[ox] Fix FreeBSD build

deps/ox/src/ox/std/CMakeLists.txt

@@ -44,7 +44,7 @@ add_library(
 if(NOT MSVC)
 	target_compile_options(OxStd PRIVATE -Wsign-conversion)
 	target_compile_options(OxStd PRIVATE -Wconversion)
-	if(UNIX AND NOT APPLE)
+	if(${OX_LINUX})
 		target_compile_options(OxStd PUBLIC -export-dynamic)
 		#target_link_options(OxStd PUBLIC -W1,-E)
 	endif()
@@ -74,6 +74,7 @@ endif()
 target_link_libraries(
 	OxStd PUBLIC
 		$<$<CXX_COMPILER_ID:GNU>:gcc>
+		$<$<BOOL:${OX_FREEBSD}>:execinfo>
 		OxTraceHook
 )