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libselinux: Fix cross-compilation #22952

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merged 6 commits into from
Jun 6, 2024
Merged

libselinux: Fix cross-compilation #22952

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36cc7d6
libselinux: Fix cross-compilation
jwillikers Mar 1, 2024
cb7bd70
Merge branch 'master' into libselinux-cross-compile
jwillikers Apr 11, 2024
2ce47e6
Merge branch 'master' into libselinux-cross-compile
jwillikers Apr 17, 2024
ef73bf0
Bump pkgconf
jwillikers Jun 5, 2024
2484dc5
Only set PKG_CONFIG_LIBDIR when cross-compiling
jwillikers Jun 5, 2024
785e1fa
Update recipes/libselinux/all/conanfile.py
franramirez688 Jun 6, 2024
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9 changes: 9 additions & 0 deletions recipes/libselinux/all/conandata.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -40,16 +40,25 @@
base_path: libselinux-3.6
patch_description: "Fix a missing #include <stdint.h>"
patch_type: "portability"
- patch_file: patches/0004-libsepol-src-Makefile-fix-reallocarray-detection.patch
patch_description: "libsepol/src/Makefile: fix reallocarray detection"
patch_source: "https://lore.kernel.org/selinux/20240108210314.339682-1-fontaine.fabrice@gmail.com/"
patch_type: "portability"
base_path: libsepol-3.6
- patch_file: patches/0005-libselinux-libsepol-Add-CFLAGS-and-LDFLAGS.patch
patch_description: "libselinux, libsepol: Add CFLAGS and LDFLAGS to Makefile checks"
patch_source: "https://lore.kernel.org/selinux/20240313224806.2859045-1-jwcart2@gmail.com/T/#u"
patch_type: "portability"
"3.3":
- patch_file: patches/0003-fix-link-pcre.patch
base_path: libselinux-3.3

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Schema outlined in https://github.com/conan-io/conan-center-index/blob/master/docs/adding_packages/conandata_yml_format.md#patches-fields is not followed.

required key(s) 'patch_description', 'patch_type' not found in 
      - patch_file: patches/0003-fix ... 
    ^ (line: 53)
"3.0":
- patch_file: patches/0001-fix-fno-common-3.0.patch
base_path: libsepol-3.0

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required key(s) 'patch_description', 'patch_type' not found in 
      - patch_file: patches/0001-fix ... 
    ^ (line: 56)
- patch_file: patches/0002-remove-cil_mem_error_handler.patch
base_path: libsepol-3.0

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required key(s) 'patch_description', 'patch_type' not found in 
      - patch_file: patches/0002-rem ... 
    ^ (line: 58)
"2.9":
- patch_file: patches/0001-fix-fno-common-2.9.patch
base_path: libsepol-2.9

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      - patch_file: patches/0001-fix ... 
    ^ (line: 61)
- patch_file: patches/0002-remove-cil_mem_error_handler.patch
base_path: libsepol-2.9

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      - patch_file: patches/0002-rem ... 
    ^ (line: 63)
8 changes: 6 additions & 2 deletions recipes/libselinux/all/conanfile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

from conan import ConanFile
from conan.errors import ConanInvalidConfiguration
from conan.tools.build import cross_building
from conan.tools.env import VirtualBuildEnv
from conan.tools.files import apply_conandata_patches, chdir, copy, export_conandata_patches, get, rename, replace_in_file, save
from conan.tools.gnu import Autotools, AutotoolsToolchain, PkgConfigDeps
Expand Down Expand Up @@ -62,7 +63,7 @@ def validate(self):
def build_requirements(self):
self.tool_requires("flex/2.6.4")
if not self.conf.get("tools.gnu:pkg_config", default=False, check_type=str):
self.tool_requires("pkgconf/2.0.3")
self.tool_requires("pkgconf/2.2.0")

def source(self):
for download in self.conan_data["sources"][self.version]:
Expand All @@ -87,7 +88,10 @@ def generate(self):
sepol_lib_folder = os.path.join(self._sepol_source_folder, "src")
tc.extra_ldflags.append(f"-L{sepol_lib_folder}")
tc.make_args.append("USE_PCRE2=y")
tc.generate()
env = tc.environment()
if cross_building(self):
env.append_path("PKG_CONFIG_LIBDIR", self.generators_folder)
tc.generate(env=env)
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def build(self):
apply_conandata_patches(self)
Expand Down
48 changes: 48 additions & 0 deletions recipes/libselinux/all/patches/0004-libsepol-src-Makefile-fix-reallocarray-detection.patch
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@@ -0,0 +1,48 @@
From a520f972bce9ec267f4e76b729bc3b7c1bdf13e6 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Mon, 8 Jan 2024 22:03:14 +0100
Subject: [PATCH 1/3] libsepol/src/Makefile: fix reallocarray detection

Pass LDFLAGS when checking for reallocarray to avoid the following
static build failure with musl raised since version 3.4 and
https://github.com/SELinuxProject/selinux/commit/f0a5f6e33084bd83d409bb7c932256139f471e71
because -static is not passed when checking for reallocarray:

/home/autobuild/autobuild/instance-9/output-1/host/bin/armeb-buildroot-linux-musleabi-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O0 -g0 -static -I. -I../include -D_GNU_SOURCE -I../cil/include -fPIC -c -o assertion.o assertion.c
In file included from assertion.c:28:
private.h:88:21: error: static declaration of 'reallocarray' follows non-static declaration
88 | static inline void* reallocarray(void *ptr, size_t nmemb, size_t size) {
| ^~~~~~~~~~~~
In file included from ../include/sepol/policydb/mls_types.h:35,
from ../include/sepol/policydb/context.h:23,
from ../include/sepol/policydb/policydb.h:62,
from assertion.c:24:
/home/autobuild/autobuild/instance-9/output-1/host/armeb-buildroot-linux-musleabi/sysroot/usr/include/stdlib.h:150:7: note: previous declaration of 'reallocarray' with type 'void *(void *, size_t, size_t)' {aka 'void *(void *, unsigned int, unsigned int)'}
150 | void *reallocarray (void *, size_t, size_t);
| ^~~~~~~~~~~~

Fixes:
- http://autobuild.buildroot.org/results/0170032548a38e2c991d62dc5823808458ad03b3

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: James Carter <jwcart2@gmail.com>
---
src/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Makefile b/src/Makefile
index d80a941f..16b9bd5e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -31,7 +31,7 @@ endif

# check for reallocarray(3) availability
H := \#
-ifeq (yes,$(shell printf '${H}define _GNU_SOURCE\n${H}include <stdlib.h>\nint main(void){void*p=reallocarray(NULL, 1, sizeof(char));return 0;}' | $(CC) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
+ifeq (yes,$(shell printf '${H}define _GNU_SOURCE\n${H}include <stdlib.h>\nint main(void){void*p=reallocarray(NULL, 1, sizeof(char));return 0;}' | $(CC) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
override CFLAGS += -DHAVE_REALLOCARRAY
endif

--
2.44.0

61 changes: 61 additions & 0 deletions recipes/libselinux/all/patches/0005-libselinux-libsepol-Add-CFLAGS-and-LDFLAGS.patch
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@@ -0,0 +1,61 @@
[PATCH] libselinux, libsepol: Add CFLAGS and LDFLAGS to Makefile checks
@ 2024-03-13 22:48 James Carter
0 siblings, 0 replies; only message in thread
From: James Carter @ 2024-03-13 22:48 UTC (permalink / raw)
To: selinux; +Cc: jordan, winfried_mb2, James Carter

In libselinux there is an availability check for strlcpy() and
in both libselinux and libsepol there are availability checks for
reallocarray() in the src Makfiles. CFLAGS and LDFLAGS are needed
for cross-compiling, but, unfortunately, the default CFLAGS cause
all of these availability checks to fail to compile because of
compilationerrors (rather than just the function not being available).

Add CFLAGS and LDFLAGS to the availibility checks, update the checks
so that a compilation error will only happen if the function being
checked for is not available, and make checks for the same function
the same in both libselinux and libsepol.

Suggested-by: Jordan Williams <jordan@jwillikers.com>
Suggested-by: Winfried Dobbe <winfried_mb2@xmsnet.nl>
Signed-off-by: James Carter <jwcart2@gmail.com>
---
libselinux/src/Makefile | 4 ++--
libsepol/src/Makefile | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libselinux-3.6/src/Makefile b/libselinux-3.6/src/Makefile
index d3b981fc..41cfbdca 100644
--- a/libselinux-3.6/src/Makefile
+++ b/libselinux-3.6/src/Makefile
@@ -104,13 +104,13 @@ override CFLAGS += -I../include -D_GNU_SOURCE $(DISABLE_FLAGS) $(PCRE_CFLAGS)

# check for strlcpy(3) availability
H := \#
-ifeq (yes,$(shell printf '${H}include <string.h>\nint main(void){char*d,*s;strlcpy(d, s, 0);return 0;}' | $(CC) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
+ifeq (yes,$(shell printf '${H}include <string.h>\nint main(void){char d[2];const char *s="a";return (size_t)strlcpy(d,s,sizeof(d))>=sizeof(d);}' | $(CC) $(CFLAGS) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
override CFLAGS += -DHAVE_STRLCPY
endif

# check for reallocarray(3) availability
H := \#
-ifeq (yes,$(shell printf '${H}include <stdlib.h>\nint main(void){reallocarray(NULL, 0, 0);return 0;}' | $(CC) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
+ifeq (yes,$(shell printf '${H}include <stdlib.h>\nint main(void){return reallocarray(NULL,0,0)==NULL;}' | $(CC) $(CFLAGS) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
override CFLAGS += -DHAVE_REALLOCARRAY
endif

diff --git a/libsepol-3.6/src/Makefile b/libsepol-3.6/src/Makefile
index 16b9bd5e..7b0e8446 100644
--- a/libsepol-3.6/src/Makefile
+++ b/libsepol-3.6/src/Makefile
@@ -31,7 +31,7 @@ endif

# check for reallocarray(3) availability
H := \#
-ifeq (yes,$(shell printf '${H}define _GNU_SOURCE\n${H}include <stdlib.h>\nint main(void){void*p=reallocarray(NULL, 1, sizeof(char));return 0;}' | $(CC) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
+ifeq (yes,$(shell printf '${H}include <stdlib.h>\nint main(void){return reallocarray(NULL,0,0)==NULL;}' | $(CC) $(CFLAGS) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
override CFLAGS += -DHAVE_REALLOCARRAY
endif

--
2.44.0
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