[cmake] Change the way shared libraries are built

Before this change shared libraries were built by creating a static
library using core_add_library and then linking that into a
shared/module one using core_link_libraries. This has a few drawbacks:

 - Meanwhile most libraries don't use wrapping (for VFS support)
   anymore, and we can use CMake mechanisms to create those libraries.
 - The approach doesn't work with MSVC as there is no "whole-archive"
   option. On windows these symbols would need different exporting.
 - The main usage of core_add_library is to generate small libraries
   for the Kodi main application. Let's use it only for that.
   This is in preparation to disable building of per folder static
   libraries because they don't work well with VS and Xcode.

This commit introduces the following changes:
 - Shared/Module libraries are now created with core_add_shared_library,
   addon callback libraries are now created with core_add_addon_library.
 - Fix dependencies: make kodi now builds everything needed to run kodi
   including all dl-loaded libraries.
 - Only use wrapping for libraries where it's also done with Autotools
 - WRAP_FILES and wrap-libraries are renamed to LIBRARY_FILES and
   kodi-libraries.
 - Library wrapping and generation now works in all subdirectories.
   Previously core_link_libraries had to be called in the main
   CMakeLists.txt because file dependencies in add_custom_command only
   work in the same directory. This also made it necessary to create
   wrap_* targets.
 - Generator expressions in core_link_libraries make the function
   less error prone.

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/libexif/CMakeLists.txt b/lib/libexif/CMakeLists.txt
index d21d4fc1d8..6ecc48a54a 100644
--- a/lib/libexif/CMakeLists.txt
+++ b/lib/libexif/CMakeLists.txt
@@ -3,7 +3,11 @@ set(SOURCES ExifParse.cpp
             JpegParse.cpp
             libexif.cpp)
 
-set(CMAKE_POSITION_INDEPENDENT_CODE 1)
+set(HEADERS ExifParse.h
+            IptcParse.h
+            JpegParse.h
+            libexif.h)
 
-core_add_library(exif NO_MAIN_DEPENDS)
+core_add_shared_library(exif WRAPPED)
 target_compile_definitions(exif PRIVATE _LINUX _DLL)
+set_target_properties(exif PROPERTIES FOLDER lib)