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authorEric <ewild@sysmocom.de>2020-04-11 01:04:28 +0200
committerEric <ewild@sysmocom.de>2020-04-11 01:04:28 +0200
commite6b2883f10ebdd880afe6e89b779898629066153 (patch)
tree120c2d32b9fc35e865d50fe9100c8f15e459a9f1
parent6528e8c1cb3fbf2c3ca99fc6e0391026e92b5cdb (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: I7402b019c191304f639806a3c29e6bb698b398ed
-rw-r--r--configure.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 6aab8d78..5c0beded 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,6 +22,11 @@ AC_PROG_CC
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