CMake/Modules/CheckCXXSourceRuns.cmake
Alex Neundorf 35c48e1270 Check*.cmake: Expand imported targets in CMAKE_REQUIRED_LIBRARIES
Add the function cmake_expand_imported_targets() to expand imported
targets in a list of libraries into their on-disk file names for a
particular configuration.  Adapt the implementation from KDE's
HANDLE_IMPORTED_TARGETS_IN_CMAKE_REQUIRED_LIBRARIES which has been in
use for over 2 years.  Call the function from all the Check*.cmake
macros to handle imported targets named in CMAKE_REQUIRED_LIBRARIES.

Alex
2012-02-21 15:38:15 -05:00

92 lines
4.2 KiB
CMake

# - Check if the given C++ source code compiles and runs.
# CHECK_CXX_SOURCE_RUNS(<code> <var>)
# <code> - source code to try to compile
# <var> - variable to store the result
# (1 for success, empty for failure)
# 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
#=============================================================================
# Copyright 2006-2009 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.)
INCLUDE("${CMAKE_CURRENT_LIST_DIR}/CMakeExpandImportedTargets.cmake")
MACRO(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
IF("${VAR}" MATCHES "^${VAR}$")
SET(MACRO_CHECK_FUNCTION_DEFINITIONS
"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
IF(CMAKE_REQUIRED_LIBRARIES)
# this one translates potentially used imported library targets to their files on disk
CMAKE_EXPAND_IMPORTED_TARGETS(_ADJUSTED_CMAKE_REQUIRED_LIBRARIES LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}")
SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES
"-DLINK_LIBRARIES:STRING=${_ADJUSTED_CMAKE_REQUIRED_LIBRARIES}")
ELSE(CMAKE_REQUIRED_LIBRARIES)
SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES)
ENDIF(CMAKE_REQUIRED_LIBRARIES)
IF(CMAKE_REQUIRED_INCLUDES)
SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES
"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
ELSE(CMAKE_REQUIRED_INCLUDES)
SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES)
ENDIF(CMAKE_REQUIRED_INCLUDES)
FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx"
"${SOURCE}\n")
MESSAGE(STATUS "Performing Test ${VAR}")
TRY_RUN(${VAR}_EXITCODE ${VAR}_COMPILED
${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
-DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
"${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}"
"${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
COMPILE_OUTPUT_VARIABLE OUTPUT)
# if it did not compile make the return value fail code of 1
IF(NOT ${VAR}_COMPILED)
SET(${VAR}_EXITCODE 1)
ENDIF(NOT ${VAR}_COMPILED)
# if the return value was 0 then it worked
IF("${${VAR}_EXITCODE}" EQUAL 0)
SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
MESSAGE(STATUS "Performing Test ${VAR} - Success")
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Performing C++ SOURCE FILE Test ${VAR} succeded with the following output:\n"
"${OUTPUT}\n"
"Return value: ${${VAR}}\n"
"Source file was:\n${SOURCE}\n")
ELSE("${${VAR}_EXITCODE}" EQUAL 0)
IF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
SET(${VAR} "${${VAR}_EXITCODE}")
ELSE(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
ENDIF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
MESSAGE(STATUS "Performing Test ${VAR} - Failed")
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n"
"${OUTPUT}\n"
"Return value: ${${VAR}_EXITCODE}\n"
"Source file was:\n${SOURCE}\n")
ENDIF("${${VAR}_EXITCODE}" EQUAL 0)
ENDIF("${VAR}" MATCHES "^${VAR}$")
ENDMACRO(CHECK_CXX_SOURCE_RUNS)