error: 'mutex' in namespace 'std' does not name a type

[amandeepgautam]

I am trying to compile grpc on AIX. After fixing a few GCC8 warnings, I run into the following error:

[tt]In file included from include/grpcpp/impl/codegen/call.h:30,
from include/grpcpp/impl/call.h:22,
from include/grpcpp/channel.h:25,
from src/cpp/client/insecure_credentials.cc:23:
include/grpcpp/impl/codegen/client_context.h:419:8: error: 'mutex' in namespace 'std' does not name a type
std::mutex mu_;
^~~~~
include/grpcpp/impl/codegen/client_context.h:419:3: note: 'std::mutex' is defined in header '<mutex>'; did you forget to '#include <mutex>'?
include/grpcpp/impl/codegen/client_context.h:53:1:
+#include <mutex>

include/grpcpp/impl/codegen/client_context.h:419:3:
std::mutex mu_;
^~~
[/tt]

The following stackoverflow post gives some context:

https://stackoverflow.com/questions/14191566/c-mutex-in-namespace-std-does-not-name-a-type

However I am not sure why this is happening on AIX. Is it because of a similar problem? Is there a known workaround?

 

[amandeepgautam]

Setting CXXFLAGS=-pthread takes care of this.