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Improve project C++17 support (#4334)

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Poco now use C++17. We can take some old code away because of that. We
also raise requiments for C++17 so everything works as excpected with
it.

Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>
This commit is contained in:
Kari Argillander
2023-12-13 03:16:35 +02:00
committed by GitHub
parent 12a99dcd18
commit 10f41c06d9
6 changed files with 5 additions and 37 deletions
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25
cmake/CXX1x.cmake
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@@ -18,31 +18,6 @@
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# Determines whether the compiler supports C++11
macro(check_for_cxx11_compiler _VAR)
message(STATUS "Checking for C++11 compiler ...")
set(${_VAR})
try_compile(_COMPILER_TEST_RESULT ${PROJECT_BINARY_DIR} ${PROJECT_SOURCE_DIR}/cmake/test_compiler.cpp CMAKE_FLAGS -DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_STANDARD_REQUIRED=ON)
if(NOT _COMPILER_TEST_RESULT AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
try_compile(_COMPILER_TEST_RESULT ${PROJECT_BINARY_DIR} ${PROJECT_SOURCE_DIR}/cmake/test_compiler.cpp CMAKE_FLAGS -DCMAKE_CXX_FLAGS="-stdlib=libc++" -DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_STANDARD_REQUIRED=ON)
if(_COMPILER_TEST_RESULT)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
else()
message(STATUS "To enable C++11 install libc++ standard library from https://libcxx.llvm.org/")
endif()
endif()
if(_COMPILER_TEST_RESULT AND ((MSVC AND (MSVC10 OR MSVC11 OR MSVC12 OR MSVC14)) OR
(CMAKE_COMPILER_IS_GNUCXX AND NOT ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 4.8.1) OR
(CMAKE_CXX_COMPILER_ID STREQUAL "QCC" AND NOT ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 4.8.1) OR
(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 3.3) OR
(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")))
set(${_VAR} 1)
message(STATUS "Checking for C++11 compiler - available")
else()
message(STATUS "Checking for C++11 compiler - unavailable")
endif()
endmacro()
# Determines whether the compiler supports C++17
macro(check_for_cxx17_compiler _VAR)
message(STATUS "Checking for C++17 compiler")