[Buildroot] [PATCH] package/libselinux: fix build on old glibc with <fts.h> incompatible with LFS
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Thu Nov 28 18:05:02 UTC 2019
glibc versions prior to 2.23 have a <fts.h> implementation that is not
compatible with large file support, causing build failures such as:
In file included from selinux_restorecon.c:17:0:
/home/naourr/work/instance-0/output-1/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/fts.h:41:3: error: #error "<fts.h> cannot be used with -D_FILE_OFFSET_BITS==64"
# error "<fts.h> cannot be used with -D_FILE_OFFSET_BITS==64"
Prior to commit 3fce6f1c150dbe4be58d083008ca8dbe7257836e
("package/libselinux: fix the build with Python 3.8"), we were not
passing PKG_PYTHON_DISTUTILS_ENV in the environment. But with
3fce6f1c150dbe4be58d083008ca8dbe7257836e, we are now passing the
PKG_PYTHON_DISTUTILS_ENV variable, provided by pkg-python.mk, into the
build environment. While this is part of fixing the build of
libselinux with Python 3.8, it breaks the build because we are no
longer filtering out the -D_FILE_OFFSET_BITS=64 option from
CFLAGS. Indeed, while we do so at the beginning of libselinux.mk, it
gets overridden later by the addition of $(PKG_PYTHON_DISTUTILS_ENV).
To avoid this, we pass CFLAGS/LDFLAGS *after*
$(PKG_PYTHON_DISTUTILS_ENV) has been added. In practice, the
CFLAGS/LDFLAGS passed by $(PKG_PYTHON_DISTUTILS_ENV) are just
$(TARGET_CFLAGS) and $(TARGET_LDFLAGS), so we are not missing anything
specific.
Fixes:
http://autobuild.buildroot.net/results/ef6ff91086a094eb25b145d66d072c6d2fc60154/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
This is an alternative solution compared to what Fabrice proposed in
http://patchwork.ozlabs.org/patch/1185307/. In Fabrice's proposal, I
am not a big fan of the split of PKG_PYTHON_DISTUTILS_ENV into two
variables, the split is a bit arbitrary, and seems to serve only the
case of libselinux.
So for now, I think a solution that affects only libselinux.mk is
probably more appropriate.
---
package/libselinux/libselinux.mk | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/package/libselinux/libselinux.mk b/package/libselinux/libselinux.mk
index dd68ad9298..98db4fa89e 100644
--- a/package/libselinux/libselinux.mk
+++ b/package/libselinux/libselinux.mk
@@ -13,13 +13,10 @@ LIBSELINUX_DEPENDENCIES = libsepol pcre
LIBSELINUX_INSTALL_STAGING = YES
-# Filter out D_FILE_OFFSET_BITS=64. This fixes errors caused by glibc 2.22.
# Set SHLIBDIR to /usr/lib so it has the same value than LIBDIR, as a result
# we won't have to use a relative path in 0002-revert-ln-relative.patch
LIBSELINUX_MAKE_OPTS = \
$(TARGET_CONFIGURE_OPTS) \
- CFLAGS="$(filter-out -D_FILE_OFFSET_BITS=64,$(TARGET_CFLAGS))" \
- LDFLAGS="$(TARGET_LDFLAGS) -lpcre -lpthread" \
ARCH=$(KERNEL_ARCH) \
SHLIBDIR=/usr/lib
@@ -54,6 +51,14 @@ define LIBSELINUX_BUILD_PYTHON_BINDINGS
endef
endif # python || python3
+# Filter out D_FILE_OFFSET_BITS=64. This fixes errors caused by glibc
+# 2.22. We set CFLAGS and LDFLAGS here because we want to win over the
+# CFLAGS/LDFLAGS definitions passed by $(PKG_PYTHON_DISTUTILS_ENV)
+# when the python binding is enabled.
+LIBSELINUX_MAKE_OPTS += \
+ CFLAGS="$(filter-out -D_FILE_OFFSET_BITS=64,$(TARGET_CFLAGS))" \
+ LDFLAGS="$(TARGET_LDFLAGS) -lpcre -lpthread" \
+
define LIBSELINUX_BUILD_CMDS
$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) \
$(LIBSELINUX_MAKE_OPTS) all
--
2.23.0
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