diff options
Diffstat (limited to 'Modules/CheckLibraryExists.cmake')
| -rw-r--r-- | Modules/CheckLibraryExists.cmake | 74 |
1 files changed, 46 insertions, 28 deletions
diff --git a/Modules/CheckLibraryExists.cmake b/Modules/CheckLibraryExists.cmake index fb7d0ec01..528a45085 100644 --- a/Modules/CheckLibraryExists.cmake +++ b/Modules/CheckLibraryExists.cmake @@ -1,62 +1,80 @@ -# - Check if the function exists. +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# CheckLibraryExists +# ------------------ +# +# Check if the function exists. +# # CHECK_LIBRARY_EXISTS (LIBRARY FUNCTION LOCATION VARIABLE) # -# LIBRARY - the name of the library you are looking for -# FUNCTION - the name of the function -# LOCATION - location where the library should be found -# VARIABLE - variable to store the result +# :: # -# The following variables may be set before calling this macro to -# modify the way the check is run: +# LIBRARY - the name of the library you are looking for +# FUNCTION - the name of the function +# LOCATION - location where the library should be found +# VARIABLE - variable to store the result +# Will be created as an internal cache variable. # -# CMAKE_REQUIRED_FLAGS = string of compile command line flags -# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar) -# CMAKE_REQUIRED_LIBRARIES = list of libraries to link - -#============================================================================= -# 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.) - - +# 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_LIBRARIES = list of libraries to link +# CMAKE_REQUIRED_QUIET = execute quietly without messages macro(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE) - if("${VARIABLE}" MATCHES "^${VARIABLE}$") + if(NOT DEFINED "${VARIABLE}") set(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION "-DCHECK_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}") - message(STATUS "Looking for ${FUNCTION} in ${LIBRARY}") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${FUNCTION} in ${LIBRARY}") + endif() set(CHECK_LIBRARY_EXISTS_LIBRARIES ${LIBRARY}) if(CMAKE_REQUIRED_LIBRARIES) set(CHECK_LIBRARY_EXISTS_LIBRARIES ${CHECK_LIBRARY_EXISTS_LIBRARIES} ${CMAKE_REQUIRED_LIBRARIES}) endif() + + if(CMAKE_C_COMPILER_LOADED) + set(_cle_source ${CMAKE_ROOT}/Modules/CheckFunctionExists.c) + elseif(CMAKE_CXX_COMPILER_LOADED) + set(_cle_source ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckLibraryExists/CheckFunctionExists.cxx) + configure_file(${CMAKE_ROOT}/Modules/CheckFunctionExists.c "${_cle_source}" COPYONLY) + else() + message(FATAL_ERROR "CHECK_FUNCTION_EXISTS needs either C or CXX language enabled") + endif() + try_compile(${VARIABLE} ${CMAKE_BINARY_DIR} - ${CMAKE_ROOT}/Modules/CheckFunctionExists.c + ${_cle_source} COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} LINK_LIBRARIES ${CHECK_LIBRARY_EXISTS_LIBRARIES} CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_LIBRARY_EXISTS_DEFINITION} -DLINK_DIRECTORIES:STRING=${LOCATION} OUTPUT_VARIABLE OUTPUT) + unset(_cle_source) if(${VARIABLE}) - message(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - found") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - found") + endif() set(${VARIABLE} 1 CACHE INTERNAL "Have library ${LIBRARY}") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log "Determining if the function ${FUNCTION} exists in the ${LIBRARY} " "passed with the following output:\n" "${OUTPUT}\n\n") else() - message(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - not found") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - not found") + endif() set(${VARIABLE} "" CACHE INTERNAL "Have library ${LIBRARY}") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Determining if the function ${FUNCTION} exists in the ${LIBRARY} " |