Merge topic 'clang-cl-TP'

7077a554 Clang: Use -TP flag for C++ sources with clang-cl

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1407

Modules/Platform/Windows-Clang-CXX.cmake

@@ -1,2 +1,3 @@
 include(Platform/Windows-Clang)
+set(_COMPILE_CXX_MSVC " -TP")
 __windows_compiler_clang(CXX)

Modules/Platform/Windows-Clang.cmake

@@ -12,6 +12,7 @@ if("x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC"
     OR "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
   include(Platform/Windows-MSVC)
   macro(__windows_compiler_clang lang)
+    set(_COMPILE_${lang} "${_COMPILE_${lang}_MSVC}")
     __windows_compiler_msvc(${lang})
   endmacro()
 else()