Date: Fri, 24 Jun 2005 00:05:19 EST-10EDT,10,-1,0,7200,3,-1,0,7200,3600
Subject: [UnixOS2_Archive] No. 567

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Thursday 23 June 2005
 Number  567
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Subjects for today
 
1  Re:  gcc -b, what does it do? : Knut St. Osmundsen" <bird at anduin.net>
2  Re:  gcc -b, what does it do? : Dave Yeo" <dave_yeo at paralynx.com>
3   tcgetattr() : Nicholas Sheppard <nps at zeta.org.au>


**= Email   1 ==========================**

Date:  Wed, 22 Jun 2005 17:14:43 +0200
From:  "Knut St. Osmundsen" <bird at anduin.net>
Subject:  Re:  gcc -b, what does it do?

man gcc
[snip]
       Target Options
           -V version  -b machine
[snip]

However what you are seeing here seems to be an AIX ld features
(http://www-106.ibm.com/developerworks/eserver/articles/gnu.html):

"With GCC, gcc -shared creates a shared library. The linker
automatically exports some symbols, but you can use AIX's ld -bexpall to
export more symbols. Symbols with underscores are still not exported
automatically."

Kind Regards,
 knut


Dave Yeo wrote:
> While compiling gtk1.2.10 with gcc3.3.5 I got this error
> gcc -g -O2 -Wall -o testgtk testgtk.o .libs/gtk.a -L/usr/X11R6/lib
> -lgmodule -lglib -lXext -lX11 -lsocket -lm ../gdk/.libs/gdk.a -lgmodule
> -lglib -lXext -lX11 -lsocket -lm -L/usr/X11R6/lib -lXext -lX11 -lsocket
> -L/usr/X11R6/lib -bexpall -lgmodule -lglib -lm
> gcc: `-b' must come at the start of the command line
> 
> Has anyone seen this before? Looking at the GCC 3.3.5 manual -b is used
> to specify the target machine when cross-compiling. Obviously it must
> of had a different meaning at one time but I have no manual for 2.8.1
> or previous
> Dave
> 
> 
> 
> 


**= Email   2 ==========================**

Date:  Wed, 22 Jun 2005 21:01:20 -0800
From:  "Dave Yeo" <dave_yeo at paralynx.com>
Subject:  Re:  gcc -b, what does it do?

On Wed, 22 Jun 2005 17:14:43 +0200, Knut St. Osmundsen wrote:

>However what you are seeing here seems to be an AIX ld features
>(http://www-106.ibm.com/developerworks/eserver/articles/gnu.html):
>
>"With GCC, gcc -shared creates a shared library. The linker
>automatically exports some symbols, but you can use AIX's ld -bexpall to
>export more symbols. Symbols with underscores are still not exported
>automatically."
>
>Kind Regards,
> knut

Thanks for the info. I finally cleared this up by using the autoconf 2.13 that has been updated for building Mozilla. My slightly older one and the origanal configure created the problem.
Looking in ltconfig I see
# According to Greg Wooledge, -bexpall is only supported from AIX 4.2 on

Lots of other AIX linker options that start with -b as well
Dave



**= Email   3 ==========================**

Date:  Thu, 23 Jun 2005 20:18:03 +0000 (GMT)
From:  Nicholas Sheppard <nps at zeta.org.au>
Subject:   tcgetattr()

Hi all.

I've been trying to compile TinyFugue 5.0 for OS/2 with Innotek GCC 3.3.5
and am having some trouble with tcgetattr(), in that it always returns -1
with error "invalid argument". I get the same result from a program with
just:

    struct termios tty;

    printf("tcgetattr(0, &tty) = %d\n", tcgetattr(0, &tty));

The above (and earlier versions of TinyFugue) works fine with GCC 2.8.1 
but TinyFugue 5.0 uses a few things that 2.8.1 doesn't have so I thought 
I'd try 3.3.5.

I couldn't find much documentation on Innotek's libc; is tcgetattr()
supposed to work? If not, is there a way of working around it?

 	Nick S.