[libvpx] Add cmake config file (#11795)

* [libvpx] Add cmake config file

This allows libvpx to be used with

find_package(libvpx CONFIG REQUIRED)
target_link_libraries(main PRIVATE libvpx::libvpx)

Tested on all supported windows triplets.

* [libvpx] Rename cmake config file to make clear it is unofficial

* [libvpx] Add cmake config target guard

* [libvpx] Update version

3 files changed, 57 insertions, 1 deletions

diff --git a/ports/libvpx/CONTROL b/ports/libvpx/CONTROL
index b576588a3..0ff504cd4 100644
--- a/ports/libvpx/CONTROL
+++ b/ports/libvpx/CONTROL
@@ -1,5 +1,5 @@
 Source: libvpx

-Version: 1.8.1-4

+Version: 1.8.1-5

 Homepage: https://github.com/webmproject/libvpx

 Description: The reference software implementation for the video coding formats VP8 and VP9.

 Supports: !(uwp|arm|arm64)

diff --git a/ports/libvpx/portfile.cmake b/ports/libvpx/portfile.cmake
index 1e3d885fc..fd22c0eeb 100644
--- a/ports/libvpx/portfile.cmake
+++ b/ports/libvpx/portfile.cmake
@@ -212,5 +212,12 @@ else()
     endif()
 endif()
 
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
+    set(LIBVPX_CONFIG_DEBUG ON)
+else()
+    set(LIBVPX_CONFIG_DEBUG OFF)
+endif()
+configure_file(${CMAKE_CURRENT_LIST_DIR}/unofficial-libvpx-config.cmake.in ${CURRENT_PACKAGES_DIR}/share/unofficial-libvpx/unofficial-libvpx-config.cmake @ONLY)
+
 file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/libvpx)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/libvpx/LICENSE ${CURRENT_PACKAGES_DIR}/share/libvpx/copyright)
diff --git a/ports/libvpx/unofficial-libvpx-config.cmake.in b/ports/libvpx/unofficial-libvpx-config.cmake.in
new file mode 100644
index 000000000..6e8fced36
--- /dev/null
+++ b/ports/libvpx/unofficial-libvpx-config.cmake.in
@@ -0,0 +1,49 @@
+if(NOT TARGET unofficial::libvpx::libvpx)

+  # Compute the installation prefix relative to this file.

+  get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)

+  get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)

+  get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)

+

+  # Add library target (note: vpx always has a static build in vcpkg).

+  add_library(unofficial::libvpx::libvpx STATIC IMPORTED)

+

+  # Add interface include directories and link interface languages (applies to all configurations).

+  set_target_properties(unofficial::libvpx::libvpx PROPERTIES

+    INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include"

+    IMPORTED_LINK_INTERFACE_LANGUAGES "C"

+  )

+  list(APPEND _IMPORT_CHECK_FILES "${_IMPORT_PREFIX}/include/vpx/vpx_codec.h")

+

+  # Add release configuration properties.

+  find_library(_LIBFILE_RELEASE NAMES vpx@LIBVPX_CRT_SUFFIX@ PATHS "${_IMPORT_PREFIX}/lib/" NO_DEFAULT_PATH)

+  set_property(TARGET unofficial::libvpx::libvpx

+    APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)

+  set_target_properties(unofficial::libvpx::libvpx PROPERTIES

+    IMPORTED_LOCATION_RELEASE ${_LIBFILE_RELEASE})

+  list(APPEND _IMPORT_CHECK_FILES ${_LIBFILE_RELEASE})

+  unset(_LIBFILE_RELEASE CACHE)

+

+  # Add debug configuration properties.

+  if(@LIBVPX_CONFIG_DEBUG@)

+    find_library(_LIBFILE_DEBUG NAMES vpx@LIBVPX_CRT_SUFFIX@d PATHS "${_IMPORT_PREFIX}/debug/lib/" NO_DEFAULT_PATH)

+    set_property(TARGET unofficial::libvpx::libvpx

+      APPEND PROPERTY IMPORTED_CONFIGURATIONS DEBUG)

+    set_target_properties(unofficial::libvpx::libvpx PROPERTIES

+      IMPORTED_LOCATION_DEBUG ${_LIBFILE_DEBUG})

+    list(APPEND _IMPORT_CHECK_FILES ${_LIBFILE_DEBUG})

+    unset(_LIBFILE_DEBUG CACHE)

+  endif()

+

+  # Check header and library files are present.

+  foreach(file ${_IMPORT_CHECK_FILES} )

+    if(NOT EXISTS "${file}" )

+      message(FATAL_ERROR "unofficial::libvpx::libvpx references the file

+   \"${file}\"

+but this file does not exist.  Possible reasons include:

+* The file was deleted, renamed, or moved to another location.

+* An install or uninstall procedure did not complete successfully.

+")

+    endif()

+  endforeach()

+  unset(_IMPORT_CHECK_FILES)

+endif()