no warnings from third parties

CMakeLists.txt

@@ -45,11 +45,12 @@ else()
         set(SYSTEM_SOURCE_FILES)
 endif()
 
-set(TWN_SOURCE_FILES
+set(TWN_THIRD_PARTY_SOURCE_FILES
         third-party/physfs/extras/physfsrwops.c
         third-party/stb/stb_vorbis.c
-        third-party/glad/src/glad.c
+        third-party/glad/src/glad.c)
 
+set(TWN_SOURCE_FILES
         townengine/twn_loop.c
         townengine/twn_main.c
         townengine/config.h
@@ -68,11 +69,13 @@ set(TWN_SOURCE_FILES
 
 list(TRANSFORM TWN_SOURCE_FILES PREPEND ${TWN_ROOT_DIR}/)
 
+add_library(twn_third_parties STATIC ${TWN_THIRD_PARTY_SOURCE_FILES})
+
 # base engine code, reused for games and tools
 if(TWN_FEATURE_DYNLIB_GAME)
-        add_library(${TWN_TARGET} SHARED ${TWN_SOURCE_FILES})
+        add_library(${TWN_TARGET} SHARED ${TWN_SOURCE_FILES} ${twn_third_parties})
 else()
-        add_library(${TWN_TARGET} STATIC ${TWN_SOURCE_FILES})
+        add_library(${TWN_TARGET} STATIC ${TWN_SOURCE_FILES} ${twn_third_parties})
 endif()
 
 source_group(TREE ${TWN_ROOT_DIR} FILES ${TWN_SOURCE_FILES})
@@ -96,25 +99,7 @@ set(PACKAGE_EXTENSION "btw" CACHE STRING
                       "File extension used to look for data archives")
 
 
-function(give_options target)
+function(give_options_without_warnings target)
-        set(WARNING_FLAGS_CLANG
-                -Weverything
-                -Wno-padded
-                -Wno-declaration-after-statement
-                -Wno-unsafe-buffer-usage
-                -Wno-unused-command-line-argument)
-
-        set(WARNING_FLAGS
-                -Wall
-                -Wextra
-                -Wpedantic
-                -Wshadow
-                -Wdouble-promotion
-                -Wconversion -Wno-sign-conversion
-                -Werror=vla
-                $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Gnu>:-Wcast-align=strict>
-                $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:${WARNING_FLAGS_CLANG}>)
-
         set(BUILD_FLAGS
                 # these SHOULDN'T break anything...
                 -fno-math-errno
@@ -144,7 +129,6 @@ function(give_options target)
                 -fsanitize=address)
 
         target_compile_options(${target} PRIVATE
-                                         ${WARNING_FLAGS}
                                          ${BUILD_FLAGS}
                                          $<$<CONFIG:Release>:${BUILD_FLAGS_RELEASE}>
                                          $<$<CONFIG:Debug>:${BUILD_FLAGS_DEBUG}>)
@@ -162,6 +146,32 @@ function(give_options target)
 endfunction()
 
 
+function(give_options target)
+        give_options_without_warnings(${target})
+
+        set(WARNING_FLAGS_CLANG
+                -Weverything
+                -Wno-padded
+                -Wno-declaration-after-statement
+                -Wno-unsafe-buffer-usage
+                -Wno-unused-command-line-argument)
+
+        set(WARNING_FLAGS
+                -Wall
+                -Wextra
+                -Wpedantic
+                -Wshadow
+                -Wdouble-promotion
+                -Wconversion -Wno-sign-conversion
+                -Werror=vla
+                $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Gnu>:-Wcast-align=strict>)
+
+        target_compile_options(${target} PRIVATE
+                                         ${WARNING_FLAGS}
+                                         $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:${WARNING_FLAGS_CLANG}>)
+endfunction()
+
+
 function(include_deps target)
         # header-only libraries should be marked as "system includes"
         # to suppress compiler warnings in their code (it's not my problem after all)
@@ -273,9 +283,14 @@ function(use_townengine target sources output_directory data_dir)
         endif()
 endfunction()
 
+give_options_without_warnings(twn_third_parties)
+include_deps(twn_third_parties)
+link_deps(twn_third_parties)
+
 give_options(${TWN_TARGET})
 include_deps(${TWN_TARGET})
 link_deps(${TWN_TARGET})
+target_link_libraries(${TWN_TARGET} PUBLIC twn_third_parties)
 
 # build the testgame if this cmake list is built directly
 if(${CMAKE_PROJECT_NAME} MATCHES townengine)