[m-rev.] diff: fix broken install_libgrades on non-Linux systems

[Julien Fischer]

Branches: master, 14.01

Fix a problem that broke install_libgrades on non-Linux systems.

boehm_gc/misc.c:
 	GC_setup_mark_lock is only defined if the macro PARALLEL_MARK.
 	is defined.  Add the appropriate #ifdef for this.

Julien.

diff --git a/boehm_gc/misc.c b/boehm_gc/misc.c
index 1b65243..ae34a9a 100644
--- a/boehm_gc/misc.c
+++ b/boehm_gc/misc.c
@@ -744,9 +744,11 @@ 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))
-     GC_setup_mark_lock();
-#   endif /* GC_PTHREADS */
+#   ifdef PARALLEL_MARK
+#     if (defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS))
+        GC_setup_mark_lock();
+#     endif /* GC_PTHREADS */
+#   endif /* PARALLEL_MARK */
  #   if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
        InitializeCriticalSection(&GC_write_cs);
  #   endif