Re: AC_PROG_GNU_M4 does not reject IRIX m4

[Eric Blake]

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According to Ralf Wildenhues on 9/30/2007 12:27 PM:
> Hello bug-autoconf,

Hi Ralf,

> 
> The current test for the trace bug in autoconf/m4/m4.m4 does not reject
> IRIX 6.5 /bin/m4.  The latter accepts unknown options starting in `--',
> outputs nothing for the bad trace, and exits zero.
> 
> This wouldn't itself be so bad, as `make' quickly unveils that GNU m4 is
> needed, but the test happens to claim that it actually found GNU m4.

OK, I'll have to beef up that test to do some actual output (using one of
the gnu-specific builtins, such as indir, should flush out non-GNU m4 that
exit with status 0).

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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