Re: Checking stderr form autoconf and autoheader

[Pavel Roskin]

Hello, Akim!

> Great work!  But maybe -W none is too strong, we should aim at -W
> syntax.  For instance this would help us tracking unsatisfied
> dependencies and circular breakage in Autoconf.

There is indeed circular breakage in Autoconf (if it's what you understand
under the term "circular breakage"). We should fix it first and then test.

$ cat >configure.in <<EOF
> AC_INIT
> AC_C_CONST
> AC_OUTPUT
> EOF
$ autoconf
configure.in:2: warning: AC_C_CONST was called before AC_PROG_CC_STDC

Another problem is that two very different warnings belong to the same
class "syntax" - unnecessary escapes in messages and incorrect order of
tests.

We need to separate the later ones to a separate category, let's name it
"order". It should be on by default.

On another hand, I'd like to turn off warnings about backslashes by
default. The problem is that they are needed for Autoconf-2.13. They are
obsolete, but they need to be tolerated if backward compatability is
desired.

At this point the testsuite will need another update.

Regards,
Pavel Roskin