There is a compile warning coming from intrincs/membarrier.c:
/../../mingw-w64/mingw-w64-crt/intrincs/membarrier.c:4:6: warning: no
previous prototype for 'MemoryBarrier' [-Wmissing-prototypes]/
There are two ways to fix it.
1) The easy, non-controversial way is to just add the prototype to the
file. And maybe to add the x64 version of code for slightly faster
performance.
2) Of course I'm going to recommend the other fix which is to delete
this file. MemoryBarrier is NOT an intrinsic (ie it is not implemented
as a builtin by the MSVC compiler). According to MSDN
<http://msdn.microsoft.com/en-us/library/ms684208%28v=VS.85%29.aspx>
It's just an macro that's defined in winnt.h. Which we already do.
The attached patch does the delete. I can create the other patch
instead if that seems like a better approach.
dw
Index: intrincs/membarrier.c
===================================================================
--- intrincs/membarrier.c (revision 5979)
+++ intrincs/membarrier.c (working copy)
@@ -1,10 +0,0 @@
-#include <intrin.h>
-
-/* for x86 only */
-void MemoryBarrier (void)
-{
- __LONG32 Barrier = 0;
- __asm__ __volatile__("xchgl %%eax,%0 "
- :"=r" (Barrier));
-}
-
Index: Makefile.am
===================================================================
--- Makefile.am (revision 5979)
+++ Makefile.am (working copy)
@@ -287,7 +287,7 @@
# these only go into the 32 bit version:
src_intrincs32=\
- intrincs/membarrier.c intrincs/readfsbyte.c intrincs/readfsword.c intrincs/readfsdword.c \
+ intrincs/readfsbyte.c intrincs/readfsword.c intrincs/readfsdword.c \
intrincs/writefsbyte.c intrincs/writefsword.c intrincs/writefsdword.c
if LIB32
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