Re: GCC

["Kai Henningsen" <kai AT cats.ms>]

On 13 Sep 99, at 9:42, Mumit Khan wrote:

> "Kai Henningsen" <kai@cats.ms> writes:
> > On 23 Aug 99, at 11:57, Mumit Khan wrote:
> >
> > > "hark sng-" <passhark@hotmail.com> writes:
> > > > I tried compiling a simple program using Ming32 and Cywin GCC, but in =
> > both i
> > > > get the CPP program giving me a error message saying: the -remap optio=
> > n is
> > > > no understood.
> >
> > Same problem here: just calling cpp without any arguments is
> > enough to make this happen (cpp complains about -remap in a
> > loop until no more processes).
>
> I believe hark sng-'s problem had to do with having GNAT installed, which
> "hijacks" every other installation via a registry entry. See my "fixes"
> area for workaround:
> http://www.xraylith.wisc.edu/~khan/software/gnu-win32/gcc.html#gcc295-fixes

Well, I don't have (and never had) GNAT installed. And I don't have
the registry keys mentioned there.

> > Installation sequence:
> >
> > 1. B20.1
> > 2. Snapshot 19990905
> > 3. gcc 2.95
> > 4. gcc 2.95 dev-ss
> >
> > The weird thing is it looks as if it worked for a short time before
> > breaking this way.
>
> You need to be sure of that if that is indeed the case (that it worked
> for a short period)!

Well, I was trying to build the tiff libs. After finding that the
config.guess needed to be updated, that configure was highly
confused by ash refusing to do a cd, it suddenly told me there was
no working C compiler available. However, I had already removed
left-over a.exe files several times (back then, the problem was it
was looking for a.out)!

*** UPDATE *** before pondering the following info, read the rest of
the message for interesting changes!

> If you don't have GNAT installed, then we obviously need to figure this
> out. Please look through the output of:
>
>   $ gcc -print-search-dirs

bash-2.02$ gcc -print-search-dirs
install: /Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/
programs: /cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32/
2.95/:/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/:/Cygnus/cygwin-b2
0/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i586-cygw
in32/lib/gcc-lib/i586-cygwin32/:/usr/lib/gcc/i586-cygwin32/2.95/:/usr/lib/gcc/i5
86-cygwin32/:/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin
32/2.95/../../../../i586-cygwin32/bin/i586-cygwin32/2.95/:/cygdrive/f/cygnus/CYG
WIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/b
in/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/../../../.
./i586-cygwin32/bin/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/g
cc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/bin/
libraries: /cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32
/2.95/:/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/:/Cygnus/cygwin-b
20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/:/usr/lib/gcc/i586-cygwin32/2.
95/:/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/.
./../../../i586-cygwin32/lib/i586-cygwin32/2.95/:/cygdrive/f/cygnus/CYGWIN~1/H-I
586~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/lib/:/Cygn
us/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cy
gwin32/lib/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i5
86-cygwin32/2.95/../../../../i586-cygwin32/lib/:/cygdrive/f/cygnus/CYGWIN~1/H-I5
86~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../i586-cygwin32/2.95/:/cygdriv
e/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../:/Cy
gnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/../../../i586-cyg
win32/2.95/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/..
/../../:/lib/i586-cygwin32/2.95/:/lib/:/usr/lib/i586-cygwin32/2.95/:/usr/lib/
bash-2.02$

> and see where it's looking for things.
>
>   $ gcc -print-file-name=specs

bash-2.02$ gcc -print-file-name=specs
/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/../lib/gcc-lib/i586-cygwin32/2.95/specs

bash-2.02$

> > >   3. compiler version and some runtime info:
> > >
> > >      $ gcc -v filename.c
> >
> > Using builtin specs.
>
> Not the "builtin specs". That means GCC is just not finding what it's
> supposed to.

Hmm. Thinking about it, one of the things I think I did shortly before
the problem was adding /bin in front of the path, which points here:

bash-2.02$ mount
Device              Directory           Type         Flags
f:\cygnus\cygwin-b20\H-i586-cygwin32\bin  /bin                user         binmo
de
e:                  /                   user         binmode
bash-2.02$

And the cpp crash I looked most into was just typing "cpp" at the
bash prompt.

Let's just see ...

... oops. cpp doesn't crash right now! What the ...?

Oh, of course, /bin is missing. See if that breaks it - yup, sure does!

So, here is the above info again with the new PATH:

bash-2.02$ gcc -print-search-dirs
install: /Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/
programs: /bin/../lib/gcc-lib/i586-cygwin32/2.95/:/bin/../lib/gcc-lib/:/Cygnus/c
ygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i
586-cygwin32/lib/gcc-lib/i586-cygwin32/:/usr/lib/gcc/i586-cygwin32/2.95/:/usr/li
b/gcc/i586-cygwin32/:/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cyg
win32/bin/i586-cygwin32/2.95/:/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../..
/i586-cygwin32/bin/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32
/2.95/../../../../i586-cygwin32/bin/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i58
6-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/bin/
libraries: /bin/../lib/gcc-lib/i586-cygwin32/2.95/:/bin/../lib/gcc-lib/:/Cygnus/
cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/:/usr/lib/gcc/i586-cyg
win32/2.95/:/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/lib
/i586-cygwin32/2.95/:/bin/../lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cyg
win32/lib/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin32/2.95/../
../../../i586-cygwin32/lib/i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i586-cygwin3
2/lib/gcc-lib/i586-cygwin32/2.95/../../../../i586-cygwin32/lib/:/bin/../lib/gcc-
lib/i586-cygwin32/2.95/../../../i586-cygwin32/2.95/:/bin/../lib/gcc-lib/i586-cyg
win32/2.95/../../../:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-lib/i586-cygwin3
2/2.95/../../../i586-cygwin32/2.95/:/Cygnus/cygwin-b20/H-i586-cygwin32/lib/gcc-l
ib/i586-cygwin32/2.95/../../../:/lib/i586-cygwin32/2.95/:/lib/:/usr/lib/i586-cyg
win32/2.95/:/usr/lib/
bash-2.02$


bash-2.02$ gcc -print-file-name=specs
specs
bash-2.02$

So I guess that's it, but what happens here? Surely gcc should not
break from changing PATH?!

Ah yes, I remember why I did that:

/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/sh: cd: libtiff: No such file or direct
ory
= libtiff
/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/sh: cd: libtiff: No such file or direct
ory
= libtiff
/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/sh: cd: libtiff: No such file or direct
ory
= libtiff
/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/sh: cd: libtiff: No such file or direct
ory
= libtiff
/cygdrive/f/cygnus/CYGWIN~1/H-I586~1/bin/sh: cd: libtiff: No such file or direct

Of course, the subdir is just there. :-(

A short test (without /bin, but it turns out this doesn't change
anything):

bash-2.02$ cd libtiff
bash-2.02$ pwd
/tiffdir/libtiff
bash-2.02$ cd -
/tiffdir
bash-2.02$ $SHELL -c "cd libtiff"
/bin/sh: cd: libtiff: No such file or directory
bash-2.02$ $SHELL
sh-2.02$ pwd
/tiffdir
sh-2.02$ cd libtiff
sh: cd: libtiff: No such file or directory
sh-2.02$ exit
bash-2.02$ $SHELL --version
GNU bash, version 2.02.1(2)-release (i586-pc-cygwin32)
Copyright 1998 Free Software Foundation, Inc.
bash-2.02$

What's happening?! This is like nothing I have ever seen!


Regards - Kai Henningsen

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