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compilerSetup.cmake
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# Copyright (c) 2017
# Commonwealth Scientific and Industrial Research Organisation (CSIRO)
# ABN 41 687 119 230
#
# Author: Kazys Stepanas
# Configure compiler warnings depending on the current compiler.
#-------------------------------------------------------------------------------
# Configure warnings for gcc.
#-------------------------------------------------------------------------------
macro(warnings_gcc)
add_compile_options(
"-pedantic"
"-Wall"
"-Wextra"
"-Wconversion"
"-Werror=pedantic"
"-Werror=vla"
)
endmacro(warnings_gcc)
#-------------------------------------------------------------------------------
# Configure for apple clang.
#-------------------------------------------------------------------------------
macro(setup_apple_clang)
warnings_gcc()
# Disable precedence warning of && and || in if statements:
# && === *
# || === +
add_compile_options(
"-Wno-logical-op-parentheses"
)
endmacro(setup_apple_clang)
#-------------------------------------------------------------------------------
# Configure for GCC
#-------------------------------------------------------------------------------
macro(setup_gcc)
warnings_gcc()
endmacro(setup_gcc)
#-------------------------------------------------------------------------------
# Configure for MSVC
#-------------------------------------------------------------------------------
macro(setup_msvc)
# For Visual Studio, force PDB based debug information even in release builds.
# This has a small impact on the size of the of the DLLs, but provides debug information for release mode crashes.
# The PDBs can be kept for debugging specific releases, but do not need to be shipped as part of the runtime, unless
# shipping an SDK. The last point is to address MSVC linked warnings which are impossible to suppress without providing
# PDB files.
# Enable multi processor compilation
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Zi")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /Zi")
set(CMAKE_MODULE_LINKER_FLAGS_RELEASE "/debug ${CMAKE_MODULE_LINKER_FLAGS_RELEASE}")
set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "/debug ${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/debug ${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
# Level 3 warnings by default is fine. May go to level 4.
# Enable multi-processor project compilation.
option(COMPILER_MULTI_PROCESSOR "Use multiple processor compilation (MSVC)?" ON)
if(COMPILER_MULTI_PROCESSOR)
add_compile_options("/MP")
endif(COMPILER_MULTI_PROCESSOR)
endmacro(setup_msvc)
#-------------------------------------------------------------------------------
# Select the correct warnings configuration.
#-------------------------------------------------------------------------------
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
# using Apple Clang (MacOS)
setup_apple_clang()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
# using GCC
setup_gcc()
# elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
# # using Intel C++
elseif (MSVC)
# using Visual Studio C++
setup_msvc()
else()
message("Unknown compiler ${CMAKE_CXX_COMPILER_ID}. Unable to configure warnings.")
endif()