1

# Works the same as find_package, but forwards the "REQUIRED" and "QUIET" arguments

     2

# used for the current package. For this to work, the first parameter must be the

     3

# prefix of the current package, then the prefix of the new package etc, which are

     4

# passed to find_package.

     5

macro (libfind_package PREFIX)

     6

  set (LIBFIND_PACKAGE_ARGS ${ARGN})

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  if (${PREFIX}_FIND_QUIETLY)

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    set (LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} QUIET)

     9

  endif (${PREFIX}_FIND_QUIETLY)

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  if (${PREFIX}_FIND_REQUIRED)

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    set (LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} REQUIRED)

    12

  endif (${PREFIX}_FIND_REQUIRED)

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  find_package(${LIBFIND_PACKAGE_ARGS})

    14

endmacro (libfind_package)

    15

    16

# Damn CMake developers made the UsePkgConfig system deprecated in the same release (2.6)

    17

# where they added pkg_check_modules. Consequently I need to support both in my scripts

    18

# to avoid those deprecated warnings. Here's a helper that does just that.

    19

# Works identically to pkg_check_modules, except that no checks are needed prior to use.

    20

macro (libfind_pkg_check_modules PREFIX PKGNAME)

    21

  if (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

    22

    include(UsePkgConfig)

    23

    pkgconfig(${PKGNAME} ${PREFIX}_INCLUDE_DIRS ${PREFIX}_LIBRARY_DIRS ${PREFIX}_LDFLAGS ${PREFIX}_CFLAGS)

    24

  else (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

    25

    find_package(PkgConfig)

    26

    if (PKG_CONFIG_FOUND)

    27

      pkg_check_modules(${PREFIX} ${PKGNAME})

    28

    endif (PKG_CONFIG_FOUND)

    29

  endif (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

    30

endmacro (libfind_pkg_check_modules)

    31

    32

# Do the final processing once the paths have been detected.

    33

# If include dirs are needed, ${PREFIX}_PROCESS_INCLUDES should be set to contain

    34

# all the variables, each of which contain one include directory.

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# Ditto for ${PREFIX}_PROCESS_LIBS and library files.

    36

# Will set ${PREFIX}_FOUND, ${PREFIX}_INCLUDE_DIRS and ${PREFIX}_LIBRARIES.

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# Also handles errors in case library detection was required, etc.

    38

macro (libfind_process PREFIX)

    39

  # Skip processing if already processed during this run

    40

  if (NOT ${PREFIX}_FOUND)

    41

    # Start with the assumption that the library was found

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    set (${PREFIX}_FOUND TRUE)

    43

    44

    # Process all includes and set _FOUND to false if any are missing

    45

    foreach (i ${${PREFIX}_PROCESS_INCLUDES})

    46

      if (${i})

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        set (${PREFIX}_INCLUDE_DIRS ${${PREFIX}_INCLUDE_DIRS} ${${i}})

    49

      else (${i})

    50

        set (${PREFIX}_FOUND FALSE)

    51

      endif (${i})

    52

    endforeach (i)

    53

    54

    # Process all libraries and set _FOUND to false if any are missing

    55

    foreach (i ${${PREFIX}_PROCESS_LIBS})

    56

      if (${i})

    57

        set (${PREFIX}_LIBRARIES ${${PREFIX}_LIBRARIES} ${${i}})

    59

      else (${i})

    60

        set (${PREFIX}_FOUND FALSE)

    61

      endif (${i})

    62

    endforeach (i)

    63

    64

    # Print message and/or exit on fatal error

    65

    if (${PREFIX}_FOUND)

    66

      if (NOT ${PREFIX}_FIND_QUIETLY)

    68

      endif (NOT ${PREFIX}_FIND_QUIETLY)

    69

    else (${PREFIX}_FOUND)

    70

      if (${PREFIX}_FIND_REQUIRED)

    71

        foreach (i ${${PREFIX}_PROCESS_INCLUDES} ${${PREFIX}_PROCESS_LIBS})

    72

          message("${i}=${${i}}")

    73

        endforeach (i)

    74

        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.")

    75

      endif (${PREFIX}_FIND_REQUIRED)

    76

    endif (${PREFIX}_FOUND)

    77

  endif (NOT ${PREFIX}_FOUND)

    78

endmacro (libfind_process)

    79