Since the bump to version 2.0.8 in commit
f5906644b4, bird uses a home-grown "GNU Autoconf
2.69e" instead of standard autoconf 2.69 to generate the configure
script. This fork seems to generate incorrect code: it uses
ac_test_CFLAGS=${CFLAGS+y}
to remember if CFLAGS was saved, while standard autoconf uses
ac_test_CFLAGS=${CFLAGS+set}
The configure.ac code itself, however, uses
if test "$ac_test_CFLAGS" != set ; then
to check if CFLAGS was overridden.
Thus, Buildroot's CFLAGS are not taken into account and this leads to
the following build failure:
checking for glob.h... no
configure: error: glob.h not found.
This build failure is raised because -g0 and -g are both passed to gcc:
configure:5207: checking for glob.h
configure:5230: /data/buildroot-autobuilder/instance-0/output-1/host/bin/mips64el-linux-gcc -o conftest -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -pthread -fno-strict-aliasing -fno-strict-overflow -flto -Wall -Wextra -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign -Wno-missing-field-initializers -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -pthread -flto=4 -g conftest.c >&5
/data/buildroot-autobuilder/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/mips64el-buildroot-linux-uclibc/8.4.0/../../../../mips64el-buildroot-linux-uclibc/bin/ld: /tmp/ccDboxph.ltrans0.ltrans.o:(.debug_info+0x2a): undefined reference to `conftest.c.0943dc99'
/data/buildroot-autobuilder/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/mips64el-buildroot-linux-uclibc/8.4.0/../../../../mips64el-buildroot-linux-uclibc/bin/ld: /tmp/ccDboxph.ltrans0.ltrans.o:(.debug_info+0x2f): undefined reference to `conftest.c.0943dc99'
-g0 is passed by buildroot and -g is passed by bird if
$ac_test_CFLAGS" != set (since version 2.0.7 and
cc95b4594a)
To fix this, we can simply run autoreconf and generate a correct
configure script.
Fixes:
- http://autobuild.buildroot.org/results/1d2acc9f6b8830adc8b62d6b2e55837abae561a9
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
03c148c8de