fix(build): fix compile and link flags

CMakeLists.txt

@@ -1,8 +1,6 @@
 cmake_minimum_required(VERSION 3.10)
 project(ZenKitCAPI LANGUAGES CXX C VERSION 1.3.0)
 
-include(support/BuildSupport.cmake)
-
 set(CMAKE_CXX_STANDARD 17)
 
 # Required for dependencies to compile properly.
@@ -68,6 +66,7 @@ list(APPEND _ZKC_SOURCES
         src/World.cc
 )
 
+include(support/BuildSupport.cmake)
 bs_select_cflags(${ZKC_ENABLE_ASAN} _ZKC_COMPILE_FLAGS _ZKC_LINK_FLAGS)
 
 add_library(zenkitcapi SHARED)
@@ -82,3 +81,6 @@ set_target_properties(zenkitcapi PROPERTIES CXX_VISIBILITY_PRESET hidden VISIBIL
 
 install(TARGETS zenkitcapi ARCHIVE LIBRARY RUNTIME)
 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/zenkitcapi" TYPE INCLUDE)
+
+add_executable(test test.c)
+target_link_libraries(test PRIVATE zenkitcapi)

support/BuildSupport.cmake

@@ -51,7 +51,7 @@ endfunction()
 ##   COMPILE(list): A list containing the compiler flags
 ##   LINK(list): A list containing the linker flags
 function(bs_internal_select_cflags_gcc SANITIZERS COMPILE LINK)
-    list(APPEND _INTERNAL_FLAGS "-Wall" "-Wextra" "-Werror" "-Wconversion" "-Wshadow" "-Wpedantic" "-fPIC")
+    list(APPEND _INTERNAL_FLAGS "-Wall" "-Wextra" "-Werror" "-Wconversion" "-Wshadow" "-Wpedantic" "-fPIC" "-Wno-deprecated-declarations")
 
     if (CMAKE_BUILD_TYPE MATCHES "^Debug" AND ${SANITIZERS} AND NOT WIN32)
         list(APPEND _INTERNAL_FLAGS "-fsanitize=address" "-fsanitize=undefined" "-fsanitize=leak")
@@ -73,6 +73,8 @@ endfunction()
 ##   LINK(list): A list containing the linker flags
 function(bs_internal_select_cflags_clang SANITIZERS COMPILE LINK)
     bs_internal_select_cflags_gcc(${SANITIZERS} _INTERNAL_COMPILE_FLAGS _INTERNAL_LINK_FLAGS)
+    list(APPEND _INTERNAL_COMPILE_FLAGS "-Wno-return-type-c-linkage")
+    list(APPEND _INTERNAL_LINK_FLAGS "-Wno-return-type-c-linkage")
 
     if (CMAKE_BUILD_TYPE MATCHES "^Debug")
         list(APPEND _INTERNAL_COMPILE_FLAGS "-fstandalone-debug")