Merge branch 'asm-no-slash-question' into release-3.14

Merge-request: !2984

Modules/CMakeDetermineASMCompiler.cmake

@@ -83,7 +83,7 @@ if(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER_ID)
   set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_REGEX_XL "XL C")
 
   list(APPEND CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDORS MSVC )
-  set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_FLAGS_MSVC "/?")
+  set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_FLAGS_MSVC "-?")
   set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_REGEX_MSVC "Microsoft")
 
   list(APPEND CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDORS TI )

Modules/CMakeDetermineCompilerId.cmake

@@ -824,7 +824,7 @@ function(CMAKE_DIAGNOSE_UNSUPPORTED_CLANG lang envvar)
   endif()
 
   # Test whether an MSVC-like command-line option works.
-  execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" /?
+  execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" -?
     RESULT_VARIABLE _clang_result
     OUTPUT_VARIABLE _clang_stdout
     ERROR_VARIABLE _clang_stderr)

Modules/CMakeDetermineVSServicePack.cmake

@@ -79,7 +79,7 @@ endfunction()
 function(_DetermineVSServicePack_FastCheckVersionWithCompiler _SUCCESS_VAR  _VERSION_VAR)
     if(EXISTS ${CMAKE_CXX_COMPILER})
       execute_process(
-          COMMAND ${CMAKE_CXX_COMPILER} /?
+          COMMAND ${CMAKE_CXX_COMPILER} -?
           ERROR_VARIABLE _output
           OUTPUT_QUIET
         )