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authorEric <ewild@sysmocom.de>2020-04-11 01:16:19 +0200
committerEric <ewild@sysmocom.de>2020-04-11 01:16:19 +0200
commit858b81a252529a78180cbcb786eab89af58afd30 (patch)
treeae56c18cd8766530cf00ff8834c5a4e63744088a
parented2d50d4e92a8d512d6a15773beeca310fa4e534 (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: I292c303840a76c5042dc077829c5df46158ca8ba
-rw-r--r--configure.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 9cf517a..fdd6941 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