From da816dff5d8b5d3b49a19eeeddcdf9e8b80037cd Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Tue, 6 Dec 2016 18:49:22 +0000
Subject: Fix building without threads (pthreads).

Note: 'configure --disable-threads' or 'cmake -DOPTION_USE_THREADS=OFF'.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12137 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_lock.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Fl_lock.cxx b/src/Fl_lock.cxx
index f8c9266e4..dd6c58cdd 100644
--- a/src/Fl_lock.cxx
+++ b/src/Fl_lock.cxx
@@ -401,13 +401,16 @@ void lock_ring() {
   pthread_mutex_lock(ring_mutex);
 }
 
-#else
+#else // ! HAVE_PTHREAD
 
 void Fl_Posix_System_Driver::awake(void*) {}
 int Fl_Posix_System_Driver::lock() { return 1; }
 void Fl_Posix_System_Driver::unlock() {}
 void* Fl_Posix_System_Driver::thread_message() { return NULL; }
 
+void lock_ring() {}
+void unlock_ring() {}
+
 #endif // HAVE_PTHREAD
 
 
-- 
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