[12253] in Athena Bugs
RS/6000 gdb in cygnus locker
daemon@ATHENA.MIT.EDU (John Carr)
Thu Jul 21 17:31:08 1994
To: bugs@MIT.EDU
Date: Thu, 21 Jul 94 17:31:04 EDT
From: John Carr <jfc@MIT.EDU>
There is a bug in the RS/6000 gdb in the cygnus locker. When I use it to
debug a program compiled with xlc 1.3.0.19 gdb gets the source filename
wrong. The default cygnus version thinks all source files are named ".file".
The version in cygnus-94q1 thinks the source file is named "". In the
first case, if only one file is compiled -g I can work around the bug by
creating a link to that file named ".file". In the second case there is no
workaround: gdb reads "", which is an alias for the current directory, and
prints binary garbage instead of a source listing. dbx reads the correct
source filename so this is probably not a compiler bug.
Here is a sample program:
----------------------------------------------------------------
main(){return 0;}
----------------------------------------------------------------
I compiled this code, in a file named "test.c", into the binary
encoded below.
If you want to recreate this bug by compiling from source you must
use xlc 1.3; gdb works with xlc 1.2.
begin 775 a.out
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end
