diff -ru csync2-2.0+git.1600444747.83b3644/configure.ac csync2-2.0+git.1600444747.83b3644.patched/configure.ac
--- csync2-2.0+git.1600444747.83b3644/configure.ac      2026-04-21 16:43:15.869922567 +0200
+++ csync2-2.0+git.1600444747.83b3644.patched/configure.ac      2026-04-21 16:43:55.568864520 +0200
@@ -41,7 +41,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
-main() {
+int main() {
   struct stat st;
   char tpl[20]="/tmp/test.XXXXXX";
   int fd = mkstemp(tpl);