72 lines
2.9 KiB
CMake
72 lines
2.9 KiB
CMake
# - Check if the source code provided in the SOURCE argument compiles.
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# CURL_CHECK_C_SOURCE_COMPILES(SOURCE VAR)
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# - macro which checks if the source code compiles
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# SOURCE - source code to try to compile
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# VAR - variable to store whether the source code compiled
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#
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# The following variables may be set before calling this macro to
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# modify the way the check is run:
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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macro(CURL_CHECK_C_SOURCE_COMPILES SOURCE VAR)
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if("${VAR}" MATCHES "^${VAR}$" OR "${VAR}" MATCHES "UNKNOWN")
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set(message "${VAR}")
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# If the number of arguments is greater than 2 (SOURCE VAR)
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if(${ARGC} GREATER 2)
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# then add the third argument as a message
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set(message "${ARGV2} (${VAR})")
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endif()
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set(MACRO_CHECK_FUNCTION_DEFINITIONS
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"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
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if(CMAKE_REQUIRED_LIBRARIES)
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set(CURL_CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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endif()
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if(CMAKE_REQUIRED_INCLUDES)
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set(CURL_CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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endif()
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set(src "")
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foreach(def ${EXTRA_DEFINES})
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set(src "${src}#define ${def} 1\n")
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endforeach(def)
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foreach(inc ${HEADER_INCLUDES})
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set(src "${src}#include <${inc}>\n")
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endforeach(inc)
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set(src "${src}\nint main() { ${SOURCE} ; return 0; }")
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set(CMAKE_CONFIGURABLE_FILE_CONTENT "${src}")
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CMake/CMakeConfigurableFile.in
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
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IMMEDIATE)
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message(STATUS "Performing Test ${message}")
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try_compile(${VAR}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
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"${CURL_CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
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"${CURL_CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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if(${VAR})
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set(${VAR} 1 CACHE INTERNAL "Test ${message}")
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message(STATUS "Performing Test ${message} - Success")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Performing C SOURCE FILE Test ${message} succeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${src}\n")
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else()
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message(STATUS "Performing Test ${message} - Failed")
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set(${VAR} "" CACHE INTERNAL "Test ${message}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Performing C SOURCE FILE Test ${message} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${src}\n")
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endif()
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endif()
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endmacro()
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