From: Jason Merrill <jason@cygnus.com>
To: martin@mira.isdn.cs.tu-berlin.de (Martin v. Loewis)
Cc: pfeifer@dbai.tuwien.ac.at, egcs@egcs.cygnus.com
Subject: Re: egcs 1.2 C++ ABI (Re: C++: STL 3.2)
Date: Mon, 26 Apr 1999 23:06:00 -0000 [thread overview]
Message-ID: <u9n1zu1ttp.fsf@yorick.cygnus.com> (raw)
In-Reply-To: <199904232313.BAA00817.cygnus.egcs@mira.isdn.cs.tu-berlin.de>
>>>>> Martin v Loewis <martin@mira.isdn.cs.tu-berlin.de> writes:
> So far, I have identified two areas:
> - STL is incompatible. The allocators all changed, resulting in a different
> default argument to any reasonable standard template, thus breaking
> all mangled names.
This is OK; so long as the data structures are similar enough the only harm
would be having two copies of the code in the executable.
> - Some changes to exception handling. g++ now emits __start_cp_handler,
> which is not supported in egcs 1.1 libgcc. So, linking 1.2 compiled
> objects with 1.1 doesn't work.
But it is backward compatible. I don't mind requiring people to use the
newest compiler to link mixed code.
> a) Leave everything as-is, claiming no compatibility.
This is the way it has always been. I think this is fine until the new ABI
is actually deployed, which should wait until it's finished -- and I'm
planning to do that this summer.
Jason
WARNING: multiple messages have this Message-ID
From: Jason Merrill <jason@cygnus.com>
To: martin@mira.isdn.cs.tu-berlin.de (Martin v. Loewis)
Cc: pfeifer@dbai.tuwien.ac.at, egcs@egcs.cygnus.com
Subject: Re: egcs 1.2 C++ ABI (Re: C++: STL 3.2)
Date: Fri, 30 Apr 1999 23:15:00 -0000 [thread overview]
Message-ID: <u9n1zu1ttp.fsf@yorick.cygnus.com> (raw)
Message-ID: <19990430231500.9K7FampAIBKDRJWURCkKgBWLEqSayenVWQR7Dam7I0w@z> (raw)
In-Reply-To: <199904232313.BAA00817.cygnus.egcs@mira.isdn.cs.tu-berlin.de>
>>>>> Martin v Loewis <martin@mira.isdn.cs.tu-berlin.de> writes:
> So far, I have identified two areas:
> - STL is incompatible. The allocators all changed, resulting in a different
> default argument to any reasonable standard template, thus breaking
> all mangled names.
This is OK; so long as the data structures are similar enough the only harm
would be having two copies of the code in the executable.
> - Some changes to exception handling. g++ now emits __start_cp_handler,
> which is not supported in egcs 1.1 libgcc. So, linking 1.2 compiled
> objects with 1.1 doesn't work.
But it is backward compatible. I don't mind requiring people to use the
newest compiler to link mixed code.
> a) Leave everything as-is, claiming no compatibility.
This is the way it has always been. I think this is fine until the new ABI
is actually deployed, which should wait until it's finished -- and I'm
planning to do that this summer.
Jason
next prev parent reply other threads:[~1999-04-26 23:06 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-04-23 7:44 C++: STL 3.2 Gerald Pfeifer
1999-04-23 16:17 ` egcs 1.2 C++ ABI (Re: C++: STL 3.2) Martin v. Loewis
1999-04-24 15:52 ` Chip Salzenberg
1999-04-24 17:26 ` Martin v. Loewis
1999-04-24 18:11 ` Chip Salzenberg
1999-04-30 23:15 ` Chip Salzenberg
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Chip Salzenberg
1999-04-24 23:14 ` Mark Mitchell
1999-04-25 5:16 ` Gerald Pfeifer
1999-04-30 23:15 ` Gerald Pfeifer
1999-04-30 23:15 ` Mark Mitchell
1999-04-30 23:15 ` Martin v. Loewis
1999-04-24 22:28 ` C++: STL 3.2 Jeffrey A Law
1999-04-24 23:11 ` Mark Mitchell
1999-04-25 13:04 ` Martin v. Loewis
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Mark Mitchell
1999-04-25 12:50 ` Martin v. Loewis
1999-04-25 14:46 ` Gabriel Dos_Reis
1999-04-30 23:15 ` Gabriel Dos_Reis
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Jeffrey A Law
[not found] ` <199904232313.BAA00817.cygnus.egcs@mira.isdn.cs.tu-berlin.de>
1999-04-26 23:06 ` Jason Merrill [this message]
1999-04-27 0:06 ` egcs 1.2 C++ ABI (Re: C++: STL 3.2) Martin v. Loewis
1999-04-27 0:18 ` Jason Merrill
1999-04-30 23:15 ` Jason Merrill
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Jason Merrill
1999-04-30 23:15 ` C++: STL 3.2 Gerald Pfeifer
1999-04-27 14:37 egcs 1.2 C++ ABI (Re: C++: STL 3.2) Ross Smith
1999-04-27 15:25 ` Martin v. Loewis
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Ross Smith
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