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authorEric <ewild@sysmocom.de>2020-04-11 01:19:46 +0200
committerEric <ewild@sysmocom.de>2020-04-11 01:19:46 +0200
commit2e90a1f015f0148407a28794d0435b5cbe9899ac (patch)
tree23c1b57ee9a584bb1ee80b28cfacfca602478107
parentb30f28f38de7423d2cc7e184dbb3c62d44e61e55 (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: I999adf84a34c03765ce6c32ece0e61d0ac6e1c13
-rw-r--r--configure.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 48de07a..d693c67 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,11 @@ AC_PROG_CXX
AC_PROG_INSTALL
LT_INIT
+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 $lib'])])
+
dnl check for pkg-config (explained in detail in libosmocore/configure.ac)
AC_PATH_PROG(PKG_CONFIG_INSTALLED, pkg-config, no)
if test "x$PKG_CONFIG_INSTALLED" = "xno"; then