source/l/gc/refer_to_GC_setup_mark_lock_only_in_PARALLEL_MARK_code.patch


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Guarding GC_setup_mark_lock usage with PARALLEL_MARK is required to avoid
an undefined reference in non-PARALLEL_MARK configurations:
commit 4c8e0dc234e671c4d64ffab9d4f94b6cd8cc2f63
Author: Thomas Schwinge < thomas at codesourcery.com >
Date:   Mon Sep 22 13:36:00 2014 +0200
    Refer to GC_setup_mark_lock only in PARALLEL_MARK code.
    
        ./.libs/libgc.so: undefined reference to `GC_setup_mark_lock'
    
    * misc.c (GC_init): Guard GC_setup_mark_lock usage.
---
 misc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git misc.c misc.c
index 41bd3f4..721a999 100644
--- misc.c
+++ misc.c
@@ -889,7 +889,7 @@ GC_API void GC_CALL GC_init(void)
         /* else */ InitializeCriticalSection (&GC_allocate_ml);
      }
 #   endif /* GC_WIN32_THREADS */
-#   if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS)
+#   if defined(PARALLEL_MARK) && defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS)
       GC_setup_mark_lock();
 #   endif /* GC_PTHREADS */
 #   if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)