# Works the same as find_package, but forwards the "REQUIRED" and "QUIET" arguments
# used for the current package. For this to work, the first parameter must be the
# prefix of the current package, then the prefix of the new package etc, which are
# passed to find_package.
macro(libfind_package PREFIX)
    set(LIBFIND_PACKAGE_ARGS ${ARGN})
    if(${PREFIX}_FIND_QUIETLY)
        set(LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} QUIET)
    endif(${PREFIX}_FIND_QUIETLY)
    if(${PREFIX}_FIND_REQUIRED)
        set(LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} REQUIRED)
    endif(${PREFIX}_FIND_REQUIRED)
    find_package(${LIBFIND_PACKAGE_ARGS})
endmacro(libfind_package)

# CMake developers made the UsePkgConfig system deprecated in the same release (2.6)
# where they added pkg_check_modules. Consequently I need to support both in my scripts
# to avoid those deprecated warnings. Here's a helper that does just that.
# Works identically to pkg_check_modules, except that no checks are needed prior to use.
macro(libfind_pkg_check_modules PREFIX PKGNAME)
    if(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
        include(UsePkgConfig)
        pkgconfig(${PKGNAME} ${PREFIX}_INCLUDE_DIRS ${PREFIX}_LIBRARY_DIRS
                  ${PREFIX}_LDFLAGS ${PREFIX}_CFLAGS)
    else(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
        find_package(PkgConfig)
        if(PKG_CONFIG_FOUND)
            pkg_check_modules(${PREFIX} ${PKGNAME})
        endif(PKG_CONFIG_FOUND)
    endif(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
endmacro(libfind_pkg_check_modules)

# Do the final processing once the paths have been detected.
# If include dirs are needed, ${PREFIX}_PROCESS_INCLUDES should be set to contain
# all the variables, each of which contain one include directory.
# Ditto for ${PREFIX}_PROCESS_LIBS and library files.
# Will set ${PREFIX}_FOUND, ${PREFIX}_INCLUDE_DIRS and ${PREFIX}_LIBRARIES.
# Also handles errors in case library detection was required, etc.
macro(libfind_process PREFIX)
    # Skip processing if already processed during this run
    if(NOT ${PREFIX}_FOUND)
        # Start with the assumption that the library was found
        set(${PREFIX}_FOUND TRUE)

        # Process all includes and set _FOUND to false if any are missing
        foreach(i ${${PREFIX}_PROCESS_INCLUDES})
            if(${i})
                set(${PREFIX}_INCLUDE_DIRS ${${PREFIX}_INCLUDE_DIRS} ${${i}})
                mark_as_advanced(${i})
            else(${i})
                set(${PREFIX}_FOUND FALSE)
            endif(${i})
        endforeach(i)

        # Process all libraries and set _FOUND to false if any are missing
        foreach(i ${${PREFIX}_PROCESS_LIBS})
            if(${i})
                set(${PREFIX}_LIBRARIES ${${PREFIX}_LIBRARIES} ${${i}})
                mark_as_advanced(${i})
            else(${i})
                set(${PREFIX}_FOUND FALSE)
            endif(${i})
        endforeach(i)

        # Print message and/or exit on fatal error
        if(${PREFIX}_FOUND)
            if(NOT ${PREFIX}_FIND_QUIETLY)
                message(STATUS "Found ${PREFIX} ${${PREFIX}_VERSION}")
            endif(NOT ${PREFIX}_FIND_QUIETLY)
        else(${PREFIX}_FOUND)
            if(${PREFIX}_FIND_REQUIRED)
                foreach(i ${${PREFIX}_PROCESS_INCLUDES} ${${PREFIX}_PROCESS_LIBS})
                    message("${i}=${${i}}")
                endforeach(i)
                message(
                    FATAL_ERROR
                        "Required library ${PREFIX} NOT FOUND.\nInstall the library (dev version) and try again. If the library is already installed, use ccmake to set the missing variables manually."
                )
            endif(${PREFIX}_FIND_REQUIRED)
        endif(${PREFIX}_FOUND)
    endif(NOT ${PREFIX}_FOUND)
endmacro(libfind_process)

macro(libfind_library PREFIX basename)
    set(TMP "")
    if(MSVC80)
        set(TMP -vc80)
    endif(MSVC80)
    if(MSVC90)
        set(TMP -vc90)
    endif(MSVC90)
    set(${PREFIX}_LIBNAMES ${basename}${TMP})
    if(${ARGC} GREATER 2)
        set(${PREFIX}_LIBNAMES ${basename}${TMP}-${ARGV2})
        string(REGEX REPLACE "\\." "_" TMP ${${PREFIX}_LIBNAMES})
        set(${PREFIX}_LIBNAMES ${${PREFIX}_LIBNAMES} ${TMP})
    endif(${ARGC} GREATER 2)
    find_library(
        ${PREFIX}_LIBRARY
        NAMES ${${PREFIX}_LIBNAMES}
        PATHS ${${PREFIX}_PKGCONF_LIBRARY_DIRS})
endmacro(libfind_library)
