Re: Weird tests in the Autoconf testsuite (tests 149 and 150)

[Ralf Wildenhues]

Hello Benoit,

* Benoit Sigoure wrote on Mon, Nov 12, 2007 at 09:10:10AM CET:
>
> could anyone explain me these two tests:
> 149: AC_PROG_CPP without warnings                    skipped (c.at:142)
> 150: AC_PROG_CPP via CC                              skipped (c.at:180)
> in particular why they try to use /lib/cpp and when are they meant to NOT 
> be skipped?

Not sure what you mean, but those tests aren't skipped on AIXen,
HP-UXen, GNU/Linux, most Solaris releases before 10.  /lib/cpp
is what AC_PROG_CPP may choose, AFAIK it's also the traditional
location of the preprocessor.  The test whether /lib/cpp doesn't
work is meant for Solaris 10, where that preprocessor exists but
is too dumb to parse /usr/include/stdio.h, and of course isn't the
preprocessor which is used by the compiler:
<http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/4748/focus=4750>

The skip may well be too generous.

Cheers,
Ralf