catch2/CMake/CatchMiscFunctions.cmake

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# Copyright Catch2 Authors
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE.txt or copy at
# https://www.boost.org/LICENSE_1_0.txt)
# SPDX-License-Identifier: BSL-1.0
include(CheckCXXCompilerFlag)
function(add_cxx_flag_if_supported_to_targets flagname targets)
string(MAKE_C_IDENTIFIER ${flagname} flag_identifier )
check_cxx_compiler_flag("${flagname}" HAVE_FLAG_${flag_identifier})
if (HAVE_FLAG_${flag_identifier})
foreach(target ${targets})
target_compile_options(${target} PRIVATE ${flagname})
endforeach()
endif()
endfunction()
# Assumes that it is only called for development builds, where warnings
# and Werror is desired, so it also enables Werror.
function(add_warnings_to_targets targets)
LIST(LENGTH targets TARGETS_LEN)
# For now we just assume 2 possibilities: msvc and msvc-like compilers,
# and other.
if (MSVC)
foreach(target ${targets})
# Force MSVC to consider everything as encoded in utf-8
target_compile_options( ${target} PRIVATE /utf-8 )
# Enable Werror equivalent
if (CATCH_ENABLE_WERROR)
target_compile_options( ${target} PRIVATE /WX )
endif()
# MSVC is currently handled specially
if ( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
STRING(REGEX REPLACE "/W[0-9]" "/W4" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) # override default warning level
target_compile_options( ${target} PRIVATE /w44265 /w44061 /w44062 /w45038 )
endif()
endforeach()
endif()
if (NOT MSVC)
set(CHECKED_WARNING_FLAGS
"-Wabsolute-value"
"-Wall"
"-Wc++20-compat"
"-Wcall-to-pure-virtual-from-ctor-dtor"
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"-Wcast-align"
"-Wcatch-value"
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"-Wdangling"
"-Wdeprecated"
"-Wdeprecated-register"
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"-Wexceptions"
"-Wexit-time-destructors"
"-Wextra"
"-Wextra-semi"
"-Wfloat-equal"
"-Wglobal-constructors"
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"-Winit-self"
"-Wmisleading-indentation"
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"-Wmismatched-new-delete"
"-Wmismatched-return-types"
"-Wmismatched-tags"
"-Wmissing-braces"
"-Wmissing-declarations"
"-Wmissing-noreturn"
"-Wmissing-prototypes"
"-Wmissing-variable-declarations"
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"-Wnull-dereference"
"-Wold-style-cast"
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"-Woverloaded-virtual"
"-Wparentheses"
"-Wpedantic"
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"-Wreorder"
"-Wreturn-std-move"
"-Wshadow"
"-Wstrict-aliasing"
"-Wsuggest-destructor-override"
"-Wsuggest-override"
"-Wundef"
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"-Wuninitialized"
"-Wunneeded-internal-declaration"
"-Wunreachable-code-aggressive"
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"-Wunused"
"-Wunused-function"
"-Wunused-parameter"
"-Wvla"
"-Wweak-vtables"
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# This is a useful warning, but our tests sometimes rely on
# functions being present, but not picked (e.g. various checks
# for stringification implementation ordering).
# Ergo, we should use it every now and then, but we cannot
# enable it by default.
# "-Wunused-member-function"
)
foreach(warning ${CHECKED_WARNING_FLAGS})
add_cxx_flag_if_supported_to_targets(${warning} "${targets}")
endforeach()
if (CATCH_ENABLE_WERROR)
foreach(target ${targets})
# Enable Werror equivalent
target_compile_options( ${target} PRIVATE -Werror )
endforeach()
endif()
endif()
endfunction()
# Adds flags required for reproducible build to the target
# Currently only supports GCC and Clang
function(add_build_reproducibility_settings target)
# Make the build reproducible on versions of g++ and clang that supports -ffile-prefix-map
if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
add_cxx_flag_if_supported_to_targets("-ffile-prefix-map=${CATCH_DIR}/=" "${target}")
endif()
endfunction()