freebsd stable - Mar 2011 - bin/139146 still not right in FreeBSD 8.2 (-m32 on amd64)?

Just installed a fresh 8.2-stable on a brand-spanking-new 64-bit
machine...

But, when I try to build 32-bit programs I get problems linking,
and I stumbled onto PR bin/139146.

The PR mentions this quick test:

  uname -sr && echo "int main () { }" > t.c && gcc
-v --help 2>&1 | grep m32 && gcc -m32 t.c

which I try to get this output:

FreeBSD 8.2-RELEASE
  -m32                        Generate 32bit i386 code
/usr/bin/ld: skipping incompatible /usr/lib/libgcc.a when searching for -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc


So - I'm wondering what the proper approach is on amd64 to build 
32-bit applications?

	- Thanks! -
	- Dave Rivers -

--
rivers@dignus.com                        Work: (919) 676-0847
Get your mainframe programming tools at http://www.dignus.com

On Wed, Mar 9, 2011 at 12:15 PM, Thomas David Rivers <rivers@dignus.com>
wrote:
>
> Just installed a fresh 8.2-stable on a brand-spanking-new 64-bit
> machine...
>
> But, when I try to build 32-bit programs I get problems linking,
> and I stumbled onto PR bin/139146.
>
> The PR mentions this quick test:
>
> ?uname -sr && echo "int main () { }" > t.c &&
gcc -v --help 2>&1 | grep m32 && gcc -m32 t.c
Add -B/usr/lib32 to the gcc command line, e.g.:

echo "int main () { }" > t.c && gcc -v --help 2>&1 |
grep m32 && gcc
-m32 -B/usr/lib32 t.c

Then it should work.

Josh

Thanks everyone! -B/usr/lib32 worked around the issue...

	- Dave Rivers -

--
rivers@dignus.com                        Work: (919) 676-0847
Get your mainframe programming tools at http://www.dignus.com

On Wed, Mar 09, 2011 at 03:15:39PM -0500, Thomas David Rivers
wrote:
> But, when I try to build 32-bit programs I get problems linking,
> and I stumbled onto PR bin/139146.
That one was closed as a duplicate of gnu/112215.  I've forwarded your
email to GNATS with the followup redirected there.

mcl

On 2011-03-09 21:15, Thomas David Rivers wrote:
> Just installed a fresh 8.2-stable on a brand-spanking-new 64-bit
> machine...
>
> But, when I try to build 32-bit programs I get problems linking,
> and I stumbled onto PR bin/139146.
...
> /usr/bin/ld: skipping incompatible /usr/lib/libgcc.a when searching for
-lgcc
> /usr/bin/ld: skipping incompatible /usr/lib/libgcc.a when searching for
-lgcc
> /usr/bin/ld: cannot find -lgcc
I committed a fix for this in r219648, so at least:
- gcc -m32 uses the correct library path to find crt startup objects
- ld uses the correct library path to find libraries
- simple 'hello world' type programs link and run

However, this does *not* solve the problem completely, as the system
headers in /usr/include/machine will still be amd64 specific.  This
can result in various kinds of brokenness.  Please be careful.

If you want to reliably build i386 executables, you should still use a
native i386 installation.

We are trying to compile i386 on a FreeBSD 8.2r amd64.
we are getting an error stating that libstdc++.so.6, is missing.
COMPACT6x and COMPACT7x have been installed. But this does not solve the
problem.
Is it possible to compile i386 on and amd64 system?

--
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On Tue, Aug 23, 2011 at 2:26 PM, noel beck <nbeck@hobsoft.com.mt>
wrote:
> We are trying to compile i386 on a FreeBSD 8.2r amd64.
> we are getting an error stating that libstdc++.so.6, is missing.
> COMPACT6x and COMPACT7x have been installed. But this does not solve the
> problem.
> Is it possible to compile i386 on and amd64 system?
>
I believe compiler flags to /lib32 is required (-L/usr/lib32 or something)

Maybe off topic? 

1: echo "int main(void) { return 0; }" > t.c

2: setenv LDEMULATION elf_i386_fbsd

3: gcc -c -m32 -o t.o t.c

4: gcc -nostartfiles -o a.out 
t.o -L/usr/lib32 /usr/lib32/crt1.o /usr/lib32/crti.o

5: file a.out
a.out: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), 
dynamically linked (uses shared libs), for FreeBSD 8.2, not stripped

6: uname -m
amd64

2: q.v. info binutils -> Selecting The Target System

Maybe there is a more comfortable way.
Michael

Am Tuesday 23 August 2011 09:46:11 schrieb Edho Arief:
> On Tue, Aug 23, 2011 at 2:26 PM, noel beck <nbeck@hobsoft.com.mt>
wrote:
> > We are trying to compile i386 on a FreeBSD 8.2r amd64.
> > we are getting an error stating that libstdc++.so.6, is missing.
> > COMPACT6x and COMPACT7x have been installed. But this does not solve
the
> > problem.
> > Is it possible to compile i386 on and amd64 system?
>
> I believe compiler flags to /lib32 is required (-L/usr/lib32 or something)
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