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include(CompileCheck)
option(DEBUG_EXTRA "Expensive debug options" OFF)
option(SET_WARNING_FLAGS "Adjust compiler warning flags" ON)
option(SET_OPTIMIZATION_FLAGS "Adjust compiler optimization flags" ON)
if(CMAKE_BUILD_TYPE STREQUAL "")
set(CMAKE_BUILD_TYPE "Release")
endif()
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
add_definitions(-DDEBUG)
set(DEBUG 1)
endif()
if(MSVC)
if(SET_WARNING_FLAGS)
add_definitions(/wd4996) # 'unsafe' stdlib functions used by Boost
endif()
else(MSVC)
if(SET_WARNING_FLAGS)
# GCC (and compatible)
add_cxxflag("-Wall")
add_cxxflag("-Wextra")
add_cxxflag("-Wformat=2")
add_cxxflag("-Wundef")
add_cxxflag("-Wpointer-arith")
add_cxxflag("-Wcast-qual")
add_cxxflag("-Woverloaded-virtual")
add_cxxflag("-Wlogical-op")
add_cxxflag("-Woverflow")
add_cxxflag("-Wconversion")
add_cxxflag("-Wsign-conversion")
add_cxxflag("-Wmissing-declarations")
add_cxxflag("-Wredundant-decls")
# clang
add_cxxflag("-Wliteral-conversion")
add_cxxflag("-Wshift-overflow")
add_cxxflag("-Wbool-conversions")
# icc
if(NOT DEBUG_EXTRA)
add_cxxflag("-wd1418") # 'external function definition with no prior declaration'
endif()
endif(SET_WARNING_FLAGS)
if(DEBUG_EXTRA)
add_cxxflag("-ftrapv") # to add checks for (undefined) signed integer overflow
add_cxxflag("-fbounds-checking")
add_cxxflag("-fcatch-undefined-behavior")
add_cxxflag("-Wstrict-aliasing=1")
endif(DEBUG_EXTRA)
if(SET_OPTIMIZATION_FLAGS)
# Link as few libraries as possible
# This is much easier than trying to decide which libraries are needed for each system
# Specifically, the need for libboost_system depends on the Boost version
add_ldflag("-Wl,--as-needed")
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
# set debug symbol level to -g3
check_compiler_flag(RESULT "-g3")
if(NOT RESULT STREQUAL "")
string(REGEX REPLACE "-g(|[0-9]|gdb)" "" CMAKE_CXX_FLAGS_DEBUG
"${CMAKE_CXX_FLAGS_DEBUG}")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${RESULT}")
endif()
# disable optimizations
check_compiler_flag(RESULT "-O0")
string(REGEX REPLACE "-O[0-9]" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${RESULT}")
endif()
endif(SET_OPTIMIZATION_FLAGS)
endif(MSVC)
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