From: Roland McGrath <roland@gnu.org>
Date: Sat, 9 Mar 1996 00:06:32 +0000 (+0000)
Subject: Fri Mar  8 15:06:48 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>
X-Git-Tag: fsf-origin~172
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9a27e3feda70b7af5813835e6afb788fbad7f04;p=thirdparty%2Fautoconf.git

Fri Mar  8 15:06:48 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* acgeneral.m4 (AC_CHECK_LIB): Declare $2 to override gcc2 internal
	prototype.
---

diff --git a/acgeneral.m4 b/acgeneral.m4
index 7c42253a..7f538827 100644
--- a/acgeneral.m4
+++ b/acgeneral.m4
@@ -1412,8 +1412,16 @@ ac_lib_var=`echo $1[_]$2 | tr '.-/+' '___p'`
 AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
 [ac_save_LIBS="$LIBS"
 LIBS="-l$1 $5 $LIBS"
-AC_TRY_LINK(, [$2()], eval "ac_cv_lib_$ac_lib_var=yes",
-  eval "ac_cv_lib_$ac_lib_var=no")dnl
+AC_TRY_LINK([/* Override any gcc2 internal prototype to avoid an error.  */
+]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
+extern "C"
+#endif
+])dnl
+char $2();
+],
+	    [$2()],
+	    eval "ac_cv_lib_$ac_lib_var=yes",
+	    eval "ac_cv_lib_$ac_lib_var=no")dnl
 LIBS="$ac_save_LIBS"
 ])dnl
 if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 7c42253a..7f538827 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -1412,8 +1412,16 @@ ac_lib_var=`echo $1[_]$2 | tr '.-/+' '___p'`
 AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
 [ac_save_LIBS="$LIBS"
 LIBS="-l$1 $5 $LIBS"
-AC_TRY_LINK(, [$2()], eval "ac_cv_lib_$ac_lib_var=yes",
-  eval "ac_cv_lib_$ac_lib_var=no")dnl
+AC_TRY_LINK([/* Override any gcc2 internal prototype to avoid an error.  */
+]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
+extern "C"
+#endif
+])dnl
+char $2();
+],
+	    [$2()],
+	    eval "ac_cv_lib_$ac_lib_var=yes",
+	    eval "ac_cv_lib_$ac_lib_var=no")dnl
 LIBS="$ac_save_LIBS"
 ])dnl
 if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then