# Windows XP

set(CMAKE_SYSTEM_NAME Windows)
set(CMAKE_SYSTEM_VERSION 5.1)
set(CMAKE_SYSTEM_PROCESSOR x86)

set(TARGET_VERSION_MAJOR 5)
set(TARGET_VERSION_MINOR)

set(_MSVC_TRIPLET "i686-pc-windows-msvc")

# CXXRTDIR = $(VCDIR)/crt
# UCRTDIR = $(VCDIR)/ucrt
# PSDKDIR = $(VCDIR)/winsdk

if("$ENV{VCDIR}" STREQUAL "")
	message(FATAL_ERROR "Please set VCDIR in your environment to an appropiate path.")
endif()

set(_CRTDIR "$ENV{VCDIR}/crt")
set(_UCRTDIR "$ENV{VCDIR}/ucrt")
set(_PSDKDIR "$ENV{VCDIR}/winsdk")

set(_CLANG_BASEFLAGS "-target ${_MSVC_TRIPLET} -fms-extensions -fms-compatibility-version=19 -isystem ${_CRTDIR}/include -isystem ${_UCRTDIR}/include -isystem ${_PSDKDIR}/include/shared -isystem ${_PSDKDIR}/include/um")
set(_CLANG_ARCHFLAGS "-march=pentium4")

set(CMAKE_C_COMPILER "clang" CACHE FILEPATH "")
set(CMAKE_CXX_COMPILER "clang++" CACHE FILEPATH "")
set(CMAKE_LINKER "lld-link" CACHE FILEPATH "")

set(CMAKE_ASM_FLAGS_INIT "${_CLANG_BASEFLAGS} ${_CLANG_ARCHFLAGS}")
set(CMAKE_C_FLAGS_INIT "${_CLANG_BASEFLAGS} ${_CLANG_ARCHFLAGS}")
set(CMAKE_C_FLAGS_RELEASE_INIT "${CMAKE_C_FLAGS_INIT} -fomit-frame-pointer")
set(CMAKE_CXX_FLAGS_INIT "${CMAKE_C_FLAGS_INIT}")
set(CMAKE_CXX_FLAGS_RELEASE_INIT "${CMAKE_C_FLAGS_RELEASE_INIT} ${CMAKE_CXX_FLAGS_INIT}")

# Set base linker library paths
foreach(type EXE MODULE SHARED)
	set(CMAKE_${type}_LINKER_FLAGS "-Xlinker /libpath:${_CRTDIR}/lib/x86 -Xlinker /libpath:${_UCRTDIR}/lib -Xlinker /libpath:${_PSDKDIR}/lib")
endforeach()

# Remove fluff libraries; projects should specify them
set(CMAKE_C_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)
set(CMAKE_CXX_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)

# Run this once after you call project() to replace broken
macro(xp_init)
	foreach(lang C CXX)
		# have to patch the link commands to replace /MANIFEST:EMBED with /MANIFEST:NO
		# because ....
		set(CMAKE_${lang}_CREATE_SHARED_LIBRARY
	"<CMAKE_${lang}_COMPILER> -nostartfiles -nostdlib <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -o <TARGET> ${CMAKE_GNULD_IMAGE_VERSION} -Xlinker /MANIFEST:EMBED -Xlinker /implib:<TARGET_IMPLIB> -Xlinker /pdb:<TARGET_PDB> -Xlinker /version:${CMAKE_SYSTEM_VERSION} <OBJECTS> <LINK_LIBRARIES> <MANIFESTS>" CACHE STRING "" FORCE)
	set(CMAKE_${lang}_CREATE_SHARED_MODULE ${CMAKE_${lang}_CREATE_SHARED_LIBRARY} CACHE STRING "")
		set(CMAKE_${lang}_LINK_EXECUTABLE
	"<CMAKE_${lang}_COMPILER> -nostartfiles -nostdlib <FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> -Xlinker /MANIFEST:NO -Xlinker /implib:<TARGET_IMPLIB> -Xlinker /pdb:<TARGET_PDB> -Xlinker /version:${CMAKE_SYSTEM_VERSION} ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES> <MANIFESTS>" CACHE STRING "" FORCE)

		# also patch these so we can set the subsytem version
		set(CMAKE_${lang}_CREATE_WIN32_EXE "-Xlinker /subsystem:windows,${CMAKE_SYSTEM_VERSION}" CACHE STRING "")
		set(CMAKE_${lang}_CREATE_CONSOLE_EXE "-Xlinker /subsystem:console,${CMAKE_SYSTEM_VERSION}" CACHE STRING "")
	endforeach()
endmacro()