You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.4 KiB
101 lines
3.4 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#.rst:
|
|
# CheckCXXSourceCompiles
|
|
# ----------------------
|
|
#
|
|
# Check if given C++ source compiles and links into an executable
|
|
#
|
|
# CHECK_CXX_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>])
|
|
#
|
|
# ::
|
|
#
|
|
# <code> - source code to try to compile, must define 'main'
|
|
# <var> - variable to store whether the source code compiled
|
|
# Will be created as an internal cache variable.
|
|
# <fail-regex> - fail if test output matches this regex
|
|
#
|
|
# The following variables may be set before calling this macro to modify
|
|
# the way the check is run:
|
|
#
|
|
# ::
|
|
#
|
|
# CMAKE_REQUIRED_FLAGS = string of compile command line flags
|
|
# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
|
|
# CMAKE_REQUIRED_INCLUDES = list of include directories
|
|
# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
|
|
# CMAKE_REQUIRED_QUIET = execute quietly without messages
|
|
|
|
macro(CHECK_CXX_SOURCE_COMPILES SOURCE VAR)
|
|
if(NOT DEFINED "${VAR}")
|
|
set(_FAIL_REGEX)
|
|
set(_key)
|
|
foreach(arg ${ARGN})
|
|
if("${arg}" MATCHES "^(FAIL_REGEX)$")
|
|
set(_key "${arg}")
|
|
elseif(_key)
|
|
list(APPEND _${_key} "${arg}")
|
|
else()
|
|
message(FATAL_ERROR "Unknown argument:\n ${arg}\n")
|
|
endif()
|
|
endforeach()
|
|
|
|
set(MACRO_CHECK_FUNCTION_DEFINITIONS
|
|
"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
|
|
if(CMAKE_REQUIRED_LIBRARIES)
|
|
set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES
|
|
LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
|
|
else()
|
|
set(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES)
|
|
endif()
|
|
if(CMAKE_REQUIRED_INCLUDES)
|
|
set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES
|
|
"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
|
|
else()
|
|
set(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES)
|
|
endif()
|
|
file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx"
|
|
"${SOURCE}\n")
|
|
|
|
if(NOT CMAKE_REQUIRED_QUIET)
|
|
message(STATUS "Performing Test ${VAR}")
|
|
endif()
|
|
try_compile(${VAR}
|
|
${CMAKE_BINARY_DIR}
|
|
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx
|
|
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
|
|
${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}
|
|
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
|
|
"${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
|
|
OUTPUT_VARIABLE OUTPUT)
|
|
|
|
foreach(_regex ${_FAIL_REGEX})
|
|
if("${OUTPUT}" MATCHES "${_regex}")
|
|
set(${VAR} 0)
|
|
endif()
|
|
endforeach()
|
|
|
|
if(${VAR})
|
|
set(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
|
|
if(NOT CMAKE_REQUIRED_QUIET)
|
|
message(STATUS "Performing Test ${VAR} - Success")
|
|
endif()
|
|
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
|
|
"Performing C++ SOURCE FILE Test ${VAR} succeeded with the following output:\n"
|
|
"${OUTPUT}\n"
|
|
"Source file was:\n${SOURCE}\n")
|
|
else()
|
|
if(NOT CMAKE_REQUIRED_QUIET)
|
|
message(STATUS "Performing Test ${VAR} - Failed")
|
|
endif()
|
|
set(${VAR} "" CACHE INTERNAL "Test ${VAR}")
|
|
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
|
|
"Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n"
|
|
"${OUTPUT}\n"
|
|
"Source file was:\n${SOURCE}\n")
|
|
endif()
|
|
endif()
|
|
endmacro()
|
|
|