builds/cmake/FindHarfBuzz.cmake

# Copyright (c) 2012, Intel Corporation
#
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# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
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#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors may
#   be used to endorse or promote products derived from this software without
#   specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# Try to find HarfBuzz include and library directories.
#
# After successful discovery, this will set for inclusion where needed:
#
#   HARFBUZZ_INCLUDE_DIRS - containg the HarfBuzz headers
#   HARFBUZZ_LIBRARIES    - containg the HarfBuzz library

include(FindPkgConfig)
pkg_check_modules(PC_HARFBUZZ QUIET harfbuzz)

find_path(HARFBUZZ_INCLUDE_DIRS
  NAMES hb.h
  HINTS ${PC_HARFBUZZ_INCLUDEDIR}
        ${PC_HARFBUZZ_INCLUDE_DIRS}
  PATH_SUFFIXES harfbuzz)

find_library(HARFBUZZ_LIBRARIES
  NAMES harfbuzz
  HINTS ${PC_HARFBUZZ_LIBDIR}
        ${PC_HARFBUZZ_LIBRARY_DIRS})

if (HARFBUZZ_INCLUDE_DIRS)
  if (EXISTS "${HARFBUZZ_INCLUDE_DIRS}/hb-version.h")
    file(READ "${HARFBUZZ_INCLUDE_DIRS}/hb-version.h" _harfbuzz_version_content)

    string(REGEX MATCH
           "#define +HB_VERSION_STRING +\"([0-9]+\\.[0-9]+\\.[0-9]+)\""
           _dummy "${_harfbuzz_version_content}")
    set(HARFBUZZ_VERSION "${CMAKE_MATCH_1}")
  endif ()
endif ()

if ("${harfbuzz_FIND_VERSION}" VERSION_GREATER "${HARFBUZZ_VERSION}")
  message(FATAL_ERROR
    "Required version (" ${harfbuzz_FIND_VERSION} ")"
    " is higher than found version (" ${HARFBUZZ_VERSION} ")")
endif ()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  harfbuzz
  REQUIRED_VARS HARFBUZZ_INCLUDE_DIRS HARFBUZZ_LIBRARIES
  VERSION_VAR HARFBUZZ_VERSION)

mark_as_advanced(
  HARFBUZZ_INCLUDE_DIRS
  HARFBUZZ_LIBRARIES)

# Allow easy linking as in
#
#   target_link_libraries(freetype PRIVATE Harfbuzz::Harfbuzz)
#
if (NOT CMAKE_VERSION VERSION_LESS 3.1)
  if (HARFBUZZ_FOUND AND NOT TARGET Harfbuzz::Harfbuzz)
    add_library(Harfbuzz::Harfbuzz INTERFACE IMPORTED)
    set_target_properties(
        Harfbuzz::Harfbuzz PROPERTIES
          INTERFACE_INCLUDE_DIRECTORIES "${HARFBUZZ_INCLUDE_DIRS}")
  endif ()
endif ()