[Bug rtl-optimization/25609] too agressive printf optimization

["gustavodn at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #21 from gustavodn at gmail dot com  2008-01-16 01:52 -------
(In reply to comment #20)
> Anyway, if you really want to believe that printf("%s\n",s) and puts(s) should
> not have the same effect for defined behaviour, then we will have to agree to
> disagree.

That's confused, what is being discussed is undefined behavior X optimization
trusting it. Still, the manpage for puts() says "output of characters and
strings", while the one for printf() says "formatted output conversion". puts()
just sends a string to stdout, printf() converts data into their string
representation. So I agree to disagree about the expectation on what they do
about NULL: puts() should do nothing or merely return error, while printf()
*could* convert or otherwise print a string representation of it.

Given the impasse, and given Glibc defines what it does, I understand the next
correct thing for someone who cares to do, is to report a bug on GCC about this
issue on any specific distributions using GCC together with Glibc.

cya


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25609