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CompilerFlags.cmake
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CompilerFlags.cmake
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# SPDX-License-Identifier: Apache-2.0
#
# Copyright (C) 2023 The Falco Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
#
option(BUILD_WARNINGS_AS_ERRORS "Enable building with -Wextra -Werror flags")
option(ENABLE_PIC "Build position independent libraries and executables" ${BUILD_SHARED_LIBS})
if(ENABLE_PIC)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
endif()
# NOTE: do not add `add_definition` in this file because consumers project won't import it.
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_EXTENSIONS OFF)
set(FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS "")
set(FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS "")
if(NOT MSVC)
set(FALCOSECURITY_LIBS_COMMON_FLAGS "-Wall -ggdb")
set(FALCOSECURITY_LIBS_DEBUG_FLAGS "-Og -D_DEBUG")
set(FALCOSECURITY_LIBS_RELEASE_FLAGS "-O3 -fno-strict-aliasing -DNDEBUG")
if(MINIMAL_BUILD)
set(FALCOSECURITY_LIBS_COMMON_FLAGS "${FALCOSECURITY_LIBS_COMMON_FLAGS} -DMINIMAL_BUILD")
endif()
if(MUSL_OPTIMIZED_BUILD)
set(FALCOSECURITY_LIBS_COMMON_FLAGS "${FALCOSECURITY_LIBS_COMMON_FLAGS} -static -Os")
endif()
if(BUILD_WARNINGS_AS_ERRORS)
set(CMAKE_COMPILE_WARNING_AS_ERROR ON)
set(CMAKE_SUPPRESSED_WARNINGS "-Wno-unused-parameter -Wno-sign-compare -Wno-implicit-fallthrough -Wno-format-truncation")
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
# Clang needs these for suppressing these warnings:
# - C++20 array designators used with C++17
# - C99 array designators used in C++
# - avoid complaining about the option above `-Wno-format-truncation`
set(CMAKE_SUPPRESSED_WARNINGS "${CMAKE_SUPPRESSED_WARNINGS} -Wno-c++20-designator -Wno-c99-designator -Wno-unknown-warning-option")
endif()
set(FALCOSECURITY_LIBS_COMMON_FLAGS "${FALCOSECURITY_LIBS_COMMON_FLAGS} -Werror -Wextra ${CMAKE_SUPPRESSED_WARNINGS}")
endif()
if(USE_ASAN)
set(FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS};-fsanitize=address")
set(FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS};-fsanitize=address;-lpthread")
endif()
if(USE_UBSAN)
set(FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS};-fsanitize=undefined")
set(FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS};-fsanitize=undefined")
if(UBSAN_HALT_ON_ERROR)
set(FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS};-fno-sanitize-recover=undefined")
endif()
endif()
if(ENABLE_COVERAGE)
set(FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS};--coverage")
set(FALCOSECURITY_LIBS_USERSPACE_LINK_FLAGS "${FALCOSECURITY_LIBS_USERSPACE_COMPILE_FLAGS};--coverage")
endif()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${FALCOSECURITY_LIBS_COMMON_FLAGS}")
# we need also `-std=c++17` here beacuse `set(CMAKE_CXX_STANDARD 17)` is not enough to enforce c++17
# with some Cmake versions: https://github.com/falcosecurity/libs/pull/950
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FALCOSECURITY_LIBS_COMMON_FLAGS} -std=c++17")
set(CMAKE_C_FLAGS_DEBUG "${FALCOSECURITY_LIBS_DEBUG_FLAGS}")
set(CMAKE_CXX_FLAGS_DEBUG "${FALCOSECURITY_LIBS_DEBUG_FLAGS}")
set(CMAKE_C_FLAGS_RELEASE "${FALCOSECURITY_LIBS_RELEASE_FLAGS}")
set(CMAKE_CXX_FLAGS_RELEASE "${FALCOSECURITY_LIBS_RELEASE_FLAGS}")
add_definitions(-D__STDC_FORMAT_MACROS)
else() # MSVC
set(MINIMAL_BUILD ON)
set(FALCOSECURITY_LIBS_COMMON_FLAGS "-D_CRT_SECURE_NO_WARNINGS -DWIN32 -DMINIMAL_BUILD /EHsc /W3 /Zi /std:c++17")
if(CMAKE_VERSION VERSION_LESS 3.15.0)
set(FALCOSECURITY_LIBS_DEBUG_FLAGS "/MTd /Od")
set(FALCOSECURITY_LIBS_RELEASE_FLAGS "/MT")
else()
# /MT vs /MD should be determined via CMAKE_MSVC_RUNTIME_LIBRARY
set(FALCOSECURITY_LIBS_DEBUG_FLAGS "/Od")
endif()
set(CMAKE_C_FLAGS "${FALCOSECURITY_LIBS_COMMON_FLAGS}")
set(CMAKE_CXX_FLAGS "${FALCOSECURITY_LIBS_COMMON_FLAGS}")
set(CMAKE_C_FLAGS_DEBUG "${FALCOSECURITY_LIBS_DEBUG_FLAGS}")
set(CMAKE_CXX_FLAGS_DEBUG "${FALCOSECURITY_LIBS_DEBUG_FLAGS}")
set(CMAKE_C_FLAGS_RELEASE "${FALCOSECURITY_LIBS_RELEASE_FLAGS}")
set(CMAKE_CXX_FLAGS_RELEASE "${FALCOSECURITY_LIBS_RELEASE_FLAGS}")
# "_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR" enables a
# workaround for windows GH runner issue, see
# https://github.com/actions/runner-images/issues/10004
add_compile_definitions(
_HAS_STD_BYTE=0
WIN32_LEAN_AND_MEAN
_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR
)
endif()