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| author | Eric <ewild@sysmocom.de> | 2020-04-10 22:10:13 +0200 |
|---|---|---|
| committer | Hoernchen <ewild@sysmocom.de> | 2020-04-11 18:31:59 +0000 |
| commit | 099c8340edbae163205461f0d8c775dd8c225c69 (patch) | |
| tree | fc8cb4a86314c3abb8b45c3cc1e119d8c53eb316 | |
| parent | d1cd527541a27ed2771996b512b4d0876dd530f1 (diff) | |
configure.ac: fix libtool issue with clang and sanitizer
As pointed out at https://github.com/libexpat/libexpat/issues/312
libtool does not play nice with clang sanitizer builds at all.
For those builds LD shoud be set to clang too (and LDFLAGS needs the
sanitizer flags as well), because the clang compiler driver knows how
linking to the sanitizer libs works, but then at a later stage libtool
fails to actually produce the shared libraries and the build fails. This
is fixed by this patch.
Addtionally LD_LIBRARY_PATH has no effect on conftest runs during
configure time, so the rpath needs to be set to the asan library path to
ensure the configure run does not fail due to a missing asan library,
i.e.:
SANS='-fsanitize=memory -fsanitize-recover=all -shared-libsan'
export CC=clang-10
ASANPATH=$(dirname `$CC -print-file-name=libclang_rt.asan-x86_64.so`)
export LDFLAGS="-Wl,-rpath,$ASANPATH $SANS $LDFLAGS"
Change-Id: I8ebd9c6d4efda41c7c8196f963d1f04d65160754
| -rw-r--r-- | configure.ac | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 3b4ad40e..92457f16 100644 --- a/configure.ac +++ b/configure.ac @@ -24,6 +24,11 @@ LT_INIT([pic-only disable-static]) AC_CONFIG_MACRO_DIR([m4]) +dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang +AS_CASE(["$LD"],[*clang*], + [AS_CASE(["${host_os}"], + [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])]) + dnl check for pkg-config dnl * If pkg-config is missing, we get a "syntax error" for PKG_CHECK_MODULES. dnl Instead, we want to say that pkg-config and pkg.m4 are missing. |