glibc can be compiled for m68k, but only with m68020 cpu optimizations

target/config/Config.in.libc

@@ -70,6 +70,7 @@ config ADK_TARGET_LIB_GLIBC
 		ADK_TARGET_ARCH_ARM || \
 		ADK_TARGET_ARCH_HPPA || \
 		ADK_TARGET_ARCH_IA64 || \
+		ADK_TARGET_ARCH_M68K || \
 		ADK_TARGET_ARCH_MICROBLAZE || \
 		ADK_TARGET_ARCH_MIPS || \
 		ADK_TARGET_ARCH_MIPS64 || \