FindDeflate.cmake

FindDeflate.cmake

# file Copyright.txt or https://cmake.org/licensing for details. source:
# https://github.com/OSGeo/gdal/blob/master/cmake/modules/packages/FindDeflate.cmake
#[=======================================================================[.rst:
 FindDeflate
 --------

 Find the native Deflate includes and library.

 IMPORTED Targets
 ^^^^^^^^^^^^^^^^

 This module defines :prop_tgt:`IMPORTED` target ``Deflate::Deflate``, if
 Deflate has been found.

 Result Variables
 ^^^^^^^^^^^^^^^^

 This module defines the following variables:

 ::

   Deflate_INCLUDE_DIRS   - where to find deflate.h, etc.
   Deflate_LIBRARIES      - List of libraries when using deflate.
   Deflate_FOUND          - True if deflate found.

 ::

   Deflate_VERSION_STRING - The version of deflate found (x.y.z)
   Deflate_VERSION_MAJOR  - The major version of deflate
   Deflate_VERSION_MINOR  - The minor version of deflate

   Debug and Release variants are found separately.
 #]=======================================================================]

# Standard names to search for
set(Deflate_NAMES deflate deflatestatic)
set(Deflate_NAMES_DEBUG deflated deflatestaticd)

find_path(
  Deflate_INCLUDE_DIR
  NAMES libdeflate.h
  PATH_SUFFIXES include
)

set(Deflate_OLD_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
# Library has a "lib" prefix even on Windows.
set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")

# Allow Deflate_LIBRARY to be set manually, as the location of the deflate library
if(NOT Deflate_LIBRARY)
  find_library(
    Deflate_LIBRARY_RELEASE
    NAMES ${Deflate_NAMES}
    PATH_SUFFIXES lib
  )
  find_library(
    Deflate_LIBRARY_DEBUG
    NAMES ${Deflate_NAMES_DEBUG}
    PATH_SUFFIXES lib
  )

  include(SelectLibraryConfigurations)
  select_library_configurations(Deflate)
endif()

set(CMAKE_FIND_LIBRARY_PREFIXES "${Deflate_OLD_FIND_LIBRARY_PREFIXES}")

unset(Deflate_NAMES)
unset(Deflate_NAMES_DEBUG)
unset(Deflate_OLD_FIND_LIBRARY_PREFIXES)

mark_as_advanced(Deflate_INCLUDE_DIR)

if(Deflate_INCLUDE_DIR AND EXISTS "${Deflate_INCLUDE_DIR}/deflate.h")
  file(STRINGS "${Deflate_INCLUDE_DIR}/libdeflate.h" Deflate_H
       REGEX "^#define LIBDEFLATE_VERSION_STRING\s+\"[^\"]*\"$"
  )

  string(REGEX REPLACE "^.*Deflate_VERSION \"([0-9]+).*$" "\\1" Deflate_MAJOR_VERSION
                       "${Deflate_H}"
  )
  string(REGEX REPLACE "^.*Deflate_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" Deflate_MINOR_VERSION
                       "${Deflate_H}"
  )
  set(Deflate_VERSION_STRING "${Deflate_MAJOR_VERSION}.${Deflate_MINOR_VERSION}")

  set(Deflate_MAJOR_VERSION "${Deflate_VERSION_MAJOR}")
  set(Deflate_MINOR_VERSION "${Deflate_VERSION_MINOR}")
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  Deflate
  REQUIRED_VARS Deflate_LIBRARY Deflate_INCLUDE_DIR
  VERSION_VAR Deflate_VERSION_STRING
)

if(Deflate_FOUND)
  set(Deflate_INCLUDE_DIRS ${Deflate_INCLUDE_DIR})

  if(NOT Deflate_LIBRARIES)
    set(Deflate_LIBRARIES ${Deflate_LIBRARY})
  endif()

  if(NOT TARGET Deflate::Deflate)
    add_library(Deflate::Deflate UNKNOWN IMPORTED)
    set_target_properties(
      Deflate::Deflate PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${Deflate_INCLUDE_DIRS}"
    )

    if(Deflate_LIBRARY_RELEASE)
      set_property(
        TARGET Deflate::Deflate
        APPEND
        PROPERTY IMPORTED_CONFIGURATIONS RELEASE
      )
      set_target_properties(
        Deflate::Deflate PROPERTIES IMPORTED_LOCATION_RELEASE "${Deflate_LIBRARY_RELEASE}"
      )
    endif()

    if(Deflate_LIBRARY_DEBUG)
      set_property(
        TARGET Deflate::Deflate
        APPEND
        PROPERTY IMPORTED_CONFIGURATIONS DEBUG
      )
      set_target_properties(
        Deflate::Deflate PROPERTIES IMPORTED_LOCATION_DEBUG "${Deflate_LIBRARY_DEBUG}"
      )
    endif()

    if(NOT Deflate_LIBRARY_RELEASE AND NOT Deflate_LIBRARY_DEBUG)
      set_target_properties(
        Deflate::Deflate PROPERTIES IMPORTED_LOCATION_RELEASE "${Deflate_LIBRARY}"
      )
    endif()
  endif()
endif()