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[Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2
From: |
Ludovic Courtès |
Subject: |
[Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2 |
Date: |
Thu, 20 Mar 2008 13:41:44 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) |
Hi,
Simon Josefsson <address@hidden> writes:
> Anyway, I don't see any harm in setting the compiler in C99 mode if the
> compiler supports it.
One possible problem is that you end up writing C99 code, using
C99-specific things like, say, C++-style comments, declarations not at
the beginning of a block, etc. These things will break with non-C99
compilers.
> GnuTLS optionally use several C99 features, such
> as __func__, CPP macros with flexible number of parameters, stdbool.h.
C99 headers can usually be used even without a C99 compiler (well,
provided they're available, of course).
> If the compiler doesn't supports those, we'll disable those features or
> use our gnulib-workarounds, which seems sub-optimal. We want our code
> to work with C99.
To "work with C99" or to "require C99"? Surely either is acceptable,
but I have the impression that there's a slow movement towards the
latter.
> I still don't see how this problem occur though. Exactly how is the
> gmpz_abs symbol pulled into guile/src/*.o files? If gmpz_abs is inline
> in gmp.h, should that be inlined into the guile code? Does setting the
> compiler in gnu99 mode also set the linker in a different mode, that
> causes this problem?
<libguile.h> includes <libguile/numbers.h>, which in turn includes
<gmp.h>, which contains declarations and "extern inline" definitions (in
the "GNU89" sense).
Why it `__gmpz_abs' ends up as a global, exported symbol in the `.o'
objects produced on MacOS X, I have now idea. On GNU/Linux with GCC
4.2.3, it never happens, whether compiled with `-std=c99' or not.
Help is welcome. :-)
Thanks,
Ludovic.
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, (continued)
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/18
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Ludovic Courtès, 2008/03/19
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/19
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Simon Josefsson, 2008/03/19
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Matthias Urlichs, 2008/03/19
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Simon Josefsson, 2008/03/19
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Ludovic Courtès, 2008/03/19
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/19
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Ludovic Courtès, 2008/03/20
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Simon Josefsson, 2008/03/20
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2,
Ludovic Courtès <=
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Simon Josefsson, 2008/03/20
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Ludovic Courtès, 2008/03/27
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Simon Josefsson, 2008/03/20
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/20
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/20
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/20
- Re: [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, David Reiser, 2008/03/20
- [Help-gnutls] Re: duplicate symbols complaint on Mac OS X 10.5.2, Ludovic Courtès, 2008/03/27