API: updated CMAKELISTS for static linking

CMakeLists.txt

@@ -1,24 +1,32 @@
 cmake_minimum_required(VERSION 3.16)
+project(image_processor LANGUAGES C)
+
 set(CMAKE_C_STANDARD 23)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-include_directories(include)
-project(image_processor LANGUAGES C)
 
-set(SOURCES
-	src/main.c
+include_directories(include)
+
+set(LIB_SOURCES
 	src/transformations.c
         src/utils.c
         src/filters.c
         src/imgio.c
-
 )
 
+find_package(PkgConfig REQUIRED)
 find_library(TURBOJPEG_LIB NAMES turbojpeg REQUIRED)
 find_path(TURBOJPEG_INCLUDE NAMES turbojpeg.h REQUIRED)
 
-add_executable(image_processor ${SOURCES})
+add_library(PROCESSOR STATIC ${LIB_SOURCES})
 
-target_include_directories(image_processor PRIVATE ${TURBOJPEG_INCLUDE})
+target_include_directories(PROCESSOR
+        PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+        $<INSTALL_INTERFACE:include>
+        PRIVATE
+        ${TURBOJPEG_INCLUDE}
+)
 
-target_link_libraries(image_processor PRIVATE ${TURBOJPEG_LIB})
+target_link_libraries(PROCESSOR PUBLIC ${TURBOJPEG_LIB})
+set_target_properties(PROCESSOR PROPERTIES EXPORT_NAME PROCESSOR)