[LIBMETAL PATCH] atomic: support c++

[Wendy Liang]

Allow using libmetal in c++ program.
When c++ program uses libmetal, it will use
the default atomic impelementation defined
in libmetal library.

Signed-off-by: Wendy Liang <jli...@xilinx.com>
---
lib/atomic.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/atomic.h b/lib/atomic.h
index f722d6c..05d8b4f 100644
--- a/lib/atomic.h
+++ b/lib/atomic.h
@@ -38,7 +38,8 @@

#include "metal/config.h"

-#if defined(HAVE_STDATOMIC_H) && !defined(__STDC_NO_ATOMICS__)
+#if defined(HAVE_STDATOMIC_H) && !defined(__STDC_NO_ATOMICS__) && \
+ !defined(__cplusplus)
# include <stdatomic.h>
#elif defined(__GNUC__)
# include <metal/compiler/gcc/atomic.h>
--
2.7.4

[scdrod...@gmail.com]

I just tested your patch with the OpenAMP echo test example, it works for the atomics, the compiler now goes through the atomics. But the project is not being compiled. there is still some error that I can't understand.
../../openamp_test_bsp/ps7_cortexa9_1/include/metal/irq.h:119:1: error: expected declaration before '}' token

it comes from the include metal/irq.h in helper.c

[Jiaying Liang]

[Wendy] Thanks for trying the patch, it turned out there are headers missing
'extern "C"'. I have sent another patch for it. We haven't tested C++ program with open-amp, please let us know if you have issues and patches are welcomed.

Best Regards,
Wendy

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