When we use AC_SEARCH_LIBS with OTHER-LIBRARIES, current
implementation ignores OTHER-LIBRARIES when it tests
ac_lib=''.
I think that it is not intended behavior, but a bug.
A patch something like following is needed.
I put my code into public domain, if copyright matters.
diff --git a/lib/autoconf/libs.m4 b/lib/autoconf/libs.m4
index 73edad5..19892f4 100644
--- a/lib/autoconf/libs.m4
+++ b/lib/autoconf/libs.m4
@@ -53,6 +53,7 @@ AC_LANG_CONFTEST([AC_LANG_CALL([], [$1])])
for ac_lib in '' $2; do
if test -z "$ac_lib"; then
ac_res="none required"
+ LIBS="$5 $ac_func_search_save_LIBS"
else
ac_res=-l$ac_lib
LIBS="-l$ac_lib $5 $ac_func_search_save_LIBS"
--
