https://github.com/Kitware/CMake
Revision 46d9006efa2f2f009121a09a39976ec37f052dde authored by Brad King on 31 March 2020, 14:33:01 UTC, committed by Brad King on 31 March 2020, 14:35:56 UTC
Since commit b0f46c48f6 (CompileFeatures: Now able to presume full language level support, 2019-03-06, v3.15.0-rc1~265^2~1) we pretend that the XL compiler has full C++11 and C++14 support so that projects specifying granular features will at least get the corresponding compiler mode. This is a work around for our lack of a full feature check table for this compiler that works in common cases. Add a comment explaining this. Issue: #20521
1 parent 4aaa9ea
Tip revision: 46d9006efa2f2f009121a09a39976ec37f052dde authored by Brad King on 31 March 2020, 14:33:01 UTC
XL: Add comment clarifying why we pretend it has full C++11/14 support
XL: Add comment clarifying why we pretend it has full C++11/14 support
Tip revision: 46d9006
CompileFlags.cmake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#-----------------------------------------------------------------------------
# set some special flags for different compilers
#
if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Intel")
set(_INTEL_WINDOWS 1)
endif()
if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Clang"
AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
set(_CLANG_MSVC_WINDOWS 1)
endif()
# Disable deprecation warnings for standard C functions.
# really only needed for newer versions of VS, but should
# not hurt other versions, and this will work into the
# future
if(MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
else()
endif()
if(MSVC)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
endif()
if(_CLANG_MSVC_WINDOWS AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
endif()
#silence duplicate symbol warnings on AIX
if(CMAKE_SYSTEM_NAME MATCHES "AIX")
if(NOT CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -bhalt:5 ")
endif()
endif()
if(CMAKE_SYSTEM MATCHES "OSF1-V")
if(NOT CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -timplicit_local -no_implicit_include ")
endif()
endif()
# Workaround for short jump tables on PA-RISC
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc")
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mlong-calls")
endif()
if(CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mlong-calls")
endif()
endif()
# Workaround for TOC Overflow on ppc64
set(bigTocFlag "")
if(CMAKE_SYSTEM_NAME STREQUAL "AIX" AND
CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc")
set(bigTocFlag "-Wl,-bbigtoc")
elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND
CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
set(bigTocFlag "-Wl,--no-multi-toc")
endif()
if(bigTocFlag)
include(CheckCXXLinkerFlag)
check_cxx_linker_flag(${bigTocFlag} BIG_TOC_FLAG_SUPPORTED)
if(BIG_TOC_FLAG_SUPPORTED)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${bigTocFlag}")
endif()
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL SunPro AND
NOT DEFINED CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION)
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13)
if (NOT CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD EQUAL 98)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
elseif(CMAKE_VERSION VERSION_LESS 3.8.20170502)
# CMake knows how to add this flag for compilation as C++11,
# but has not been taught that SunPro needs it for linking too.
# Add it in a place that will be used for both.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -library=stlport4")
endif()
endif()
foreach(lang C CXX)
# Suppress warnings from PGI compiler.
if (CMAKE_${lang}_COMPILER_ID STREQUAL "PGI")
set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -w")
endif()
endforeach()
# use the ansi CXX compile flag for building cmake
if (CMAKE_ANSI_CXXFLAGS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_ANSI_CXXFLAGS}")
endif ()
if (CMAKE_ANSI_CFLAGS)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
endif ()
# Allow per-translation-unit parallel builds when using MSVC
if(CMAKE_GENERATOR MATCHES "Visual Studio" AND
(CMAKE_C_COMPILER_ID MATCHES "MSVC|Intel" OR
CMAKE_CXX_COMPILER_ID MATCHES "MSVC|Intel"))
set(CMake_MSVC_PARALLEL ON CACHE STRING "\
Enables /MP flag for parallel builds using MSVC. Specify an \
integer value to control the number of threads used (Only \
works on some older versions of Visual Studio). Setting to \
ON lets the toolchain decide how many threads to use. Set to \
OFF to disable /MP completely." )
if(CMake_MSVC_PARALLEL)
if(CMake_MSVC_PARALLEL GREATER 0)
string(APPEND CMAKE_C_FLAGS " /MP${CMake_MSVC_PARALLEL}")
string(APPEND CMAKE_CXX_FLAGS " /MP${CMake_MSVC_PARALLEL}")
else()
string(APPEND CMAKE_C_FLAGS " /MP")
string(APPEND CMAKE_CXX_FLAGS " /MP")
endif()
endif()
endif()
Computing file changes ...