eden-miror/externals/cmake-modules/DetectPlatform.cmake
crueter 89f72d286a
[cmake, tools] update CPMUtil and add support for CPMUtil bundled Qt, module updates, cleanups (#3289)
Support for bundled Qt, not through aqtinstall but rather my CI. Multimedia is
implemented too, works on both Windows and Linux, though we don't
actually use it so it doesn't really matter. Contains Declarative and all that so the Quick frontend will work once it becomes a thing.

Some options have changed, notably w.r.t LTO and faster
linker, which are now handled directly in the modules.

CPMUtil also has support for custom dirs (`PackageName_CUSTOM_DIR`) now. Probably most useful for adding external fragment shaders and whatnot.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3289
2026-01-14 19:29:13 +01:00

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CMake

# SPDX-FileCopyrightText: Copyright 2025 crueter
# SPDX-License-Identifier: LGPL-3.0-or-later
## DetectPlatform ##
# This is a small helper that sets PLATFORM_<platform> variables for various
# operating systems and distributions. Note that Apple, Windows, Android, etc.
# are not covered, as CMake already does that for us.
# It also sets CXX_<compiler> for the C++ compiler.
# Furthermore, some platforms have really silly requirements/quirks, so this
# also does a few of those.
# This module contains contributions from the Eden Emulator Project,
# notably from crueter and Lizzie.
if (${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
set(PLATFORM_SUN ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
set(PLATFORM_FREEBSD ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
set(PLATFORM_OPENBSD ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "NetBSD")
set(PLATFORM_NETBSD ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "DragonFly")
set(PLATFORM_DRAGONFLYBSD ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Haiku")
set(PLATFORM_HAIKU ON)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
set(PLATFORM_LINUX ON)
endif()
# dumb heuristic to detect msys2
if (CMAKE_COMMAND MATCHES "msys64")
set(PLATFORM_MSYS ON)
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
set(CXX_CLANG ON)
if (MSVC)
set(CXX_CLANG_CL ON)
endif()
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(CXX_GCC ON)
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CXX_CL ON)
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
set(CXX_ICC ON)
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
set(CXX_APPLE ON)
endif()
# https://gitlab.kitware.com/cmake/cmake/-/merge_requests/11112
# This works totally fine on MinGW64, but not CLANG{,ARM}64
if(MINGW AND CXX_CLANG)
set(CMAKE_SYSTEM_VERSION 10.0.0)
endif()
# NB: this does not account for SPARC
if (PLATFORM_SUN)
# Terrific OpenIndiana pkg shenanigans
list(APPEND CMAKE_PREFIX_PATH
"${CMAKE_SYSROOT}/usr/lib/qt/6.6/lib/amd64/cmake")
list(APPEND CMAKE_MODULE_PATH
"${CMAKE_SYSROOT}/usr/lib/qt/6.6/lib/amd64/cmake")
# Amazing - absolutely incredible
list(APPEND CMAKE_PREFIX_PATH "${CMAKE_SYSROOT}/usr/lib/amd64/cmake")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SYSROOT}/usr/lib/amd64/cmake")
# For some mighty reason, doing a normal release build sometimes
# may not trigger the proper -O3 switch to materialize
if (CMAKE_BUILD_TYPE MATCHES "Release")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
endif()
if (CMAKE_BUILD_TYPE MATCHES "RelWithDebInfo")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
endif()
endif()
# MSYS2 utilities
# Sometimes, PkgConfig modules will incorrectly reference / when CMake
# wants you to reference it as C:/msys64/. This function corrects that.
# Example in a Find module:
#[[
if (PLATFORM_MSYS)
FixMsysPath(PkgConfig::OPUS)
endif()
]]
function(FixMsysPath target)
get_target_property(include_dir ${target} INTERFACE_INCLUDE_DIRECTORIES)
if (NOT (include_dir MATCHES "^/"))
return()
endif()
set(root_default $ENV{MSYS2_LOCATION})
if (root_default STREQUAL "")
set(root_default "C:/msys64")
endif()
set(MSYS_ROOT_PATH ${root_default}
CACHE STRING "Location of the MSYS2 root")
set(include_dir "C:/msys64${include_dir}")
set_target_properties(${target} PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${include_dir})
endfunction()
# MSYSTEM handling + program_path
if (PLATFORM_MSYS)
# really, really dumb heuristic to detect what environment we are in
macro(system var)
if (CMAKE_COMMAND MATCHES ${var})
set(MSYSTEM ${var})
endif()
endmacro()
system(mingw64)
system(clang64)
system(clangarm64)
system(ucrt64)
if (NOT DEFINED MSYSTEM)
set(MSYSTEM msys2)
endif()
# We generally want to prioritize environment-specific binaries if possible
# some, like autoconf, are not present on environments besides msys2 though
set(CMAKE_PROGRAM_PATH C:/msys64/${MSYSTEM}/bin C:/msys64/usr/bin)
set(ENV{PKG_CONFIG_PATH} C:/msys64/${MSYSTEM}/lib/pkgconfig)
endif()
# This saves a truly ridiculous amount of time during linking
# In my tests, without this, Eden takes 2 mins, with this, it takes 3-5 seconds
# or on GitHub Actions, 10 minutes -> 3 seconds
if (MINGW)
set(MINGW_FLAGS "-Wl,--strip-all -Wl,--gc-sections")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE
"${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${MINGW_FLAGS}")
endif()
# awesome
if (PLATFORM_FREEBSD OR PLATFORM_DRAGONFLYBSD)
set(CMAKE_EXE_LINKER_FLAGS
"${CMAKE_EXE_LINKER_FLAGS} -L${CMAKE_SYSROOT}/usr/local/lib")
endif()