Try this -std=c++17 like -std=c++1z
+MM_AX_CXX_COMPILE_STDCXX_1z([noext], [mandatory])
I hope you succeed
- - - Updated - - -
If the error remains, go back to c++11
CXXFLAGS += "-std=c++11" with gcc4.9.4
Try this -std=c++17 like -std=c++1z
+MM_AX_CXX_COMPILE_STDCXX_1z([noext], [mandatory])
I hope you succeed
- - - Updated - - -
If the error remains, go back to c++11
CXXFLAGS += "-std=c++11" with gcc4.9.4