FIX: an attempt to properly declare stb library

Author: ivan-mogilko

CMakeLists.txt

@@ -20,6 +20,7 @@ option(AGS_USE_LOCAL_SDL2 "Use a locally installed SDL2" ${AGS_USE_LOCAL_ALL_LIB
 option(AGS_USE_LOCAL_SDL2_SOUND "Use a locally installed SDL2 Sound" ${AGS_USE_LOCAL_ALL_LIBRARIES})
 option(AGS_USE_LOCAL_GLM "Use a locally installed GLM" ${AGS_USE_LOCAL_ALL_LIBRARIES})
 option(AGS_USE_LOCAL_MINIZ "Use a locally installed Miniz" ${AGS_USE_LOCAL_ALL_LIBRARIES})
+option(AGS_USE_LOCAL_STB "Use a locally installed STB" ${AGS_USE_LOCAL_ALL_LIBRARIES})
 option(AGS_USE_LOCAL_TINYXML2 "Use a locally installed TinyXML2" ${AGS_USE_LOCAL_ALL_LIBRARIES})
 option(AGS_USE_LOCAL_OGG "Use a locally installed OGG" ${AGS_USE_LOCAL_ALL_LIBRARIES})
 option(AGS_USE_LOCAL_THEORA "Use a locally installed Theora" ${AGS_USE_LOCAL_ALL_LIBRARIES})
@@ -338,6 +339,11 @@ else()
     find_package(miniz REQUIRED)
     add_library(MiniZ::MiniZ ALIAS miniz::miniz)
 endif()
+if (NOT AGS_USE_LOCAL_STB)
+add_subdirectory(libsrc/stb                     EXCLUDE_FROM_ALL)
+else()
+    find_package(stb REQUIRED)
+endif()
 
 add_subdirectory(Common/libsrc/aastr-0.1.1      EXCLUDE_FROM_ALL)
 

libsrc/stb/CMakeLists.txt

@@ -7,9 +7,4 @@ set_target_properties(stb PROPERTIES
 
 target_include_directories(stb PUBLIC . )
 
-target_sources(stb
-        PRIVATE
-        stb_image.h
-        )
-
 add_library(stb::stb ALIAS stb)