New CMake

- add install and uninstall targets
- compatibility for systems without pkg-config

1 files changed, 99 insertions, 0 deletions

diff --git a/cmake/PkgConfigWithFallback.cmake b/cmake/PkgConfigWithFallback.cmake
new file mode 100644
index 00000000..988e4564
--- /dev/null
+++ b/cmake/PkgConfigWithFallback.cmake
@@ -0,0 +1,99 @@
+include(CMakeParseArguments)
+
+function(find_pkg_config_with_fallback name)
+    cmake_parse_arguments(ARGS "" "PKG_CONFIG_NAME" "LIB_NAMES;LIB_DIR_HINTS;INCLUDE_NAMES;INCLUDE_DIR_PATHS;INCLUDE_DIR_HINTS;INCLUDE_DIR_SUFFIXES;DEPENDS" ${ARGN})
+    set(${name}_PKG_CONFIG_NAME ${ARGS_PKG_CONFIG_NAME} PARENT_SCOPE)
+    find_package(PkgConfig)
+
+    if(PKG_CONFIG_FOUND)
+        pkg_search_module(${name}_PKG_CONFIG QUIET ${ARGS_PKG_CONFIG_NAME})
+    endif(PKG_CONFIG_FOUND)
+
+    if (${name}_PKG_CONFIG_FOUND)
+        # Found via pkg-config, using it's result values
+        set(${name}_FOUND ${${name}_PKG_CONFIG_FOUND})
+
+        # Try to find real file name of libraries
+        foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
+            find_library(LIB_NAME_${lib} ${lib} HINTS ${${name}_PKG_CONFIG_LIBRARY_DIRS})
+            if(NOT LIB_NAME_${lib})
+                unset(${name}_FOUND)
+            endif(NOT LIB_NAME_${lib})
+        endforeach(lib)
+        if(${name}_FOUND)
+            set(${name}_LIBRARIES "")
+            foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
+                list(APPEND ${name}_LIBRARIES ${LIB_NAME_${lib}})
+            endforeach(lib)
+            list(REMOVE_DUPLICATES ${name}_LIBRARIES)
+            set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
+            list(GET ${name}_LIBRARIES "0" ${name}_LIBRARY)
+
+            set(${name}_FOUND ${${name}_FOUND} PARENT_SCOPE)
+            set(${name}_INCLUDE_DIRS ${${name}_PKG_CONFIG_INCLUDE_DIRS} PARENT_SCOPE)
+            set(${name}_LIBRARIES ${${name}_PKG_CONFIG_LIBRARIES} PARENT_SCOPE)
+            set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
+            set(${name}_VERSION ${${name}_PKG_CONFIG_VERSION} PARENT_SCOPE)
+
+            if(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+                add_library(${ARGS_PKG_CONFIG_NAME} INTERFACE IMPORTED)
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_COMPILE_OPTIONS "${${name}_PKG_CONFIG_CFLAGS_OTHER}")
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${name}_PKG_CONFIG_INCLUDE_DIRS}")
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LIBRARIES}")
+            endif(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+        endif(${name}_FOUND)
+    else(${name}_PKG_CONFIG_FOUND)
+        # No success with pkg-config, try via find_library on all lib_names
+        set(${name}_FOUND "1")
+        foreach(lib ${ARGS_LIB_NAMES})
+            find_library(LIB_NAME_${lib} ${ARGS_LIB_NAMES} HINTS ${ARGS_LIB_DIR_HINTS})
+
+            if(NOT LIB_NAME_${lib})
+                unset(${name}_FOUND)
+            endif(NOT LIB_NAME_${lib})
+        endforeach(lib)
+
+        foreach(inc ${ARGS_INCLUDE_NAMES})
+            find_path(INCLUDE_PATH_${inc} ${inc} HINTS ${ARGS_INCLUDE_DIR_HINTS} PATHS ${ARGS_INCLUDE_DIR_PATHS} PATH_SUFFIXES ${ARGS_INCLUDE_DIR_SUFFIXES})
+
+            if(NOT INCLUDE_PATH_${inc})
+                unset(${name}_FOUND)
+            endif(NOT INCLUDE_PATH_${inc})
+        endforeach(inc)
+
+        if(${name}_FOUND)
+            set(${name}_LIBRARIES "")
+            set(${name}_INCLUDE_DIRS "")
+            foreach(lib ${ARGS_LIB_NAMES})
+                list(APPEND ${name}_LIBRARIES ${LIB_NAME_${lib}})
+            endforeach(lib)
+            foreach(inc ${ARGS_INCLUDE_NAMES})
+                list(APPEND ${name}_INCLUDE_DIRS ${INCLUDE_PATH_${inc}})
+            endforeach(inc)
+            list(GET ${name}_LIBRARIES "0" ${name}_LIBRARY)
+
+            foreach(dep ${ARGS_DEPENDS})
+                find_package(${dep} QUIET)
+
+                if(${dep}_FOUND)
+                    list(APPEND ${name}_INCLUDE_DIRS ${${dep}_INCLUDE_DIRS})
+                    list(APPEND ${name}_LIBRARIES ${${dep}_LIBRARIES})
+                else(${dep}_FOUND)
+                    unset(${name}_FOUND)
+                endif(${dep}_FOUND)
+            endforeach(dep)
+
+            set(${name}_FOUND ${${name}_FOUND} PARENT_SCOPE)
+            set(${name}_INCLUDE_DIRS ${${name}_INCLUDE_DIRS} PARENT_SCOPE)
+            set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
+            set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
+            unset(${name}_VERSION PARENT_SCOPE)
+
+            if(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+                add_library(${ARGS_PKG_CONFIG_NAME} INTERFACE IMPORTED)
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${name}_INCLUDE_DIRS}")
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LIBRARIES}")
+            endif(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+        endif(${name}_FOUND)
+    endif(${name}_PKG_CONFIG_FOUND)
+endfunction()
\ No newline at end of file