use native paths for output under Windows

CMake/cotire.cmake

@@ -889,7 +889,7 @@ function (cotire_init_compile_cmd _cmdVar _language _compilerLauncher _compilerE
 	if (NOT _compilerArg1)
 		set (_compilerArg1 ${CMAKE_${_language}_COMPILER_ARG1})
 	endif()
-	if (WIN32 AND CMAKE_${_language}_COMPILER_ID MATCHES "MSVC|Intel")
+	if (WIN32)
 		file (TO_NATIVE_PATH "${_compilerExe}" _compilerExe)
 	endif()
 	string (STRIP "${_compilerArg1}" _compilerArg1)
@@ -1249,7 +1249,7 @@ function (cotire_scan_includes _includesVar)
 		return()
 	endif()
 	# add source files to be scanned
-	if (WIN32 AND "${_option_COMPILER_ID}" MATCHES "MSVC|Intel")
+	if (WIN32)
 		foreach (_sourceFile ${_existingSourceFiles})
 			file (TO_NATIVE_PATH "${_sourceFile}" _sourceFileNative)
 			list (APPEND _cmd "${_sourceFileNative}")
@@ -1260,7 +1260,7 @@ function (cotire_scan_includes _includesVar)
 	if (COTIRE_VERBOSE)
 		message (STATUS "execute_process: ${_cmd}")
 	endif()
-	if (_option_COMPILER_ID MATCHES "MSVC")
+	if (MSVC_IDE OR _option_COMPILER_ID MATCHES "MSVC")
 		# cl.exe messes with the output streams unless the environment variable VS_UNICODE_OUTPUT is cleared
 		unset (ENV{VS_UNICODE_OUTPUT})
 	endif()
@@ -1496,7 +1496,12 @@ function (cotire_generate_prefix_header _prefixFile)
 	if (_unparsedLines)
 		if (COTIRE_VERBOSE OR _scanResult OR NOT _selectedHeaders)
 			list (LENGTH _unparsedLines _skippedLineCount)
-			message (STATUS "${_skippedLineCount} line(s) skipped, see ${_unparsedLinesFile}")
+			if (WIN32)
+				file (TO_NATIVE_PATH "${_unparsedLinesFile}" _unparsedLinesLogPath)
+			else()
+				file (RELATIVE_PATH _unparsedLinesLogPath "${CMAKE_BINARY_DIR}" "${_unparsedLinesFile}")
+			endif()
+			message (STATUS "${_skippedLineCount} line(s) skipped, see ${_unparsedLinesLogPath}")
 		endif()
 		string (REPLACE ";" "\n" _unparsedLines "${_unparsedLines}")
 	endif()
@@ -1875,7 +1880,7 @@ function (cotire_precompile_prefix_header _prefixFile _pchFile _hostFile)
 	if (COTIRE_VERBOSE)
 		message (STATUS "execute_process: ${_cmd}")
 	endif()
-	if (_option_COMPILER_ID MATCHES "MSVC")
+	if (MSVC_IDE OR _option_COMPILER_ID MATCHES "MSVC")
 		# cl.exe messes with the output streams unless the environment variable VS_UNICODE_OUTPUT is cleared
 		unset (ENV{VS_UNICODE_OUTPUT})
 	elseif (_option_COMPILER_ID MATCHES "GNU|Clang")