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include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
# CMake < 3.21 only goes up to 11, but it's mostly identical to 17 anyway.
if(${CMAKE_VERSION} VERSION_LESS "3.21.0")
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
else()
set(CMAKE_C_STANDARD 17)
set(CMAKE_C_STANDARD_REQUIRED ON)
endif()
# TODO/FIXME: Investigate disabling C extensions on Linux/POSIX
if(OS_MACOS OR NOT OS_POSIX)
set(CMAKE_C_EXTENSIONS OFF)
endif()
# Set compile options for MSVC
if(OS_WINDOWS AND MSVC)
if(NOT EXISTS "${CMAKE_BINARY_DIR}/ALL_BUILD.vcxproj.user")
file(
GENERATE
OUTPUT "${CMAKE_BINARY_DIR}/ALL_BUILD.vcxproj.user"
INPUT "${CMAKE_SOURCE_DIR}/cmake/bundle/windows/ALL_BUILD.vcxproj.user.in")
endif()
# CMake 3.24 introduces a bug mistakenly interpreting MSVC as supporting `-pthread`
if(${CMAKE_VERSION} VERSION_EQUAL "3.24.0")
set(THREADS_HAVE_PTHREAD_ARG OFF)
endif()
# Check for Win SDK version 10.0.20348 or above
obs_status(STATUS "Windows API version is ${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}")
string(REPLACE "." ";" WINAPI_VER "${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}")
list(GET WINAPI_VER 0 WINAPI_VER_MAJOR)
list(GET WINAPI_VER 1 WINAPI_VER_MINOR)
list(GET WINAPI_VER 2 WINAPI_VER_BUILD)
set(WINAPI_COMPATIBLE FALSE)
if(WINAPI_VER_MAJOR EQUAL 10)
if(WINAPI_VER_MINOR EQUAL 0)
if(WINAPI_VER_BUILD GREATER_EQUAL 20348)
set(WINAPI_COMPATIBLE TRUE)
endif()
else()
set(WINAPI_COMPATIBLE TRUE)
endif()
elseif(WINAPI_VER_MAJOR GREATER 10)
set(WINAPI_COMPATIBLE TRUE)
endif()
if(NOT WINAPI_COMPATIBLE)
obs_status(FATAL_ERROR "OBS requires Windows 10 SDK version 10.0.20348.0 and above to compile.\n"
"Please download the most recent Windows 10 SDK in order to compile.")
endif()
add_compile_options(
/Brepro
/MP
/W3
/WX
/wd4127
/wd4201
/wd4456
/wd4457
/wd4458
/wd4459
/wd4595
"$<$<CONFIG:DEBUG>:/DDEBUG=1;/D_DEBUG=1>"
"$<$<CONFIG:RELWITHDEBINFO>:/Ob2>"
/DUNICODE
/D_UNICODE
/D_CRT_SECURE_NO_WARNINGS
/D_CRT_NONSTDC_NO_WARNINGS
/utf-8
/permissive-
/Zc:__cplusplus
/Zc:preprocessor)
add_link_options(
"LINKER:/Brepro" "LINKER:/OPT:REF" "LINKER:/WX" "$<$<NOT:$<EQUAL:${CMAKE_SIZEOF_VOID_P},8>>:LINKER\:/SAFESEH\:NO>"
"$<$<CONFIG:DEBUG>:LINKER\:/INCREMENTAL\:NO>" "$<$<CONFIG:RELWITHDEBINFO>:LINKER\:/INCREMENTAL\:NO;/OPT:ICF>")
else()
find_program(CCACHE_PROGRAM "ccache")
set(CCACHE_SUPPORT
ON
CACHE BOOL "Enable ccache support")
mark_as_advanced(CCACHE_PROGRAM)
if(CCACHE_PROGRAM AND CCACHE_SUPPORT)
set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
set(CMAKE_OBJC_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
set(CMAKE_OBJCXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
set(CMAKE_CUDA_COMPILER_LAUNCHER "${CCACHE_PROGRAM}") # CMake 3.9+
endif()
option(CALM_DEPRECATION "Keep deprecated-declarations as warnings" OFF)
#[[
Note about -Wmaybe-uninitialized on GCC, this warning seems to be subject of various regressions and false positives. This
warning is set to not turn into an error.
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105562 for 12.1.0
- https://github.com/obsproject/obs-studio/issues/8850 for 13.1.1
]]
add_compile_options(
#-Werror
-Wextra
-Wvla
-Wswitch
-Wno-error=switch
-Wformat
-Wformat-security
-Wunused-parameter
-Wno-unused-function
-Wno-missing-field-initializers
-fno-strict-aliasing
"$<$<COMPILE_LANGUAGE:C>:-Werror-implicit-function-declaration;-Wno-missing-braces>"
"$<$<BOOL:${USE_LIBCXX}>:-stdlib=libc++>"
"$<$<CONFIG:DEBUG>:-DDEBUG=1;-D_DEBUG=1>"
"$<$<COMPILE_LANG_AND_ID:CXX,AppleClang,Clang>:-Wnull-conversion;-fcolor-diagnostics;-Wno-error=shorten-64-to-32>"
"$<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wnull-conversion;-fcolor-diagnostics;-Wno-error=shorten-64-to-32>"
"$<$<COMPILE_LANG_AND_ID:CXX,GNU>:-Wconversion-null;-Wno-error=maybe-uninitialized>"
"$<$<COMPILE_LANG_AND_ID:C,GNU>:-Wno-error=maybe-uninitialized>"
"$<$<BOOL:${CALM_DEPRECATION}>:-Wno-error=deprecated-declarations>")
# GCC on aarch64 emits type-limits warnings that do not appear on x86_64
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
add_compile_options(-Wno-error=type-limits)
endif()
if(OBS_CODESIGN_LINKER)
add_link_options("LINKER:$<$<PLATFORM_ID:Darwin>:-adhoc_codesign>")
endif()
if(MINGW)
set(CMAKE_WIDL
"widl"
CACHE INTERNAL "wine IDL header file generation program")
add_compile_definitions("_WIN32_WINNT=0x0600;WINVER=0x0600")
endif()
endif()
if(MSVC_CXX_ARCHITECTURE_ID)
string(TOLOWER ${MSVC_CXX_ARCHITECTURE_ID} LOWERCASE_CMAKE_SYSTEM_PROCESSOR)
else()
string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} LOWERCASE_CMAKE_SYSTEM_PROCESSOR)
endif()
option(ENABLE_SIMD "Enable guessing of SIMD flags" ON)
if(ENABLE_SIMD)
if(LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "(i[3-6]86|x86|x64|x86_64|amd64|e2k)")
if(NOT MSVC AND NOT CMAKE_OSX_ARCHITECTURES STREQUAL "arm64")
set(ARCH_SIMD_FLAGS -mmmx -msse -msse2)
endif()
elseif(LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64(le)?")
set(ARCH_SIMD_DEFINES -DNO_WARN_X86_INTRINSICS)
set(ARCH_SIMD_FLAGS -mvsx)
else()
if(CMAKE_C_COMPILER_ID MATCHES "^(Apple)?Clang|GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "^(Apple)?Clang|GNU")
check_c_compiler_flag("-fopenmp-simd" C_COMPILER_SUPPORTS_OPENMP_SIMD)
check_cxx_compiler_flag("-fopenmp-simd" CXX_COMPILER_SUPPORTS_OPENMP_SIMD)
set(ARCH_SIMD_FLAGS
-DSIMDE_ENABLE_OPENMP "$<$<AND:$<COMPILE_LANGUAGE:C>,$<BOOL:C_COMPILER_SUPPORTS_OPENMP_SIMD>>:-fopenmp-simd>"
"$<$<AND:$<COMPILE_LANGUAGE:CXX>,$<BOOL:CXX_COMPILER_SUPPORTS_OPENMP_SIMD>>:-fopenmp-simd>")
endif()
endif()
endif(ENABLE_SIMD)
if(LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "e2k")
foreach(
TEST_C_FLAG
"-Wno-unused-parameter"
"-Wno-ignored-qualifiers"
"-Wno-pointer-sign"
"-Wno-unused-variable"
"-Wno-sign-compare"
"-Wno-bad-return-value-type"
"-Wno-maybe-uninitialized")
check_c_compiler_flag(${TEST_C_FLAG} C_COMPILER_SUPPORTS_FLAG_${TEST_C_FLAG})
if(C_COMPILER_SUPPORTS_FLAG_${TEST_C_FLAG})
set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} ${TEST_C_FLAG})
endif()
endforeach()
foreach(TEST_CXX_FLAG "-Wno-invalid-offsetof" "-Wno-maybe-uninitialized")
check_cxx_compiler_flag(${TEST_CXX_FLAG} CXX_COMPILER_SUPPORTS_FLAG_${TEST_CXX_FLAG})
if(CXX_COMPILER_SUPPORTS_FLAG_${TEST_CXX_FLAG})
set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} ${TEST_CXX_FLAG})
endif()
endforeach()
endif()
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