Fixing large file support compile-time check.

Previous check did not follow the same conventions for the function body as other AC_TRY_COMPILE checks. This resulted in incorrectly reporting that the system did not have large file support due to the following errors reported in config.log:

conftest.c:88: warning: function declaration isn't a prototype
conftest.c: In function 'main':
conftest.c:94: error: nested functions are disabled, use -fnested-functions to re-enable
conftest.c:94: warning: 'main' is normally a non-static function
configure:21041: $? = 1

diff --git a/configure.in b/configure.in
index a1d17b3b74a83eea9d6db4fb5584665f4bb610e6..e6e687ea38a377501e33a3279041745ac4c85ea0 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1132,12 +1132,7 @@ if test x$target_win32 = xno; then
                        /* Lifted this compile time assert method from: http://www.jaggersoft.com/pubs/CVu11_3.html */
                        #define COMPILE_TIME_ASSERT(pred) \
                                switch(0){case 0:case pred:;}
-
-                       int main(void)
-                       {
-                               COMPILE_TIME_ASSERT(sizeof(off_t) * CHAR_BIT == 64);
-                               return 0;
-                       }
+                       COMPILE_TIME_ASSERT(sizeof(off_t) * CHAR_BIT == 64);
                ], [
                        AC_MSG_RESULT(ok)
                        AC_DEFINE(HAVE_LARGE_FILE_SUPPORT, 1, [Have large file support])