[Bug 86368] BUILD FAILED: why : forced (dist) upgrade for gcc 3.4.6 over a BIT COUNT, __builtin_ctz

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86368

--- Comment #1 from debguy <johnandsara2 at cox.net> ---

(all i meant with comments are: goal is not to continually upgrade gcc, bison,
etc, causing old code to be incompatible and faile: but to compile new
software: which is easily possible with early tools, new ELF or arch aside. 
__builtin could be a macro or check to see if accel was avail, rather than
using a tweak in gcc only new gcc has.  gcc is not the place to add convenience
functions: it's just not where they go.  libc might be.  even then for a bit
count that's the wrong avenue to expect C libs to be a "perl, unix in a big
module" of every new new bithack stacked against every kernel support of.  i
was pretty user processor support hacks are per arch in kernel, and lib c
sparsely supported them and driver coders commonly checked in the driver code
where useful for such, having both choices on hand)

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