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new b9f13756 libltdl: Skip sanitization of function for newer clang
versions
b9f13756 is described below
commit b9f13756ab2f32426630095ac1f0d049ce38e77d
Author: Bruno Haible <[email protected]>
AuthorDate: Thu Aug 13 03:13:00 2026 +0300
libltdl: Skip sanitization of function for newer clang versions
Using a clang version >= 20 finds sanitization issues that the
earlier clang version did not find.
ltdl.c:189:16: runtime error: call to function preopen_LTX_get_vtable
through pointer to incorrect function type 'const lt_dlvtable *(*)(void *)'
/home/runner/work/ci-check/ci-check/libtool-2026-08-12/build/tests/testsuite.dir/113/libltdl/loaders/preopen.c:60:
note: preopen_LTX_get_vtable defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ltdl.c:189:16
This is a temporary fix until the function prototype is fixed.
* libltdl/ltdl.c: Skip sanitization of function for clang versions that
are greater than or equal to 20.
* libltdl/ltdl.mk: Bump minor version.
---
libltdl/ltdl.c | 4 ++++
libltdl/ltdl.mk | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/libltdl/ltdl.c b/libltdl/ltdl.c
index c92e2594..bed91b8f 100644
--- a/libltdl/ltdl.c
+++ b/libltdl/ltdl.c
@@ -178,6 +178,10 @@ loader_init_callback (lt_dlhandle handle)
}
#endif /* HAVE_LIBDLLOADER */
+// TODO: fix the clang sanitization issue with the function's prototype
+#if defined __clang__ && __clang_major__ >= 20
+ __attribute__ ((no_sanitize ("function")))
+#endif
static int
loader_init (lt_get_vtable *vtable_func, lt_user_data data)
{
diff --git a/libltdl/ltdl.mk b/libltdl/ltdl.mk
index e69e0113..d74ed2ed 100644
--- a/libltdl/ltdl.mk
+++ b/libltdl/ltdl.mk
@@ -35,7 +35,7 @@ AM_CPPFLAGS += -DLT_CONFIG_H='<$(LT_CONFIG_H)>' \
-I$(srcdir)/libltdl -Ilibltdl/libltdl \
-I$(srcdir)/libltdl/libltdl
AM_LDFLAGS += -no-undefined
-LTDL_VERSION_INFO = -version-info 10:6:3
+LTDL_VERSION_INFO = -version-info 10:7:3
noinst_LTLIBRARIES += $(LT_DLLOADERS)
