!(fun) with tls

[NZG <ngustavson at emacinc dot com>]

I'm trying to build a cross compiler for a specific debian build we use on our 
embedded 568 SBC's.

This build uses the debain package libc6_2.3.2.ds1-22_i386.deb, which is the 
stable sarge version for the i386.

So,  I decompress crosstool-0.42, and make a copy of demo-i386.sh.
I change the target to:
eval `cat i386.dat gcc-3.4.3-glibc-2.3.2.dat` sh all.sh --notest

Start it up and it builds the cross toolchain perfectly, voila.

I copy my new toolchain into my SDK and build a test program, no problem.

I copy the libc from my target 
libc-2.3.2.so

and attempt to link against it: with
gcc-3.4.3-glibc-2.3.2/i386-unknown-linux-gnu/bin/i386-unknown-linux-gnu-gcc  
*.o -Wl -Llib/dynamic -o hello -lc-2.3.2

no dice:
lib/dynamic/libc-2.3.2.so: undefined reference to 
`_dl_tls_symaddr@GLIBC_PRIVATE'

Shouldn't this work? I see a tls in there (hence the title of the email) do I 
need to build with tls? I've tried it but it seems to be broken: (see error 
pasting at the end of the email)

Now to be fair, I don't know if linking against a remote libc is going to work 
even with the same version, I just suspect it indicates a problem.
More importantly, the cross compiler can't link against the pthreads library 
of this version
libpthread-0.10.so

Attempting to do so yields:

gcc-3.4.3-glibc-2.3.2/i386-unknown-linux-gnu/bin/i386-unknown-linux-gnu-gcc 
modreg.o -Wl -Llib/dynamic ../../lib/static/libmodbus.a -o 
modreg -lpthread-0.10
lib/dynamic/libpthread-0.10.so: undefined reference to 
`__libc_fork@GLIBC_2.1.2'

Which looks like utter madness to me,
GLIBC_2.1.2? where did that come from?
Neither the host, the target, or the cross compiler uses 2.1.2.

I thought, ok, maybe it's a tls thing, so I tried to build a tls 
cross-compiler:
eval `cat i386.dat gcc-4.0.2-glibc-2.3.2-tls.dat` sh all.sh --notest

but the build crashes with the errors pasted at the end of this email.

I have moved into the head pointing phase of this project, so I would 
appreciate any pointers.

thx,
NZG
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eval `cat i386.dat gcc-4.0.2-glibc-2.3.2-tls.dat` sh all.sh --notest

build errors:

In file included from dynamic-link.h:49,
                 from rtld.c:35:
../sysdeps/i386/dl-machine.h: In function `elf_machine_runtime_setup':
../sysdeps/generic/ldsodefs.h:171: warning: inlining failed in call to 
`_dl_name_match_p'
../sysdeps/i386/dl-machine.h:132: warning: called from here
rtld.c: In function `_dl_start':
../sysdeps/i386/dl-machine.h:100: warning: inlining failed in call to 
`elf_machine_runtime_setup'
rtld.c:439: warning: called from here
rtld.c: In function `dl_main':
rtld.c:1579: error: variable `ldt_entry' has initializer but incomplete type
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: warning: excess elements in struct initializer
rtld.c:1579: warning: (near initialization for `ldt_entry')
rtld.c:1579: error: storage size of `ldt_entry' isn't known
rtld.c:1579: error: `firstcall' undeclared (first use in this function)
rtld.c:1579: error: (Each undeclared identifier is reported only once
rtld.c:1579: error: for each function it appears in.)
make[2]: *** 
[/home/nathan/workspace-new/crosstool/crosstool-0.42/build/i386-unknown-linux-gnu/gcc-4.0.2-glibc-2.3.2/build-glibc/elf/rtld.os] 
Error 1
make[2]: Leaving directory 
`/home/nathan/workspace-new/crosstool/crosstool-0.42/build/i386-unknown-linux-gnu/gcc-4.0.2-glibc-2.3.2/glibc-2.3.2/elf'
make[1]: *** [elf/subdir_lib] Error 2
make[1]: Leaving directory 
`/home/nathan/workspace-new/crosstool/crosstool-0.42/build/i386-unknown-linux-gnu/gcc-4.0.2-glibc-2.3.2/glibc-2.3.2'
make: *** [all] Error 2
















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