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RE: using GDB 5 on Solaris 7 with Sun WS5.0
- To: 'Michael Elizabeth Chastain' <chastain at cygnus dot com>, gdb at sourceware dot cygnus dot com, Tanvir Hassan <tanvir dot hassan at tumisoftware dot com>
- Subject: RE: using GDB 5 on Solaris 7 with Sun WS5.0
- From: Tanvir Hassan <tanvir dot hassan at tumisoftware dot com>
- Date: Fri, 23 Mar 2001 14:24:20 -0800
Here's the stuff I get from "man CC" on SunWorkshop 5 C++:
Note that -compat=5 (which lets me use STL) will set the __cplusplus macro
to "199711L". I don't know if that helps in determining which ABI those
guys are following. Also, I tried to compile helloworld.cpp with -g and see
if the newest snapshot (23/Mar/2001) could debug it without me resorting to
-xs and it cannot. Is there an option or config.h option that I need to
enable psymtab stuff?
Sets the compiler to be compatible with 4.0.1,
4.1, and 4.2 compilers; or with full 5.0. This
option controls the preprocessor __cplusplus
The C++ compiler has two principal modes. One
accepts the semantics and language defined by the
Annotated C++ Reference Manual (ARM) and used in
the 4.2 compiler (the compatibility mode, -com-
pat=4). The other accepts constructs according to
the ANSI/ISO standard (standards mode, -compat=5).
These two modes are incompatible with each other
because the ANSI/ISO standard forces significant,
incompatible changes in name mangling, vtable lay-
out, and other ABI details. These two modes are
differentiated by the -compat option as shown in
the following values.
-compat=4 Compile for compatibility with C++
4.0.1, C++ 4.1, and C++ 4.2 (Sets
__cplusplus macro to 1.)
-compat=5 Compile with full C++ 5.0 features.
(Sets __cplusplus macro to
If the -compat option is not specified, -compat=5
is assumed. If only -compat is specified, -com-
pat=4 is assumed.
The -xarch=v9 option and the -compat[=4] option
are not supported when used together.
From: Michael Elizabeth Chastain [mailto:firstname.lastname@example.org]
Sent: Friday, March 23, 2001 9:23 AM
To: email@example.com; firstname.lastname@example.org
Subject: Re: using GDB 5 on Solaris 7 with Sun WS5.0
> I have heard that someone might have changed GDB to do "lazy" loading
> of symbols by reading them from the *.o instead of the exe and thus
> obviating the need for "-xs", but I don't see any mention of this in
> any of the source.
That is the "partial symtab" (psymtab) code.
> 2) the name mangling/vtable scheme of Sun WS5.0 is apparently using the
> ISO/ANSI ABI standard and GDB cannot deal with it (it needs an new BFD to
> handle this? or is there a generic name de-mangling place in the code?)
Recent snapshots of gdb, and the current CVS version of gdb, operate with
the new multi-vendor C++ ABI:
If you could provide a URL or an ISO reference number for that "ISO/ANSI
ABI standard", I could check if it's the same as the "new ABI" standard
that we're working on supporting.
Michael Elizabeth Chastain
"love without fear"