Error out for the case of a gcc-2.96 compiler with CONFIG_FRAME_POINTER

set. A few versions of gcc-2.96 generate seriously incorrect code.

init/main.c

@@ -39,6 +39,16 @@
 #include <asm/io.h>
 #include <asm/bugs.h>
 
+/*
+ * This is one of the first .c files built. Error out early
+ * if we have compiler trouble..
+ */
+#if __GNUC__ == 2 && __GNUC_MINOR__ == 96
+#ifdef CONFIG_FRAME_POINTER
+#error This compiler cannot compile correctly with frame pointers enabled
+#endif
+#endif
+
 #ifdef CONFIG_X86_LOCAL_APIC
 #include <asm/smp.h>
 #endif