From 0d3c307cee6e8135c84f3f7755bbc10dfd26e02b Mon Sep 17 00:00:00 2001
From: evpobr <evpobr@gmail.com>
Date: Sat, 16 Feb 2019 11:50:16 +0500
Subject: [PATCH] Install CMake package config module

---
 CMakeLists.txt | 40 ++++++++++++++++++++++++++++++++++------
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ab14a2..9f5ee5a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,10 @@
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 2.8.12)
 project(libogg)
 
 # Required modules
 include(GNUInstallDirs)
 include(CheckIncludeFiles)
+include(CMakePackageConfigHelpers)
 
 # Build options
 option(BUILD_SHARED_LIBS "Build shared library" OFF)
@@ -80,18 +81,24 @@ if(BUILD_FRAMEWORK)
     set(BUILD_SHARED_LIBS TRUE)
 endif()
 
-include_directories(include ${CMAKE_CURRENT_BINARY_DIR}/include)
-add_library(ogg ${OGG_HEADERS} ${OGG_SOURCES})
+add_library(Ogg ${OGG_HEADERS} ${OGG_SOURCES})
+
+target_include_directories(Ogg
+    PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
 
 get_version_info(OGG_VERSION_INFO "LIB_CURRENT" "LIB_AGE" "LIB_REVISION")
 set_target_properties(
-    ogg PROPERTIES
+    Ogg PROPERTIES
     SOVERSION ${OGG_VERSION_INFO}
     PUBLIC_HEADER "${OGG_HEADERS}"
 )
 
 if(BUILD_FRAMEWORK)
-    set_target_properties(ogg PROPERTIES
+    set_target_properties(Ogg PROPERTIES
         FRAMEWORK TRUE
         FRAMEWORK_VERSION ${PROJECT_VERSION}
         MACOSX_FRAMEWORK_IDENTIFIER org.xiph.ogg
@@ -100,17 +107,38 @@ if(BUILD_FRAMEWORK)
         XCODE_ATTRIBUTE_INSTALL_PATH "@rpath"
         OUTPUT_NAME Ogg
     )
+else()
+    set_target_properties(Ogg PROPERTIES OUTPUT_NAME ogg)
 endif()
 
 configure_pkg_config_file(ogg.pc.in)
 
-install(TARGETS ogg
+set(CMAKE_INSTALL_PACKAGEDIR ${CMAKE_INSTALL_LIBDIR}/cmake/Ogg)
+
+install(TARGETS Ogg
+    EXPORT OggConfig
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     FRAMEWORK DESTINATION ${CMAKE_INSTALL_PREFIX}
     PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/ogg
 )
+install(EXPORT OggConfig
+    NAMESPACE Ogg::
+    DESTINATION ${CMAKE_INSTALL_PACKAGEDIR}
+)
+
+if(CMAKE_VERSION VERSION_LESS 3.11)
+    write_basic_package_version_file(OggConfigVersion.cmake COMPATIBILITY SameMajorVersion)
+else()
+    write_basic_package_version_file(OggConfigVersion.cmake COMPATIBILITY SameMinorVersion)
+endif()
+
+install(
+    FILES ${CMAKE_CURRENT_BINARY_DIR}/OggConfigVersion.cmake
+    DESTINATION	${CMAKE_INSTALL_PACKAGEDIR}
+)
+
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ogg.pc
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
 )
-- 
2.20.1.windows.1