build: add eo files generation to the macros

this will generate eo.h eo.c rules for SOURCES and public eo files.
This also installes the eo.h files from the public eo files into the
include directory, and installes the eo files into the correct location

cmake/helpers/EflMacros.cmake

@@ -385,7 +385,7 @@ endfunction()
 #  - INCLUDE_DIRECTORIES: results in target_include_directories
 #  - SYSTEM_INCLUDE_DIRECTORIES: results in target_include_directories(SYSTEM)
 #  - OUTPUT_NAME
-#  - SOURCES
+#  - SOURCES source files that are needed, eo files can also be added here to be build
 #  - PUBLIC_HEADERS
 #  - VERSION (defaults to project version)
 #  - SOVERSION (defaults to project major version)
@@ -395,6 +395,7 @@ endfunction()
 #  - LIBRARIES: results in target_link_libraries(LINK_PRIVATE)
 #  - PUBLIC_LIBRARIES: results in target_link_libraries(LINK_PUBLIC)
 #  - DEFINITIONS: target_compile_definitions()
+#  - PUBLIC_EO_FILES: the eo files will be used to build that lib, and will be installed to the filesystem
 #
 # Defines the following variables that can be used within the included files:
 #  - EFL_LIB_CURRENT to ${Name}
@@ -469,15 +470,26 @@ function(EFL_LIB _target)
     message(FATAL_ERROR "Shared libraries must install public headers!")
   endif()
 
+  #merge public eo files into sources
+  set(SOURCES ${SOURCES} ${PUBLIC_EO_FILES})
+
   EFL_FILES_TO_ABSOLUTE(_headers ${EFL_LIB_SOURCE_DIR} ${EFL_LIB_BINARY_DIR}
     ${PUBLIC_HEADERS})
   EFL_FILES_TO_ABSOLUTE(_sources ${EFL_LIB_SOURCE_DIR} ${EFL_LIB_BINARY_DIR}
     ${SOURCES})
   EFL_FILES_TO_ABSOLUTE(_obj_deps ${EFL_LIB_SOURCE_DIR} ${EFL_LIB_BINARY_DIR}
     ${OBJECT_DEPENDS})
+  EFL_FILES_TO_ABSOLUTE(_public_eo_files ${EFL_LIB_SOURCE_DIR} ${EFL_LIB_BINARY_DIR}
+    ${PUBLIC_EO_FILES})
+
+  foreach(public_eo_file ${_public_eo_files})
+    get_filename_component(filename ${public_eo_file} NAME)
+    list(APPEND _headers ${EFL_LIB_BINARY_DIR}/${filename}.h)
+  endforeach()
 
   EFL_PKG_CONFIG_EVAL(${_target} "${PKG_CONFIG_REQUIRES_PRIVATE}" "${PKG_CONFIG_REQUIRES}")
 
+
   add_library(${_target} ${LIBRARY_TYPE} ${_sources} ${_headers})
   set_target_properties(${_target} PROPERTIES
     FRAMEWORK TRUE
@@ -519,6 +531,8 @@ function(EFL_LIB _target)
       SOVERSION ${SOVERSION})
   endif()
 
+  EFL_CREATE_EO_RULES(${_target} ${EFL_LIB_BINARY_DIR})
+
   EFL_PKG_CONFIG_LIB_WRITE()
 
   install(TARGETS ${_target}
@@ -526,7 +540,9 @@ function(EFL_LIB _target)
     RUNTIME DESTINATION bin
     ARCHIVE DESTINATION lib
     LIBRARY DESTINATION lib)
-
+  install(FILES
+    ${_public_eo_files} DESTINATION share/eolian/include/${_target}-${PROJECT_VERSION_MAJOR}
+    )
   # do not leak those into binaries, modules or tests
   unset(_sources)
   unset(_headers)
@@ -879,4 +895,56 @@ macro(EFL_PROJECT version)
     project(efl VERSION ${version}.${GIT_VERSION})
   endif ("${CMAKE_BUILD_TYPE}" STREQUAL "Release")
   message("VERSION ${PROJECT_VERSION}")
-endmacro()
+endmacro()
+
+# Will use the source of the given target to create rules for creating
+# the .eo.c and .eo.h files. The INCLUDE_DIRECTORIES of the target will be used
+function(EFL_CREATE_EO_RULES target generation_dir)
+   get_target_property(build_files ${target} SOURCES)
+   get_target_property(_link_libraries ${target} LINK_LIBRARIES)
+   #build a list of targets we use to scan for all files
+   list(APPEND _include_targets ${target})
+   foreach(lib ${_link_libraries})
+     if (TARGET ${lib})
+        list(APPEND _include_targets ${lib})
+     endif()
+   endforeach()
+
+   #build a list of include directories
+   foreach(link_target ${_include_targets})
+     list(APPEND include_cmd -I${CMAKE_SOURCE_DIR}/src/lib/${link_target})
+   endforeach()
+
+   foreach(file ${build_files})
+      get_filename_component(ext ${file} EXT)
+      get_filename_component(filename ${file} NAME)
+
+      if (${ext} MATCHES "^\\.eo$")
+         set(build_files ${EFL_LIB_BINARY_DIR}/${filename}.c ${EFL_LIB_BINARY_DIR}/${filename}.h)
+         set(create_rule ON)
+      elseif (${ext} MATCHES "^\\.eot$")
+         set(build_files ${EFL_LIB_BINARY_DIR}/${filename}.h)
+         set(create_rule ON)
+      endif()
+
+      #add the custom rule
+      if (create_rule)
+        message("CREATE CUSTOM COMMAND FOR ${build_files}")
+        add_custom_command(
+           OUTPUT ${build_files}
+           COMMAND ${CMAKE_COMMAND} -E env "EFL_RUN_IN_TREE=1" ${EOLIAN_BIN} ${include_cmd} -o c:${EFL_LIB_BINARY_DIR}/${filename}.c -o h:${EFL_LIB_BINARY_DIR}/${filename}.h ${file}
+           DEPENDS ${file}
+        )
+        unset(create_rule)
+        list(APPEND eo_gen_files ${build_files})
+      endif()
+    endforeach()
+    if(eo_gen_files)
+      file(MAKE_DIRECTORY ${EFL_LIB_BINARY_DIR})
+      add_custom_target(${target}-eo
+        DEPENDS ${eo_gen_files}
+      )
+      add_dependencies(${target} ${target}-eo)
+      add_dependencies(${target} eolian-bin)
+    endif()
+endfunction()