Fix mingw build error

Author: lanthora

CMakeLists.txt

@@ -531,7 +531,7 @@ write_basic_package_version_file(
 # Set config script install location in a location that find_package() will
 # look for, which is different on MS Windows than for UNIX
 # Note: also set in POCO_GENERATE_PACKAGE macro in cmake/PocoMacros.cmake
-if(WIN32)
+if(MSVC)
 	set(PocoConfigPackageLocation "cmake")
 else()
 	set(PocoConfigPackageLocation "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")

cmake/PocoMacros.cmake

@@ -40,7 +40,12 @@ if(WIN32)
 			endforeach()
 		endif(X64)
 	endif()
-	find_program(CMAKE_MC_COMPILER mc.exe HINTS "${sdk_bindir}" "${kit_bindir}" "${kit81_bindir}" ${kit10_bindir}
+	if(MINGW)
+		find_program(CMAKE_MC_COMPILER windmc.exe HINTS "${sdk_bindir}" "${kit_bindir}" 
+		DOC "path to message compiler")
+	else()
+		find_program(CMAKE_MC_COMPILER mc.exe HINTS "${sdk_bindir}" "${kit_bindir}" "${kit81_bindir}" ${kit10_bindir}
+	endif()
 		DOC "path to message compiler")
 	if(NOT CMAKE_MC_COMPILER)
 		message(FATAL_ERROR "message compiler not found: required to build")
@@ -237,7 +242,7 @@ endif()
 # Set config script install location in a location that find_package() will
 # look for, which is different on MS Windows than for UNIX
 # Note: also set in root CMakeLists.txt
-if(WIN32)
+if(MSVC)
 	set(PocoConfigPackageLocation "cmake")
 else()
 	set(PocoConfigPackageLocation "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")