autoconf: add AC_LANG_SOURCE to CC_CHECK_LDFLAGS

Inspired by https://lore.kernel.org/alsa-devel/18135209-abc9-ca1c-84e0-8ac3e75caaf1@perex.cz/t/

Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

diff --git a/config/attributes.m4 b/config/attributes.m4
index 51ac88be61875444b52737cf85141d8de2255adf..023d9b83cdaa98238540876aa30fb2292683864b 100644 (file)
--- a/config/attributes.m4
+++ b/config/attributes.m4
@@ -70,7 +70,7 @@ AC_DEFUN([CC_CHECK_LDFLAGS], [
     AS_TR_SH([cc_cv_ldflags_$1]),
     [ac_save_LDFLAGS="$LDFLAGS"
      LDFLAGS="$LDFLAGS $1"
-     AC_LINK_IFELSE([int main() { return 1; }],
+     AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 1; }])],
        [eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
        [eval "AS_TR_SH([cc_cv_ldflags_$1])="])
      LDFLAGS="$ac_save_LDFLAGS"