mirror of https://github.com/ZDoom/fluidsynth.git
76 lines
3.4 KiB
CMake
76 lines
3.4 KiB
CMake
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# - Check if the DIR symbol exists like in AC_HEADER_DIRENT.
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# CHECK_DIRSYMBOL_EXISTS(FILES VARIABLE)
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#
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# FILES - include files to check
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# VARIABLE - variable to return result
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#
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# This module is a small but important variation on CheckSymbolExists.cmake.
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# The symbol always searched for is DIR, and the test programme follows
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# the AC_HEADER_DIRENT test programme rather than the CheckSymbolExists.cmake
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# test programme which always fails since DIR tends to be typedef'd
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# rather than #define'd.
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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(CHECK_DIRSYMBOL_EXISTS FILES VARIABLE)
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IF(NOT DEFINED ${VARIABLE})
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SET(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n")
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SET(MACRO_CHECK_DIRSYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_DIRSYMBOL_EXISTS_LIBS
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ELSE(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_DIRSYMBOL_EXISTS_LIBS)
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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IF(CMAKE_REQUIRED_INCLUDES)
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SET(CMAKE_DIRSYMBOL_EXISTS_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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ELSE(CMAKE_REQUIRED_INCLUDES)
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SET(CMAKE_DIRSYMBOL_EXISTS_INCLUDES)
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ENDIF(CMAKE_REQUIRED_INCLUDES)
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FOREACH(FILE ${FILES})
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SET(CMAKE_CONFIGURABLE_FILE_CONTENT
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}#include <${FILE}>\n")
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ENDFOREACH(FILE)
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SET(CMAKE_CONFIGURABLE_FILE_CONTENT
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\nint main()\n{if ((DIR *) 0) return 0;}\n")
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CONFIGURE_FILE("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
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"${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckDIRSymbolExists.c" @ONLY)
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MESSAGE(STATUS "Looking for DIR in ${FILES}")
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TRY_COMPILE(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckDIRSymbolExists.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_DIRSYMBOL_EXISTS_FLAGS}
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"${CHECK_DIRSYMBOL_EXISTS_LIBS}"
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"${CMAKE_DIRSYMBOL_EXISTS_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(${VARIABLE})
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MESSAGE(STATUS "Looking for DIR in ${FILES} - found")
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SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol DIR")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
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"Determining if the DIR symbol is defined as in AC_HEADER_DIRENT "
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"passed with the following output:\n"
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"${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckDIRSymbolExists.c:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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ELSE(${VARIABLE})
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MESSAGE(STATUS "Looking for DIR in ${FILES} - not found.")
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SET(${VARIABLE} "" CACHE INTERNAL "Have symbol DIR")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
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"Determining if the DIR symbol is defined as in AC_HEADER_DIRENT "
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"failed with the following output:\n"
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"${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckDIRSymbolExists.c:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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ENDIF(${VARIABLE})
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ENDIF(NOT DEFINED ${VARIABLE})
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ENDMACRO(CHECK_DIRSYMBOL_EXISTS)
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