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CMake/Modules/CMakeDetermineCXXCompiler.cmake
Kitware Robot 9db3116226 Remove CMake-language block-end command arguments 
Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block.  This is no longer the preferred style.

Run the following shell code:

for c in else endif endforeach endfunction endmacro endwhile; do
    echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
2012-08-13 14:19:16 -04:00

187 lines
7.1 KiB
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#=============================================================================
# Copyright 2002-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
# determine the compiler to use for C++ programs
# NOTE, a generator may set CMAKE_CXX_COMPILER before
# loading this file to force a compiler.
# use environment variable CXX first if defined by user, next use
# the cmake variable CMAKE_GENERATOR_CXX which can be defined by a generator
# as a default compiler
# If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used
# as prefix for the tools (e.g. arm-elf-g++, arm-elf-ar etc.)
#
# Sets the following variables:
# CMAKE_CXX_COMPILER
# CMAKE_COMPILER_IS_GNUCXX
# CMAKE_AR
# CMAKE_RANLIB
#
# If not already set before, it also sets
# _CMAKE_TOOLCHAIN_PREFIX
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)
# Load system-specific compiler preferences for this language.
include(Platform/${CMAKE_SYSTEM_NAME}-CXX OPTIONAL)
if(NOT CMAKE_CXX_COMPILER_NAMES)
set(CMAKE_CXX_COMPILER_NAMES CC)
endif()
if(NOT CMAKE_CXX_COMPILER)
set(CMAKE_CXX_COMPILER_INIT NOTFOUND)
# prefer the environment variable CXX
if($ENV{CXX} MATCHES ".+")
get_filename_component(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT)
if(CMAKE_CXX_FLAGS_ENV_INIT)
set(CMAKE_CXX_COMPILER_ARG1 "${CMAKE_CXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to CXX compiler")
endif()
if(NOT EXISTS ${CMAKE_CXX_COMPILER_INIT})
message(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}")
endif()
endif()
# next prefer the generator specified compiler
if(CMAKE_GENERATOR_CXX)
if(NOT CMAKE_CXX_COMPILER_INIT)
set(CMAKE_CXX_COMPILER_INIT ${CMAKE_GENERATOR_CXX})
endif()
endif()
# finally list compilers to try
if(NOT CMAKE_CXX_COMPILER_INIT)
set(CMAKE_CXX_COMPILER_LIST CC ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ aCC cl bcc xlC clang++)
endif()
_cmake_find_compiler(CXX)
else()
# we only get here if CMAKE_CXX_COMPILER was specified using -D or a pre-made CMakeCache.txt
# (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE
#
# if CMAKE_CXX_COMPILER is a list of length 2, use the first item as
# CMAKE_CXX_COMPILER and the 2nd one as CMAKE_CXX_COMPILER_ARG1
list(LENGTH CMAKE_CXX_COMPILER _CMAKE_CXX_COMPILER_LIST_LENGTH)
if("${_CMAKE_CXX_COMPILER_LIST_LENGTH}" EQUAL 2)
list(GET CMAKE_CXX_COMPILER 1 CMAKE_CXX_COMPILER_ARG1)
list(GET CMAKE_CXX_COMPILER 0 CMAKE_CXX_COMPILER)
endif()
# if a compiler was specified by the user but without path,
# now try to find it with the full path
# if it is found, force it into the cache,
# if not, don't overwrite the setting (which was given by the user) with "NOTFOUND"
# if the CXX compiler already had a path, reuse it for searching the C compiler
get_filename_component(_CMAKE_USER_CXX_COMPILER_PATH "${CMAKE_CXX_COMPILER}" PATH)
if(NOT _CMAKE_USER_CXX_COMPILER_PATH)
find_program(CMAKE_CXX_COMPILER_WITH_PATH NAMES ${CMAKE_CXX_COMPILER})
mark_as_advanced(CMAKE_CXX_COMPILER_WITH_PATH)
if(CMAKE_CXX_COMPILER_WITH_PATH)
set(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER_WITH_PATH} CACHE STRING "CXX compiler" FORCE)
endif()
endif()
endif()
mark_as_advanced(CMAKE_CXX_COMPILER)
if (NOT _CMAKE_TOOLCHAIN_LOCATION)
get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_CXX_COMPILER}" PATH)
endif ()
# This block was used before the compiler was identified by building a
# source file. Unless g++ crashes when building a small C++
# executable this should no longer be needed.
#
# The g++ that comes with BeOS 5 segfaults if you run "g++ -E"
# ("gcc -E" is fine), which throws up a system dialog box that hangs cmake
# until the user clicks "OK"...so for now, we just assume it's g++.
# if(BEOS)
# set(CMAKE_COMPILER_IS_GNUCXX 1)
# set(CMAKE_COMPILER_IS_GNUCXX_RUN 1)
# endif()
# Build a small source file to identify the compiler.
if(${CMAKE_GENERATOR} MATCHES "Visual Studio")
set(CMAKE_CXX_COMPILER_ID_RUN 1)
set(CMAKE_CXX_PLATFORM_ID "Windows")
set(CMAKE_CXX_COMPILER_ID "MSVC")
endif()
if(NOT CMAKE_CXX_COMPILER_ID_RUN)
set(CMAKE_CXX_COMPILER_ID_RUN 1)
# Each entry in this list is a set of extra flags to try
# adding to the compile line to see if it helps produce
# a valid identification file.
set(CMAKE_CXX_COMPILER_ID_TEST_FLAGS
# Try compiling to an object file only.
"-c"
)
# Try to identify the compiler.
set(CMAKE_CXX_COMPILER_ID)
file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in
CMAKE_CXX_COMPILER_ID_PLATFORM_CONTENT)
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
CMAKE_DETERMINE_COMPILER_ID(CXX CXXFLAGS CMakeCXXCompilerId.cpp)
# Set old compiler and platform id variables.
if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
set(CMAKE_COMPILER_IS_GNUCXX 1)
endif()
if("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW")
set(CMAKE_COMPILER_IS_MINGW 1)
elseif("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin")
set(CMAKE_COMPILER_IS_CYGWIN 1)
endif()
endif()
# if we have a g++ cross compiler, they have usually some prefix, like
# e.g. powerpc-linux-g++, arm-elf-g++ or i586-mingw32msvc-g++ , optionally
# with a 3-component version number at the end (e.g. arm-eabi-gcc-4.5.2).
# The other tools of the toolchain usually have the same prefix
# NAME_WE cannot be used since then this test will fail for names lile
# "arm-unknown-nto-qnx6.3.0-gcc.exe", where BASENAME would be
# "arm-unknown-nto-qnx6" instead of the correct "arm-unknown-nto-qnx6.3.0-"
if (CMAKE_CROSSCOMPILING
AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU"
AND NOT _CMAKE_TOOLCHAIN_PREFIX)
get_filename_component(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME)
if (COMPILER_BASENAME MATCHES "^(.+-)[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$")
set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1})
endif ()
# if "llvm-" is part of the prefix, remove it, since llvm doesn't have its own binutils
# but uses the regular ar, objcopy, etc. (instead of llvm-objcopy etc.)
if ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$")
set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1})
endif ()
endif (CMAKE_CROSSCOMPILING
AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU"
AND NOT _CMAKE_TOOLCHAIN_PREFIX)
include(${CMAKE_ROOT}/Modules/CMakeClDeps.cmake)
include(CMakeFindBinUtils)
if(MSVC_CXX_ARCHITECTURE_ID)
set(SET_MSVC_CXX_ARCHITECTURE_ID
"set(MSVC_CXX_ARCHITECTURE_ID ${MSVC_CXX_ARCHITECTURE_ID})")
endif()
# configure all variables set in this file
configure_file(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake
@ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
)
set(CMAKE_CXX_COMPILER_ENV_VAR "CXX")
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