# 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)