Limited success with 3.0 branch on AIX

[David Edelsohn]

	I would like to refer the GDB experts to a question on the GCC
mailinglist in regard to Zack Weinberg's gcc2_compiled changes.  His patch
to implement DBX_OUTPUT_GCC_MARKER support on AIX was not completely
correct.  He used stabs N_OPT type which is not valid on AIX and does not
correspond to any AIX storage class stabx type.

	The closest AIX type seems to be C_GSYM (stabs N_GSYM).  Does GDB
for AIX care about the gcc2_compiled symbol?  Is using the N_GSYM type
(whose value is ignored, according to the documentation) okay?  The
semantics of a global symbol seem the closest to a N_OPT comment.  I do
not understand enough about the significance of the stab type to know if
this proposal would be satisfactory.

http://gcc.gnu.org/ml/gcc-patches/2001-04/msg01459.html

Thanks, David