Replace obsolete autoconf macros with their modern replacements.

AC_TRY_COMPILE(...) -> AC_COMPILE_IFELSE([AC_LANG_PROGRAM(...)])
AC_TRY_LINK(...) -> AC_LINK_IFELSE([AC_LANG_PROGRAM(...)])
AC_TRY_RUN(...) -> AC_RUN_IFELSE([AC_LANG_PROGRAM(...)])
AC_LANG_SAVE/RESTORE -> AC_LANG_PUSH/POP
AC_DECL_SYS_SIGLIST -> AC_CHECK_DECLS(...) (per snippet in autoconf manual)

Also use AC_LANG_SOURCE instead of AC_LANG_PROGRAM, where the main()
function is not needed.

With these changes, autoconf -Wall doesn't complain anymore.

Andreas Karlsson

1 files changed, 0 insertions, 28 deletions

diff --git a/configure b/configure
index 5462ac4c6bd..0407c4f8bfc 100755
--- a/configure
+++ b/configure
@@ -10465,13 +10465,7 @@ else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 static unsigned long int x = __builtin_bswap32(0xaabbccdd);
-int
-main ()
-{
 
-  ;
-  return 0;
-}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   pgac_cv__builtin_bswap32=yes
@@ -10495,13 +10489,7 @@ else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 static int x; static int y[__builtin_constant_p(x) ? x : 1];
-int
-main ()
-{
 
-  ;
-  return 0;
-}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   pgac_cv__builtin_constant_p=yes
@@ -11433,13 +11421,6 @@ else
 #include <sys/socket.h>
 #endif
 extern $ac_cv_func_accept_return accept ($ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *);
-int
-main ()
-{
-
-  ;
-  return 0;
-}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   ac_not_found=no; break 4
@@ -12338,7 +12319,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
-
 ac_fn_c_check_func "$LINENO" "syslog" "ac_cv_func_syslog"
 if test "x$ac_cv_func_syslog" = xyes; then :
   ac_fn_c_check_header_mongrel "$LINENO" "syslog.h" "ac_cv_header_syslog_h" "$ac_includes_default"
@@ -12519,7 +12499,6 @@ fi
 if test "$enable_thread_safety" = yes -a "$PORTNAME" != "win32"; then
 
 
-
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -13287,13 +13266,6 @@ if test x"$HAVE_LONG_LONG_INT_64" = xyes ; then
 #define INT64CONST(x)  x##LL
 long long int foo = INT64CONST(0x1234567890123456);
 
-int
-main ()
-{
-
-  ;
-  return 0;
-}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :