--- Begin Message ---
|
Subject: |
Re: [UnixOS2] -lcposix |
|
Date: |
Tue, 9 Oct 2001 10:14:17 +0200 |
|
User-agent: |
Mutt/1.3.17i |
On Mon, Oct 08, 2001 at 09:40:03PM +0200, Andreas Buening wrote:
> Okay, my last mail has lost all important info, so I'll try again:
>
> Holger Veit wrote:
> >
> > On Mon, Oct 08, 2001 at 04:20:02PM +0100, John Poltorak wrote:
> > [...]
> > > The config.h file produced when building SED contains this:-
> > >
> > > /* Define if you have the `cposix' library (-lcposix). */
> > > #define HAVE_LIBCPOSIX 1
> > >
> > > This is something which seems to have occurred only recently.
> > >
> > > Not sure how to trace where is gets set though...
> >
> > There should be a test somewhere in configure which here returns
> > an incorrect result.
>
> Yes and because it seems to be a essential problem for some of you
> I've searched for the responsible macro. And here it is:
>
> configure.in:
>
> Replace
>
> AC_CHECK_LIB(cposix,strerror)
>
> by:
>
> AC_CHECK_FUNC([strerror])
> if test "$ac_cv_func_strerror" != "yes"; then
> AC_CHECK_LIB(cposix,strerror)
> fi
>
> But please don't ask me why AC_CHECK_LIB successes on OS/2 while it
> fails on Linux (both don't have a cposix).
This test is Linuxish-only, and entirely WRONG! Effectively it is based
on the following assumption: libc does not contain strerror, whereas
libcposix does. So the test makes a "void main(void) {strerror(); }"
and compiles it with "$CC -o foo test.c -lcposix".
Under Linux this will work if libcposix exists, and fail if not
(old Linux version).
Under EMX this will return true even without an existing libcposix, because
strerror is in libc and the compile line implicitly adds a -lc, so the
above gets compiled correctly.
I'd recommend a bug report to the autoconf people.
Holger
--
Please update your tables to my new e-mail address:
holger.veit$ais.fhg.de (replace the '$' with '@' -- spam-protection)
--- End Message ---