I'm trying to compile glibc (as a secondary, not a system replacement) 2.6 on an x86_64, and trying to get it to produce 32-bit objects. When I give it a standard configure, it compiles fine, producing the usual 64-bit library objects. Some info:

$ uname -a
Linux localhost.localdomain 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 \
EST 2010 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/redhat-release
CentOS release 5.4 (Final)

Among other things, I've tried the following:

Attempt 1:

$ # [in build/glibc-2.6]
$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --with-cpu=i386-pc-linux-gnu

...

checking sysdep dirs... configure: error: The i386-pc-linux-gnu
subspecies of x86_64 is not supported."

Attempt 2:

$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --host=i386-pc-linux-gnu

...

$ make

The configure succeeds, but make causes a stream of compilation errors which all look like this:

nptl/sysdeps/i386/tls.h:65:3: error: #error "TLS support is required."
In file included from include/tls.h:6,
                 from sysdeps/unix/sysv/linux/i386/sysdep.h:30,
                 from <stdin>:1:

I get the same result if I add --with-tls, and/or --target=i386-pc-linux-gnu.

[EDIT: It looks like I was confusing --target for --build. I tried adding --build=i386-pc-linux-gnu instead, and also for all of the other attempts where I tried --target. In all cases, I got exactly the same result as before.]

Attempt 3:

$ CFLAGS=-m32 \
  ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --host=i386-pc-linux-gnu \

... 

In file included from ./../in
linux 32bit-64bit glibc
Edit
Report