LibSystem: Disable stack protector in syscall wrappers on i686

This is a hack to avoid a circular dependency issue with the stack check
failure handler being in LibC.

This is not ideal, and there's most likely a better way to solve this.

That said, LibSystem should not have anything but thin wrappers around
system calls, so stack protectors have limited utility here anyway.

Author: awesomekling

Userland/Libraries/LibSystem/CMakeLists.txt

@@ -3,6 +3,11 @@ set(SOURCES
     syscall.cpp
 )
 
+# FIXME: This is a hack to avoid a circular dependency with LibC. Figure out a better way.
+if ("${SERENITY_ARCH}" STREQUAL "i686")
+    set_source_files_properties(${SOURCES} PROPERTIES COMPILE_FLAGS "-fno-stack-protector")
+endif()
+
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib")
 serenity_libc(LibSystem system)
 target_include_directories(LibSystem PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})