* Bob Friesenhahn wrote on Mon, Nov 29, 2004 at 10:43:19PM CET:
The use of C++-style comments in open source C code is suspect.
IBM's AIX C compiler does not support them.
xlc -qcpluscmt
which is implied by
xlc -qlanglvl={stdc99,extc99}
when using xlc version = 6. Don't know about
[EMAIL PROTECTED] (Paul Jarc) writes:
E.g., in C90, size_t fits in unsigned long, but in C99, it may not.
This is not a problem for GNU or POSIX-compliant software. The GNU
Coding Standards say that you need not worry about this misfeature of
C99. Also, POSIX 1003.1-2001 requires
* Roger Leigh wrote on Mon, Nov 29, 2004 at 10:59:45PM CET:
So would something like my proposed AC_PROG_CC_C99 macro be good as a
start? It would be optional, and simply check if a compiler
previously found with AC_PROG_CC can be put into a C99 mode. This
would be good for what I want--a
Ralf Wildenhues [EMAIL PROTECTED] writes:
Have you checked there is no compiler which will compile your test
program but not general C99 in its `C89 plus extensions' mode?
The Autoconf Way is to first put the compiler into C99 plus
extensions mode, and then to check how much of C99 (and how
* Paul Eggert wrote on Tue, Nov 30, 2004 at 10:56:29PM CET:
Ralf Wildenhues [EMAIL PROTECTED] writes:
Have you checked there is no compiler which will compile your test
program but not general C99 in its `C89 plus extensions' mode?
The Autoconf Way is to first put the compiler into C99
this portably. If
autoconf could find out how to put a given compiler into C99 mode,
that would be great (in the same way as AC_PROG_GCC_TRADITIONAL
works for KR C).
This sort of test is also needed to test C99 support for anonymous
unions and structures in declarators, which I have run
On Mon, 29 Nov 2004, Roger Leigh wrote:
It would be great if in the next year, AC_PROG_CC could default to
using a C99 compiler. Since it should be backward-compatible with C89
(??), this shouldn't be required, but I would really like to see C99
as the default, with some means of choosing an
compatible, providing you don't use the
new datatypes.
C99 support is nearly fully complete:
http://gcc.gnu.org/c99status.html
and the remaining issues are library issues, hopefully to come with a
future glibc. I do think autoconf should support it--it is the
current C standard.
Regards,
Roger
On Mon, 29 Nov 2004, Roger Leigh wrote:
Do you have a purpose for using C99 other than to intentionally write
non-portable software?
Yes: I would like to use C99 features, and the current autoconf
support isn't adequate. I can portably make use of _Bool, inline and
restrict, but that's it. The
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Bob Friesenhahn [EMAIL PROTECTED] writes:
On Mon, 29 Nov 2004, Roger Leigh wrote:
Do you have a purpose for using C99 other than to intentionally write
non-portable software?
Yes: I would like to use C99 features, and the current autoconf
On Mon, 29 Nov 2004, Roger Leigh wrote:
So would something like my proposed AC_PROG_CC_C99 macro be good as a
start? It would be optional, and simply check if a compiler
previously found with AC_PROG_CC can be put into a C99 mode. This
would be good for what I want--a portable way to get a C99
Roger Leigh [EMAIL PROTECTED] wrote:
Bob Friesenhahn [EMAIL PROTECTED] writes:
Is C99 really 100% upward compatible with the previous version of the
standard, or is it possibly more strict and include type changes which
might impact library ABIs?
I believe that it's entirely compatible,
On Mon, Nov 29, 2004 at 04:36:55PM -0600, Bob Friesenhahn wrote:
On Mon, 29 Nov 2004, Roger Leigh wrote:
So would something like my proposed AC_PROG_CC_C99 macro be good as a
start? It would be optional, and simply check if a compiler
previously found with AC_PROG_CC can be put into a C99
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Are there any tests I can use to specify that I want a C99 compiler?
AC_PROG_CC isn't sufficient.
Would it be possible to introduce a macro to select the C standard
required (KR, C89, C99)?
Ideally it could just detemine that gcc could accept the
Roger Leigh [EMAIL PROTECTED] writes:
Are there any tests I can use to specify that I want a C99 compiler?
AC_PROG_CC isn't sufficient.
IMHO the preferred way is to check for the specific features you need
(eg. with AC_COMPILE_IFELSE) and abort when not provided (or maybe use
workarounds
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Andreas Schwab [EMAIL PROTECTED] writes:
Roger Leigh [EMAIL PROTECTED] writes:
Are there any tests I can use to specify that I want a C99 compiler?
AC_PROG_CC isn't sufficient.
IMHO the preferred way is to check for the specific features you
be great (in the same way as AC_PROG_GCC_TRADITIONAL
works for KR C).
This sort of test is also needed to test C99 support for anonymous
unions and structures in declarators, which I have run into problems
with before.
If there's a way to create AC_PROG_CC_C99 or something similar, that
would
into C99 mode,
that would be great (in the same way as AC_PROG_GCC_TRADITIONAL
works for KR C).
This sort of test is also needed to test C99 support for anonymous
unions and structures in declarators, which I have run into problems
with before.
If there's a way to create AC_PROG_CC_C99 or something
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