See also: https://bugzilla.redhat.com/show_bug.cgi?id=2144458

--- a/configure.in
+++ b/configure.in
@@ -36,7 +36,7 @@ AC_CACHE_CHECK([for large file support],rzip_cv_HAVE_LARGE_FILES,[
 AC_TRY_RUN([
 #include <stdio.h>
 #include <sys/types.h>
-main() { return (sizeof(off_t) == 4); }],
+int main(void) { return (sizeof(off_t) == 4); }],
 rzip_cv_HAVE_LARGE_FILES=yes,
 rzip_cv_HAVE_LARGE_FILES=no,
 rzip_cv_HAVE_LARGE_FILES=cross)])