[CMake] CMAKE_<lang>_COMPILER_ID not set on Darwin

[Nick Overdijk]

We use this

if(CMAKE_C_COMPILER MATCHES "clang" OR CMAKE_CXX_COMPILER MATCHES "clang")
	set(COMPILING_WITH_CLANG True)
elseif(CMAKE_C_COMPILER MATCHES ".*gcc.*" OR CMAKE_CXX_COMPILER MATCHES ".*g[+][+].*")
	set(COMPILING_WITH_GCC True)
endif()

In our project

On 2013-30-01, at 14:42:05 , Thomas Nilsson wrote:

> I was looking for a way to identify the compiler as clang to know if I should pass it a clang specific flag ("-x c++").
> 
> On Darwin default compiler is Clang used through /usr/bin/cc and and /usr/bin/c++. The identification is clearly signaled as "Clang 4.1.0" but CMAKE_CXX_COMPILER_ID is not set. Obviously CMAKE_CXX_COMPILER is set to /usr/bin/c++.
> 
> Given my belief that CMAKE_CXX_COMPILER_ID will not be implemented soon, what are my options?
> 
> Thomas
> 
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