 is the end of line for 9, need to figure out 10/11/12
• XXX - gcc 9.4 + musl 1.2.2 seems to break openssh+libressl
  • related to mallocng?
  • 1.2.0 and 1.2.1 w/--with-malloc=oldmalloc in MUSL_CONFIG seems to work
  • 1.2.2 doesn't want to build with --with-malloc=oldmalloc
• XXX - gcc 10 enables -fno-common by default, needs multiple workarounds
• XXX - gcc 10 conflicts with crosware binutils, libiberty or similar, need to figure out
• crank up default stack size? from habitat core/musl (default 80KB -> 2MB?):
  • sed -i 's/#define DEFAULT_STACK_SIZE .*/#define DEFAULT_STACK_SIZE 2097152/' src/internal/pthread_impl.h
• --enable-new-dtags - RUNPATH instead of RPATH
• need gnu patch, should test for it
• riscv64 kernel headers not included... need to fix (make general for non intel/arm)
• integrate off64_t/loff_t fixes for gccgo, etc.:
  • https://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg476845.html
  • http://gcc-patches.gcc.gnu.narkive.com/xkNPk6Vm/libgo-patch-committed-fill-out-syscall-package-for-gnu-linux
  • http://gcc.1065356.n8.nabble.com/libgo-patch-committed-Fill-out-syscall-package-for-GNU-Linux-td491220.html
  • -D_LARGEFILE_SOURCE and/or -D_LARGEFILE64_SOURCE? ${OSCFLAGS}
• split out ld.so patches into multiple arches?
• a fake sysroot is needed (perl and the like can use it)
• utmp/wtmp, i.e:

/usr/local/crosware/software/statictoolchain/current/x86_64-linux-musl/include/utmp.h:#define _PATH_UTMP "/dev/null/utmp"
/usr/local/crosware/software/statictoolchain/current/x86_64-linux-musl/include/utmp.h:#define _PATH_WTMP "/dev/null/wtmp"
/usr/local/crosware/software/statictoolchain/current/x86_64-linux-musl/include/paths.h:#define _PATH_UTMP       "/dev/null/utmp"
/usr/local/crosware/software/statictoolchain/current/x86_64-linux-musl/include/paths.h:#define _PATH_WTMP       "/dev/null/wtmp"

bootstrapping

• alpine works fine
  • see apk and bash/curl commands in comments
• crosware
  • need to be able to self-host
  • need a ${cwsw}/wget/current/bin/wget --no-check-certificate "${@}" wrapper
    • or try busybox wget and relax gnu check?
  • environment...
    • wget wrapper
    • crosware install statictoolchain git ; crosware update ; crosware install binutils slibtool ; . ${cwtop}/etc/profile

alpine options

--enable-checking=release
--disable-fixed-point
--disable-libstdcxx-pch
--disable-multilib
--disable-nls
--disable-werror
--disable-symvers
--enable-__cxa_atexit
--enable-default-pie
--enable-default-ssp
--enable-cloog-backend
--enable-languages=c,c++,d,objc,go,fortran,ada
--disable-libssp
--disable-libmpx
--disable-libmudflap
--disable-libsanitizer
--enable-shared
--enable-threads
--enable-tls
--with-system-zlib
--with-linker-hash-style=gnu

this doesn't work:::

OLD

• libtool? use slibtool
• errors ad infinitum
  • gmp (fixed)
  • mpfr (fixed)
  • mpc (fixed)
  • binutils (fixed)
• libtool -> slibtool symlink
• currently dies on compiling shared objects and/in C++ ABI issues
• this gets through a shared build:
  • LIBTOOL=slibtool CFLAGS=-fPIC CXXFLAGS=-fPIC LIBS="-L${cwsw}/binutils/current/lib/ -liberty" LDFLAGS="${LDFLAGS} -s --static" make -f ~/Makefile.arch_indep
  • but flakes out with c++/abi diffs again'
  • shared vs static vs host-shared?
  • tinkering with COMMON_CONFIG="--build=$(gcc -dumpmachine) --target=$(gcc -dumpmachine) --host=$(gcc -dumpmachine)"
  • musl-cross-make sets target, may override or ignore build/host
• nope env LIBTOOL=slibtool CFLAGS=-fPIC CXXFLAGS=-fPIC LDFLAGS="${LDFLAGS//-static/}" LIBS='-liberty' make -f ~/Makefile.arch_indep
• huh uh? env LIBTOOL=slibtool CFLAGS=-fPIC CXXFLAGS=-fPIC LIBS="-L${cwsw}/binutils/current/lib/ -liberty" LDFLAGS="${LDFLAGS} -s --static" make -f ~/Makefile.arch_indep ) ) >/tmp/musl-cross-make.out 2>&1
• leads to c++ abi issues previously observed (https://github.com/ryanwoodsmall/musl-misc/blob/776f8211b8019e8197ae0e9dcf0b524d29b43d81/README.md)

env \
  LD_LIBRARY_PATH="$(echo ${cwsw}/{binutils,gmp,mpc,mpfr}/current/lib | tr ' ' ':')" \
  LIBTOOL=slibtool \
  CFLAGS=-fPIC \
  CXXFLAGS=-fPIC \
  LIBS=-liberty \
  LDFLAGS="${LDFLAGS//-static/}" \
  make -f ~/Makefile.arch_indep >/tmp/musl-cross-make.out 2>&1