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Re: basic-improvements merge status
- From: Gabriel Dos Reis <gdr at integrable-solutions dot net>
- To: David Edelsohn <dje at watson dot ibm dot com>
- Cc: Jan Hubicka <jh at suse dot cz>, Zack Weinberg <zack at codesourcery dot com>, gcc at gcc dot gnu dot org, libstdc++ at gcc dot gnu dot org
- Date: 17 Dec 2002 09:46:52 +0100
- Subject: Re: basic-improvements merge status
- Organization: Integrable Solutions
- References: <200212162226.RAA23850@makai.watson.ibm.com>
David Edelsohn <dje@watson.ibm.com> writes:
| >>>>> Jan Hubicka writes:
|
| >> #ifndef HAVE_SINF
| >> float
| >> sinf(float x)
| >> {
| >> return (float) sin(x);
| >> }
| >> #endif
| >>
| >> is being compiled as
|
| Jan> I think we can deal with -fno-builtin-fsin to avoid gcc from being
| Jan> active on optimizing this.
| Jan> The name sinf is reserved by C90 standard, so this is not valid C.
|
| Maybe libstdc++-v3/libmath/stubs.c should be compiled with
| -fno-builtins.
This is papering over broken assumptions made by the transformation.
Moreover, not all functions are missing at the same time. So
-fno-builtin will be overly pessimistic an assumption. There ought to
be a way to tell the compiler which library function not to optimize.
-- Gaby