AC_TRY_COMPILE works only for code that fits inside "main()"; the test

for __attribute__ doesn't fit inside "main()" with GCC 4.0, as it
defines a function.

diff --git a/aclocal.m4 b/aclocal.m4
index 24e483d3c38ba52eb4c4bb00ce1d422cf4f02fd4..6c8e3b0edbe6f2a392318f74b35402b5e64d5f0b 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,4 +1,4 @@
-dnl @(#) $Header: /tcpdump/master/tcpdump/aclocal.m4,v 1.109 2005-04-21 02:21:47 guy Exp $ (LBL)
+dnl @(#) $Header: /tcpdump/master/tcpdump/aclocal.m4,v 1.110 2005-04-21 03:50:29 guy Exp $ (LBL)
 dnl
 dnl Copyright (c) 1995, 1996, 1997, 1998
 dnl    The Regents of the University of California.  All rights reserved.
@@ -1211,10 +1211,10 @@ dnl
 AC_DEFUN(AC_C___ATTRIBUTE__, [
 AC_MSG_CHECKING(for __attribute__)
 AC_CACHE_VAL(ac_cv___attribute__, [
-AC_TRY_COMPILE([
+AC_COMPILE_IFELSE(
+  AC_LANG_SOURCE([[
 #include <stdlib.h>
-],
-[
+
 static void foo(void) __attribute__ ((noreturn));
 
 static void
@@ -1222,7 +1222,13 @@ foo(void)
 {
   exit(1);
 }
-],
+
+int
+main(int argc, char **argv)
+{
+  foo();
+}
+  ]]),
 ac_cv___attribute__=yes,
 ac_cv___attribute__=no)])
 if test "$ac_cv___attribute__" = "yes"; then

diff --git a/configure b/configure
index b14bce26766e102efd6c9ac04247c0e0da3f4290..168a1a93207db13fdf518ac7367541beb8e1d672 100755 (executable)
--- a/configure
+++ b/configure
@@ -2597,10 +2597,6 @@ cat >>conftest.$ac_ext <<_ACEOF
 
 #include <stdlib.h>
 
-int
-main ()
-{
-
 static void foo(void) __attribute__ ((noreturn));
 
 static void
@@ -2609,9 +2605,12 @@ foo(void)
   exit(1);
 }
 
-  ;
-  return 0;
+int
+main(int argc, char **argv)
+{
+  foo();
 }
+
 _ACEOF
 rm -f conftest.$ac_objext
 if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5