Macros.cmake

include(CheckIncludeFile)
include(CheckFunctionExists)
include(CheckLibraryExists)
include(CheckTypeSize)

set(defines "// autogenerated by cmake macro\n\n")

macro(cm_define_project version name tarname string bugreport url package)
    set(defines ${defines} "#define PACKAGE_VERSION \"${version}\"\n\n")
    set(defines ${defines} "#define PACKAGE_NAME \"${name}\"\n\n")
    set(defines ${defines} "#define PACKAGE_TARNAME \"${tarname}\"\n\n")
    set(defines ${defines} "#define PACKAGE_STRING \"${string}\"\n\n")
    set(defines ${defines} "#define PACKAGE_BUGREPORT \"${bugreport}\"\n\n")
    set(defines ${defines} "#define PACKAGE_URL \"${url}\"\n\n")
    set(defines ${defines} "#define PACKAGE \"${package}\"\n\n")
endmacro()

macro(cm_define_var varname varvalue)
    set(defines ${defines} "#define ${varname} ${varvalue}\n\n")
endmacro()

macro(cm_check_lib libname)
    find_library(${libname}_LIBRARY ${libname})
    if(${libname}_LIBRARY)
        string(TOUPPER ${libname} libname)
        set(defines ${defines} "#cmakedefine HAVE_${libname}\n\n")
    else()
        set(defines ${defines} "/* #undef HAVE_${libname} */\n\n")
    endif()
endmacro()

macro(cm_check_include include var)
    check_include_file(${include} ${var})
    if(${var})
        set(defines ${defines} "#cmakedefine ${var}\n\n")
    else()
        set(defines ${defines} "/* #undef ${var} */\n\n")
    endif()
endmacro()

macro(cm_check_function func var)
    check_function_exists(${func} ${var})
    if(${var})
        set(defines ${defines} "#cmakedefine ${var}\n\n")
    else()
        set(defines ${defines} "/* #undef ${var} */\n\n")
    endif()
endmacro()

macro(cm_check_type_size type var)
    check_type_size(${type} ${var})
    if(${var})
        set(defines ${defines} "#cmakedefine ${var} ${${var}}\n\n")
    else()
        set(defines ${defines} "/* #undef ${var} */\n\n")
    endif()
endmacro()

macro(cm_replace_functions sources)
  foreach(name ${ARGN})
    string(TOUPPER have_${name} SYMBOL_NAME)
    cm_check_function(${name} ${SYMBOL_NAME})
    message(${defines})
    if(NOT ${SYMBOL_NAME})
      set(${sources} ${${sources}} ${name}.c)
    endif()
  endforeach()
endmacro()

set(default_conf_file "config.h.template")

macro(cm_configure_file to_file)
    file(WRITE ${default_conf_file} ${defines})
    configure_file(${default_conf_file} ${to_file})
    file(REMOVE ${default_conf_file}) # uncomment if you want to check the template
endmacro()