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From: "jan.kratochvil at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug threads/13582] issues with accessing errno in non-threaded
 program
Date: Wed, 11 Jan 2012 09:47:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id=13582

Jan Kratochvil <jan.kratochvil at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |jan.kratochvil at redhat
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--- Comment #1 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-01-11 09:47:40 UTC ---
(In reply to comment #0)
> (gdb) p errno
> Cannot find thread-local variables on this target

This is work arounded in Fedora GDB the straightforward way of substituting it
by "*((int *(*) (void)) __errno_location) ()":
http://pkgs.fedoraproject.org/gitweb/?p=gdb.git;a=blob_plain;f=gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch;hb=master


> [and on amd64-linux gdb doesn't know __errno_location returns a 64-bit value
> and tries to deference the sign-extended 32-bit result]

This works on normal distros featuring debug info for system components.

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