mirror of
https://github.com/crystalidea/qt-build-tools.git
synced 2024-11-30 07:11:59 +08:00
50 lines
1.8 KiB
CMake
50 lines
1.8 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CMakeBackwardCompatibilityCXX
|
|
-----------------------------
|
|
|
|
define a bunch of backwards compatibility variables
|
|
|
|
::
|
|
|
|
CMAKE_ANSI_CXXFLAGS - flag for ansi c++
|
|
CMAKE_HAS_ANSI_STRING_STREAM - has <strstream>
|
|
include(TestForANSIStreamHeaders)
|
|
include(CheckIncludeFileCXX)
|
|
include(TestForSTDNamespace)
|
|
include(TestForANSIForScope)
|
|
#]=======================================================================]
|
|
|
|
if(NOT CMAKE_SKIP_COMPATIBILITY_TESTS)
|
|
# check for some ANSI flags in the CXX compiler if it is not gnu
|
|
if(NOT CMAKE_COMPILER_IS_GNUCXX)
|
|
include(TestCXXAcceptsFlag)
|
|
set(CMAKE_TRY_ANSI_CXX_FLAGS "")
|
|
if(CMAKE_SYSTEM_NAME MATCHES "OSF")
|
|
set(CMAKE_TRY_ANSI_CXX_FLAGS "-std strict_ansi -nopure_cname")
|
|
endif()
|
|
# if CMAKE_TRY_ANSI_CXX_FLAGS has something in it, see
|
|
# if the compiler accepts it
|
|
if(NOT CMAKE_TRY_ANSI_CXX_FLAGS STREQUAL "")
|
|
CHECK_CXX_ACCEPTS_FLAG(${CMAKE_TRY_ANSI_CXX_FLAGS} CMAKE_CXX_ACCEPTS_FLAGS)
|
|
# if the compiler liked the flag then set CMAKE_ANSI_CXXFLAGS
|
|
# to the flag
|
|
if(CMAKE_CXX_ACCEPTS_FLAGS)
|
|
set(CMAKE_ANSI_CXXFLAGS ${CMAKE_TRY_ANSI_CXX_FLAGS} CACHE INTERNAL
|
|
"What flags are required by the c++ compiler to make it ansi." )
|
|
endif()
|
|
endif()
|
|
endif()
|
|
set(CMAKE_CXX_FLAGS_SAVE ${CMAKE_CXX_FLAGS})
|
|
string(APPEND CMAKE_CXX_FLAGS " ${CMAKE_ANSI_CXXFLAGS}")
|
|
include(TestForANSIStreamHeaders)
|
|
include(CheckIncludeFileCXX)
|
|
include(TestForSTDNamespace)
|
|
include(TestForANSIForScope)
|
|
include(TestForSSTREAM)
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_SAVE}")
|
|
endif()
|
|
|