--- lib/cpluff/configure.ac.orig	2016-02-20 15:21:19 UTC
+++ lib/cpluff/configure.ac
@@ -109,12 +109,12 @@ if test "$enable_threads" != no; then
     AC_LINK_IFELSE(
 [AC_LANG_SOURCE([#include <pthread.h>
 
-int main(int argc, char **argv) {
+[int main(int argc, char **argv) {
 	pthread_mutex_t mutex;
 	
 	pthread_mutex_init(&mutex, NULL);
 	return 0;
-}
+}]
 ])], [AC_MSG_RESULT([yes])
 cp_threads=Posix], AC_MSG_RESULT([no]))
   fi
@@ -126,10 +126,10 @@ cp_threads=Posix], AC_MSG_RESULT([no]))
     AC_LINK_IFELSE(
 [AC_LANG_SOURCE([#include <windows.h>
 
-int main(int argc, char **argv) {
+[int main(int argc, char **argv) {
   CreateMutex(NULL, FALSE, NULL);
   return 0;
-}
+}]
 ])], [AC_MSG_RESULT([yes])
 cp_threads=Windows], AC_MSG_RESULT([no]))
   fi