(Added Andi to CC) On 10.4.2013 11:24, Geert Uytterhoeven wrote: [...] > E.g. gcc turned > > strncat(name, "%d", 2); > > into a call to strlen() and a 16-bit store, causing a link failure, as > arch/m68k/include/asm/string.h provides strlen() using a macro: > > ERROR: "strlen" [net/ipv4/ip_tunnel.ko] undefined! [...] > QUESTION: Should we re-enable -ffreestanding in the main Makefile instead? > > It was removed in > > commit 6edfba1b33c701108717f4e036320fc39abe1912 > Author: Andi Kleen <ak@xxxxxxx> > Date: Sat Mar 25 16:29:49 2006 +0100 > > [PATCH] x86_64: Don't define string functions to builtin My understanding is, that with -fnobuiltin, the compiler is not allowed to make assumptions about functions if it does not see their definition, even if they resemble standard functions. E.g. on x86_64, strlen() is out-of-line, so gcc would have to assume, that strcmp() has side effects. How about just naming the m68k inline function 'strlen'? Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
