cmake detects clang-cl as clang

Question

I built boringssl with cmake and msvc Then I tried to build with clang-cl so I used -T"LLVM-vs2014" in vmake arguments

Clang-cl uses cl arguments however cmake used gcc style arguments without adding -Xclang

Answer 1

The proper way to handle this case is checking for

(CMAKE_CXX_COMPILER_ID STREQUAL Clang AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"))

Answer 2

the problem was here :

if(CMAKE_COMPILER_IS_GNUCXX OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wshadow -Werror -Wno-error=shadow -Wno-error=unused-value -ggdb -std=gnu89")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wshadow -Werror -Wno-error=shadow -Wno-error=unused-value -ggdb -std=c++0x")

I changed Clang to Clng so clang-cl wasn't identified as clang.exe which take gcc style arguments