Change main () to main (void) for C/C++

This patch changes "main ()" to "main (void)" for C/C++.
See: http://lists.gnu.org/archive/html/bug-autoconf/2014-01/msg00005.html

On my machine, before this patch, 3 tests were failing:

  38: tools.at:1329      autom4te cache locking
 218: autotest.at:1893   C unit tests
      ac_config_testdir at_tested autotest
 219: autotest.at:1948   C unit tests (EXEEXT)
      ac_config_testdir at_tested autotest

With this patch, 2 tests were failing:

 218: autotest.at:1893   C unit tests
      ac_config_testdir at_tested autotest
 219: autotest.at:1948   C unit tests (EXEEXT)
      ac_config_testdir at_tested autotest

(I suspect that 38 is unrelated.)

Signed-off-by: Vincent Lefevre <vincent@vinc17.net>
Copyright-paperwork-exempt: Yes

1 files changed, 5 insertions, 5 deletions

diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 41752127..c7790ec3 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -1147,7 +1147,7 @@ year_2050_test ()
 }
 
 int
-main ()
+main (void)
 {
   time_t t, delta;
   int i, j;
@@ -1274,7 +1274,7 @@ AC_CACHE_CHECK([for working mmap], [ac_cv_func_mmap_fixed_mapped],
 #endif /* no HAVE_GETPAGESIZE */
 
 int
-main ()
+main (void)
 {
   char *data, *data2, *data3;
   const char *cdata2;
@@ -1562,7 +1562,7 @@ AC_CACHE_CHECK(for working strtod, ac_cv_func_strtod,
 double strtod ();
 #endif
 int
-main()
+main (void)
 {
   {
     /* Some versions of Linux strtod mis-parse strings with leading '+'.  */
@@ -1900,7 +1900,7 @@ sparc_address_test (int arg)
 }
 
 int
-main ()
+main (void)
 {
   pid_t parent = getpid ();
   pid_t child;
@@ -2018,7 +2018,7 @@ AC_CACHE_CHECK([for wait3 that fills in rusage],
 #include <sys/wait.h>
 /* HP-UX has wait3 but does not fill in rusage at all.  */
 int
-main ()
+main (void)
 {
   struct rusage r;
   int i;