Patch to allow strlen expander to fail

[Toon Moene]

Martin v. Loewis wrote:

> I can't see how linking libgcc helps; it does not provide a version of
> memcpy, either. GCC currently assumes that the programs it generates
> will be linked with the system's standard C library; that assumption
> is incorrect for a freestanding environment. 

Well, that's great, but the C Standard only asserts that there are two
execution environments defined - it doesn't say how a particular
compiler discerns whether it is compiling for one or the other
environment.

I think this can only be solved by having a compile time switch that
makes clear which of the two environments one compiles for.  It's
amazing to me that a compiler that's used so much in the embedded
community, doesn't even _have_ -hosted and -freestanding options.

-- 
Toon Moene (toon@moene.indiv.nluug.nl)
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