From: "Gary Mussar" <Gary.Mussar.mussar@nt.com>
To: choward@intellistor.com, c++-embedded@cygnus.com
Cc: crossgcc@cygnus.com
Subject: RE: gcc vs g++ and linking with as
Date: Thu, 25 Jun 1998 11:26:00 -0000 [thread overview]
Message-ID: <F033F6FEF3F1D111BD150000F8CD1431555356@zcard007.ca.nortel.com> (raw)
The gcc shell will examine the suffix of the source file to determine if the
language is C or C++. The g++ shell assumes the language is C++ no matter
what the source file extension is. As a result, your file has been compiled
as a C++ file rather than a C file and C++ name mangling has been applied.
Dave Hansen suggested using extern "C" around the appropriate sections of
code where you don't want C++ name mangling to occur.
You can tell g++ that the source file is really C rather than C++ with the
-x c option.
You can modify you assembler routines to specify mangled names (which is not
really recommended because the name mangling scheme can change from release
to release).
> -----Original Message-----
> binutils 2.9
> gcc/g++ 2.8.0
>
> Host Sun Sparc Solaris 2.5
> Target Motorola Coldfire (-m5200) a.out object format
>
> ---
>
> Not using stdlib (-nostdlib)
>
> We have some code in assembler, and some in C.
> Compiling with as,gcc and linking with ld works fine.
> Compiling with as,g++ and linking with ld does not work,
> undefined symbols for those things written in assembler.
>
> The .o files output from g++ compilation have exported symbols that
> end in '__Fv' whereas the assembler output .o files don't have
> '__Fv' on the symbols. Is that the problem? Is there
> some way to make it work? What is __Fv?
>
>
> An alternative might be to put the assembly code in
> C/C++ wrapper functions. Any hints/comments that
> would be appreciated also.
>
>
> --
> Chris Howard Fujitsu Computer Products of America
> Longmont, Colorado
next reply other threads:[~1998-06-25 11:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-06-25 11:26 Gary Mussar [this message]
-- strict thread matches above, loose matches on Subject: below --
1998-06-25 11:36 Gary Mussar
[not found] <s5923122.008@btree.com>
1998-06-25 10:53 ` Chris Howard
1998-06-25 9:21 Dave Hansen
1998-06-25 8:32 Chris Howard
1998-06-25 20:20 ` C. M. Heard/VVNET, Inc.
1998-06-25 23:03 ` Stephen Williams
1998-06-26 0:59 ` Robert J. Brown
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