Port yuzu-emu/yuzu#2253: "Migrate off directly modifying CMAKE_* compilation-related flags directly" (#4714)

* CMakeLists: Move compilation flags into the src directory

We generally shouldn't be hijacking CMAKE_CXX_FLAGS, etc as a means to
append flags to the targets, since this adds the compilation flags to
everything, including our externals, which can result in weird issues
and makes the build hierarchy fragile.

Instead, we want to just apply these compilation flags to our targets,
and let those managing external libraries to properly specify their
compilation flags.

This also results in us not getting as many warnings, as we don't raise
the warning level on every external target.

* CMakeLists: Move off of modifying CMAKE_*-related flags

Modifying CMAKE_* related flags directly applies those changes to every
single CMake target. This includes even the targets we have in the
externals directory.

So, if we ever increased our warning levels, or enabled particular ones,
or enabled any other compilation setting, then this would apply to
externals as well, which is often not desirable.

This makes our compilation flag setup less error prone by only applying
our settings to our targets and leaving the externals alone entirely.

This also means we don't end up clobbering any provided flags on the
command line either, allowing users to specifically use the flags they
want.
This commit is contained in:
Tobias 2019-06-18 12:12:32 +02:00 committed by GitHub
parent 73bf92fb3a
commit a11bc03d4a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 72 additions and 82 deletions

View File

@ -102,7 +102,7 @@ endif()
message(STATUS "Target architecture: ${ARCHITECTURE}")
# Configure compilation flags
# Configure C++ standard
# ===========================
set(CMAKE_CXX_STANDARD 17)
@ -112,75 +112,6 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
if (NOT MSVC)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-attributes")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
if (MINGW)
add_definitions(-DMINGW_HAS_SECURE_API)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gdwarf")
if (MINGW_STATIC_BUILD)
add_definitions(-DQT_STATICPLUGIN)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
endif()
endif()
else()
# Silence "deprecation" warnings
add_definitions(/D_CRT_SECURE_NO_WARNINGS /D_CRT_NONSTDC_NO_DEPRECATE /D_SCL_SECURE_NO_WARNINGS)
# Avoid windows.h junk
add_definitions(/DNOMINMAX)
# Avoid windows.h from including some usually unused libs like winsocks.h, since this might cause some redefinition errors.
add_definitions(/DWIN32_LEAN_AND_MEAN)
set(CMAKE_CONFIGURATION_TYPES Debug Release CACHE STRING "" FORCE)
# Tweak optimization settings
# As far as I can tell, there's no way to override the CMake defaults while leaving user
# changes intact, so we'll just clobber everything and say sorry.
message(STATUS "Cache compiler flags ignored, please edit CMakeLists.txt to change the flags.")
# /W3 - Level 3 warnings
# /MP - Multi-threaded compilation
# /Zi - Output debugging information
# /Zo - enhanced debug info for optimized builds
# /permissive- - enables stricter C++ standards conformance checks
set(CMAKE_C_FLAGS "/W3 /MP /Zi /Zo /permissive-" CACHE STRING "" FORCE)
# /EHsc - C++-only exception handling semantics
# /std:c++latest - Latest available C++ standard
# /Zc:throwingNew - let codegen assume `operator new` will never return null
# /Zc:inline - let codegen omit inline functions in object files
set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} /EHsc /std:c++latest /Zc:throwingNew,inline" CACHE STRING "" FORCE)
# /MDd - Multi-threaded Debug Runtime DLL
set(CMAKE_C_FLAGS_DEBUG "/Od /MDd" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}" CACHE STRING "" FORCE)
# /O2 - Optimization level 2
# /GS- - No stack buffer overflow checks
# /MD - Multi-threaded runtime DLL
set(CMAKE_C_FLAGS_RELEASE "/O2 /GS- /MD" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}" CACHE STRING "" FORCE)
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/DEBUG /MANIFEST:NO" CACHE STRING "" FORCE)
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/DEBUG /MANIFEST:NO /INCREMENTAL:NO /OPT:REF,ICF" CACHE STRING "" FORCE)
endif()
# Set file offset size to 64 bits.
#
# On modern Unixes, this is typically already the case. The lone exception is
# glibc, which may default to 32 bits. glibc allows this to be configured
# by setting _FILE_OFFSET_BITS.
if(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR MINGW)
add_definitions(-D_FILE_OFFSET_BITS=64)
endif()
add_definitions(-DSINGLETHREADED)
# CMake seems to only define _DEBUG on Windows
set_property(DIRECTORY APPEND PROPERTY
COMPILE_DEFINITIONS $<$<CONFIG:Debug>:_DEBUG> $<$<NOT:$<CONFIG:Debug>>:NDEBUG>)
# System imported libraries
# ======================
@ -283,25 +214,21 @@ endif()
# Platform-specific library requirements
# ======================================
IF (APPLE)
find_library(COCOA_LIBRARY Cocoa) # Umbrella framework for everything GUI-related
if (APPLE)
# Umbrella framework for everything GUI-related
find_library(COCOA_LIBRARY Cocoa)
set(PLATFORM_LIBRARIES ${COCOA_LIBRARY} ${IOKIT_LIBRARY} ${COREVIDEO_LIBRARY})
if (CMAKE_CXX_COMPILER_ID STREQUAL Clang)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++")
endif()
ELSEIF (WIN32)
elseif (WIN32)
# WSAPoll and SHGetKnownFolderPath (AppData/Roaming) didn't exist before WinNT 6.x (Vista)
add_definitions(-D_WIN32_WINNT=0x0600 -DWINVER=0x0600)
set(PLATFORM_LIBRARIES winmm ws2_32)
IF (MINGW)
if (MINGW)
# PSAPI is the Process Status API
set(PLATFORM_LIBRARIES ${PLATFORM_LIBRARIES} psapi imm32 version)
ENDIF (MINGW)
ELSEIF (CMAKE_SYSTEM_NAME MATCHES "^(Linux|kFreeBSD|GNU|SunOS)$")
endif()
elseif (CMAKE_SYSTEM_NAME MATCHES "^(Linux|kFreeBSD|GNU|SunOS)$")
set(PLATFORM_LIBRARIES rt)
ENDIF (APPLE)
endif()
# Setup a custom clang-format target (if clang-format can be found) that will run
# against all the src files. This should be used before making a pull request.

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@ -1,6 +1,66 @@
# Enable modules to include each other's files
include_directories(.)
# CMake seems to only define _DEBUG on Windows
set_property(DIRECTORY APPEND PROPERTY
COMPILE_DEFINITIONS $<$<CONFIG:Debug>:_DEBUG> $<$<NOT:$<CONFIG:Debug>>:NDEBUG>)
# Set compilation flags
if (MSVC)
set(CMAKE_CONFIGURATION_TYPES Debug Release CACHE STRING "" FORCE)
# Silence "deprecation" warnings
add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS)
# Avoid windows.h junk
add_definitions(-DNOMINMAX)
# Avoid windows.h from including some usually unused libs like winsocks.h, since this might cause some redefinition errors.
add_definitions(-DWIN32_LEAN_AND_MEAN)
# /W3 - Level 3 warnings
# /MP - Multi-threaded compilation
# /Zi - Output debugging information
# /Zo - enhanced debug info for optimized builds
# /permissive- - enables stricter C++ standards conformance checks
# /EHsc - C++-only exception handling semantics
# /std:c++latest - Latest available C++ standard
# /Zc:throwingNew - let codegen assume `operator new` will never return null
# /Zc:inline - let codegen omit inline functions in object files
add_compile_options(/W3 /MP /Zi /Zo /permissive- /EHsc /std:c++latest /Zc:throwingNew,inline)
# /GS- - No stack buffer overflow checks
add_compile_options("$<$<CONFIG:Release>:/GS->")
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/DEBUG /MANIFEST:NO" CACHE STRING "" FORCE)
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/DEBUG /MANIFEST:NO /INCREMENTAL:NO /OPT:REF,ICF" CACHE STRING "" FORCE)
else()
add_compile_options("-Wno-attributes")
if (APPLE AND CMAKE_CXX_COMPILER_ID STREQUAL Clang)
add_compile_options("-stdlib=libc++")
endif()
# Set file offset size to 64 bits.
#
# On modern Unixes, this is typically already the case. The lone exception is
# glibc, which may default to 32 bits. glibc allows this to be configured
# by setting _FILE_OFFSET_BITS.
if(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR MINGW)
add_definitions(-D_FILE_OFFSET_BITS=64)
endif()
if (MINGW)
add_definitions(-DMINGW_HAS_SECURE_API)
add_compile_options("-gdwarf")
if (MINGW_STATIC_BUILD)
add_definitions(-DQT_STATICPLUGIN)
add_compile_options("-static")
endif()
endif()
endif()
add_subdirectory(common)
add_subdirectory(core)
add_subdirectory(video_core)
@ -8,9 +68,11 @@ add_subdirectory(audio_core)
add_subdirectory(network)
add_subdirectory(input_common)
add_subdirectory(tests)
if (ENABLE_SDL2)
add_subdirectory(citra)
endif()
if (ENABLE_QT)
add_subdirectory(citra_qt)
endif()
@ -19,6 +81,7 @@ if (ANDROID)
else()
add_subdirectory(dedicated_room)
endif()
if (ENABLE_WEB_SERVICE)
add_subdirectory(web_service)
endif()