am-utils-6.2 - convert AC_TRY_LINK to AC_LINK_IFELSE

From: Ian Kent <raven@themaw.net>

autoconf 2.71 autoreconf tells us AC_TRY_LINK is obsolete.
Convert to use the AC_LINK_IFELSE instead.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 m4/macros/check_lib2.m4 |   30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/m4/macros/check_lib2.m4 b/m4/macros/check_lib2.m4
index 64e6bb5b..7d4e5a5e 100644
--- a/m4/macros/check_lib2.m4
+++ b/m4/macros/check_lib2.m4
@@ -16,32 +16,38 @@ AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
 
 # first try with base library, without auxiliary library
 LIBS="-l$1 $LIBS"
-AC_TRY_LINK(dnl
-ifelse([$2], [main], , dnl Avoid conflicting decl of main.
+dnl ithe ifelse() macro is used to avoid conflicting decl of main.
+AC_LINK_IFELSE(
+[AC_LANG_SOURCE(
+[[
+ifelse([$2], [main], ,
 [/* Override any gcc2 internal prototype to avoid an error.  */
 ]
 [/* We use char because int might match the return type of a gcc2
     builtin and then its argument prototype would still apply.  */
 char $2();
-]),
-	    [$2()],
-	    eval "ac_cv_lib_$ac_lib_var=\"$1\"",
-	    eval "ac_cv_lib_$ac_lib_var=no")
+])]],
+	    [[$2()]])],
+	    [eval "ac_cv_lib_$ac_lib_var=\"$1\""],
+	    [eval "ac_cv_lib_$ac_lib_var=no"])
 
 # if OK, set to no auxiliary library, else try auxiliary library
 if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = no"; then
  LIBS="-l$1 $5 $LIBS"
- AC_TRY_LINK(dnl
- ifelse([$2], [main], , dnl Avoid conflicting decl of main.
+dnl ithe ifelse() macro is used to avoid conflicting decl of main.
+ AC_LINK_IFELSE(
+ [AC_LANG_SOURCE(
+ [[
+ ifelse([$2], [main], ,
  [/* Override any gcc2 internal prototype to avoid an error.  */
  ]
  [/* We use char because int might match the return type of a gcc2
      builtin and then its argument prototype would still apply.  */
  char $2();
- ]),
- 	    [$2()],
- 	    eval "ac_cv_lib_$ac_lib_var=\"$1 $5\"",
- 	    eval "ac_cv_lib_$ac_lib_var=no")
+ ])]],
+	    [[$2()]])],
+	    [eval "ac_cv_lib_$ac_lib_var=\"$1 $5\""],
+	    [eval "ac_cv_lib_$ac_lib_var=no"])
 fi
 
 LIBS="$ac_save_LIBS"