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Copy pathCMakeLists.txt
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77 lines (65 loc) · 3.5 KB
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cmake_minimum_required (VERSION 3.5)
project (simplecpp LANGUAGES CXX)
option(DISABLE_CPP03_SYNTAX_CHECK "Disable the C++03 syntax check." OFF)
include(CheckCXXCompilerFlag)
if (WIN32)
# prevent simplifyPath_cppcheck() from wasting time on looking for a hypothetical network host
add_definitions(-DUNCHOST=$ENV{COMPUTERNAME})
endif()
function(add_compile_options_safe FLAG)
string(MAKE_C_IDENTIFIER "HAS_CXX_FLAG${FLAG}" mangled_flag)
check_cxx_compiler_flag(${FLAG} ${mangled_flag})
if (${mangled_flag})
add_compile_options(${FLAG})
endif()
endfunction()
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
add_compile_options(-Wall -Wextra -pedantic -Wcast-qual -Wfloat-equal -Wmissing-declarations -Wmissing-format-attribute -Wredundant-decls -Wshadow -Wundef -Wold-style-cast -Wno-multichar)
elseif (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
add_compile_options(-Weverything)
# no need for c++98 compatibility
add_compile_options(-Wno-c++98-compat-pedantic)
# these are not really fixable
add_compile_options(-Wno-exit-time-destructors -Wno-global-constructors -Wno-weak-vtables)
add_compile_options_safe(-Wno-unsafe-buffer-usage)
# we are not interested in these
add_compile_options(-Wno-multichar -Wno-four-char-constants)
# ignore C++11-specific warning
add_compile_options(-Wno-suggest-override -Wno-suggest-destructor-override)
# contradicts -Wcovered-switch-default
add_compile_options(-Wno-switch-default)
# TODO: fix these?
add_compile_options(-Wno-padded -Wno-sign-conversion -Wno-implicit-int-conversion -Wno-shorten-64-to-32 -Wno-shadow-field-in-constructor)
if (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 14 OR CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 14)
# TODO: verify this regression still exists in clang-15
if (CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
# work around performance regression - see https://github.com/llvm/llvm-project/issues/53555
add_compile_options(-mllvm -inline-deferral)
endif()
# use force DWARF 4 debug format since not all tools might be able to handle DWARF 5 yet - e.g. valgrind on ubuntu 20.04
add_compile_options(-gdwarf-4)
endif()
endif()
add_library(simplecpp_obj OBJECT simplecpp.cpp)
add_executable(simplecpp $<TARGET_OBJECTS:simplecpp_obj> main.cpp)
set_property(TARGET simplecpp PROPERTY CXX_STANDARD 11)
if (NOT DISABLE_CPP03_SYNTAX_CHECK)
# it is not possible to set a standard older than C++14 with Visual Studio
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
# we need to create a dummy library as -fsyntax-only will not produce any output files causing the build to fail
add_library(simplecpp-03-syntax OBJECT simplecpp.cpp)
target_compile_options(simplecpp-03-syntax PRIVATE -std=c++03)
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
target_compile_options(simplecpp-03-syntax PRIVATE -Wno-long-long)
elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
target_compile_options(simplecpp-03-syntax PRIVATE -Wno-c++11-long-long -Wno-c++11-compat)
endif()
add_dependencies(simplecpp simplecpp-03-syntax)
endif()
endif()
add_executable(testrunner $<TARGET_OBJECTS:simplecpp_obj> test.cpp)
set_property(TARGET testrunner PROPERTY CXX_STANDARD 11)
enable_testing()
add_test(NAME testrunner COMMAND testrunner)