Merge pull request #1277 from performous/fix-clang-detection

Thirdparty benchmark: Fix Clang detection.

Author: nlohmann

benchmarks/thirdparty/benchmark/CMakeLists.txt

@@ -140,7 +140,7 @@ else()
       if (GCC_RANLIB)
         set(CMAKE_RANLIB ${GCC_RANLIB})
       endif()
-    elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
+    elseif("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
       include(llvm-toolchain)
     endif()
   endif()
@@ -165,7 +165,7 @@ else()
 endif()
 
 if (BENCHMARK_USE_LIBCXX)
-  if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
     add_cxx_compiler_flag(-stdlib=libc++)
   elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
           "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")

benchmarks/thirdparty/benchmark/cmake/HandleGTest.cmake

@@ -7,7 +7,7 @@ macro(build_external_gtest)
   include(ExternalProject)
   set(GTEST_FLAGS "")
   if (BENCHMARK_USE_LIBCXX)
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
       list(APPEND GTEST_FLAGS -stdlib=libc++)
     else()
       message(WARNING "Unsupported compiler (${CMAKE_CXX_COMPILER}) when using libc++")