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124 lines
3.8 KiB
124 lines
3.8 KiB
# SPDX-FileCopyrightText: Copyright 2026 crueter
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# SPDX-License-Identifier: LGPL-3.0-or-later
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## DetectPlatform ##
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# This is a small helper that sets platform variables for various
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# operating systems and distributions. Note that Apple, Windows, Android, etc.
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# are not covered, as CMake already does that for us.
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# It also sets CXX_<compiler> for the C++ compiler.
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# This module contains contributions from the Eden Emulator Project,
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# notably from crueter and Lizzie.
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if (${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
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set(SOLARIS ON)
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elseif (${CMAKE_SYSTEM_NAME} STREQUAL "OpenOrbis")
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set(OPENORBIS ON)
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elseif (${CMAKE_SYSTEM_NAME} STREQUAL "managarm")
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set(MANAGARM ON)
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elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Haiku")
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set(HAIKUOS ON)
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elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Emscripten")
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set(EMSCRIPTEN ON)
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message(WARNING "${CMAKE_LIBRARY_ARCHITECTURE} support is highly experimental!!!")
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endif()
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# BSD
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if (DEFINED BSD)
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if ("${BSD}" STREQUAL "DragonFlyBSD")
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set(DRAGONFLYBSD ON)
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elseif ("${BSD}" STREQUAL "FreeBSD")
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set(FREEBSD ON)
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elseif ("${BSD}" STREQUAL "OpenBSD")
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set(OPENBSD ON)
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elseif ("${BSD}" STREQUAL "NetBSD")
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set(NETBSD ON)
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endif()
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endif()
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# dumb heuristic to detect msys2
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if (CMAKE_COMMAND MATCHES "msys64")
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set(MSYS2 ON)
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endif()
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# compiler checks
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if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
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set(CXX_CLANG ON)
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if (MSVC)
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set(CXX_CLANG_CL ON)
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endif()
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elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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set(CXX_GCC ON)
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elseif (CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
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set(CXX_ICC ON)
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elseif (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
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set(CXX_APPLE ON)
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endif()
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# https://gitlab.kitware.com/cmake/cmake/-/merge_requests/11112
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# This works totally fine on MinGW64, but not CLANG{,ARM}64
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if(MINGW AND CXX_CLANG)
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set(CMAKE_SYSTEM_VERSION 10.0.0)
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endif()
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# MSYS2 utilities
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# Sometimes, PkgConfig modules will incorrectly reference / when CMake
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# wants you to reference it as C:/msys64/. This function corrects that.
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# Example in a Find module:
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#[[
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if (MSYS2)
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FixMsysPath(PkgConfig::OPUS)
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endif()
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]]
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function(FixMsysPath target)
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get_target_property(include_dir ${target} INTERFACE_INCLUDE_DIRECTORIES)
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if (NOT (include_dir MATCHES "^/"))
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return()
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endif()
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set(root_default $ENV{MSYS2_LOCATION})
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if (root_default STREQUAL "")
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set(root_default "C:/msys64")
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endif()
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set(MSYS_ROOT_PATH ${root_default}
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CACHE STRING "Location of the MSYS2 root")
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set(include_dir "C:/msys64${include_dir}")
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set_target_properties(${target} PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES ${include_dir})
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endfunction()
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# Saves linking time
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if (MINGW)
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set(MINGW_FLAGS "-Wl,--strip-all -Wl,--gc-sections")
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set(CMAKE_EXE_LINKER_FLAGS_RELEASE
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"${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${MINGW_FLAGS}")
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endif()
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if (PLATFORM_EMSCRIPTEN)
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set(EMSCRIPTEN_C_FLAGS "-s MEMORY64 -m64 -pipe -sMEMORY64=1")
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set(EMSCRIPTEN_LINK_FLAGS "-sMEMORY64=1 -m64 -Wl,-mwasm64 -sASYNCIFY=1")
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# This prevents FFmpeg and other libraries from assuming it's the host's CPU
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# Additionally some Emscripten installs may not be very good... generally
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set(EMSCRIPTEN_SYSTEM_PROCESSOR wasm)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EMSCRIPTEN_C_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} ${EMSCRIPTEN_C_FLAGS}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
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set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
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set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
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unset(EMSCRIPTEN_C_FLAGS)
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unset(EMSCRIPTEN_LINK_FLAGS)
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endif()
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# awesome
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if (PLATFORM_FREEBSD OR PLATFORM_DRAGONFLYBSD)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L${CMAKE_SYSROOT}/usr/local/lib")
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endif()
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