On Thursday 10 November 2011 23:49:07 Graeme Russ wrote: > Remember, U-Boot uses --no-builtin, so apart from the libgcc functions, > there are no gcc functions included.
i don't think that's generally how gcc builtin's work. for the vast majority,
they're of the "optimize away with simple insns when possible" variety. so if
you do something like:
char c[4];
memset(c, 0, sizeof(c));
gcc will optimize that into a single 32bit load rather than calling memcpy().
but because we use -fno-builtins, gcc will make sure to call memcpy().
i can't think of any calls off the top of my head which would result in
invoking a func in libgcc.a.
-mike
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