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chore: add CMake option to link with (std)c++fs

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ToruNiina 2020-08-06 16:29:24 +09:00
parent 8398b9a08b
commit 79ddcaece6
1 changed files with 38 additions and 0 deletions
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38
tests/CMakeLists.txt
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@ -150,9 +150,46 @@ find_package(Boost COMPONENTS unit_test_framework REQUIRED)
add_definitions(-DBOOST_TEST_DYN_LINK)
add_definitions(-DUNITTEST_FRAMEWORK_LIBRARY_EXIST)
# check which standard library implementation is used. If libstdc++ is used,
# it will fail to compile. It compiles if libc++ is used.
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("
#include <cstddef>
#ifdef __GLIBCXX__
static_assert(false);
#endif
int main() {
return 0;
}" TOML11_WITH_LIBCXX_LIBRARY)
# LLVM 8 requires -lc++fs if compiled with libc++ to use <filesystem>.
# LLVM 9+ does not require any special library.
# GCC 8 requires -lstdc++fs. GCC 9+ does not require it.
#
# Yes, we can check the version of the compiler used in the current build
# directly in CMake. But, in most cases, clang build uses libstdc++ as the
# standard library implementation and it makes the condition complicated.
# In many environment, the default installed C++ compiler is GCC and libstdc++
# is installed along with it. In most build on such an environment, even if we
# chose clang as the C++ compiler, still libstdc++ is used. Checking default
# gcc version makes the condition complicated.
# The purpose of this file is to compile tests. We know the environment on which
# the tests run. We can set this option and, I think, it is easier and better.
option(TOML11_REQUIRE_FILESYSTEM_LIBRARY "need to link -lstdc++fs or -lc++fs" OFF)
foreach(TEST_NAME ${TEST_NAMES})
add_executable(${TEST_NAME} ${TEST_NAME}.cpp)
target_link_libraries(${TEST_NAME} ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY} toml11::toml11)
# to compile tests with <filesystem>...
if(TOML11_REQUIRE_FILESYSTEM_LIBRARY AND ${CMAKE_CXX_STANDARD} STREQUAL "17")
if(TOML11_WITH_LIBCXX_LIBRARY)
target_link_libraries(${TEST_NAME} "c++fs")
else()
target_link_libraries(${TEST_NAME} "stdc++fs")
endif()
endif()
target_include_directories(${TEST_NAME} PRIVATE ${Boost_INCLUDE_DIRS})
if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
@ -178,6 +215,7 @@ foreach(TEST_NAME ${TEST_NAMES})
endif()
endforeach(TEST_NAME)
# this test is to check it compiles. it will not run
add_executable(test_multiple_translation_unit
test_multiple_translation_unit_1.cpp