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bug#6170: 24.0.50; Compiling on solaris2.10 with gcc doesn't define allo
From: |
Dan Nicolaescu |
Subject: |
bug#6170: 24.0.50; Compiling on solaris2.10 with gcc doesn't define alloca |
Date: |
Wed, 02 Jun 2010 05:24:36 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) |
Lawrence Mitchell <wence@gmx.li> writes:
> Dan Nicolaescu wrote:
>> Lawrence Mitchell <wence@gmx.li> writes:
>
>>> On this system, <stdlib.h> is provided by Sun and therefore
>>> doesn't define alloca, unlike on a typical GNU/linux system where
>>> <stdlib.h> contains the following:
>
>>> | #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
>>> | # include <alloca.h>
>>> | #endif /* Use GNU, BSD, or misc. */
>
>>> When compiling emacs with gcc, alloca is therefore undefined.
>>> The culprit is this snippet in configure.in:
>
>>> | #ifndef __GNUC__
>>> | # ifdef HAVE_ALLOCA_H
>>> | # include <alloca.h>
>>> | # else /* AIX files deal with #pragma. */
>>> | # ifndef alloca /* predefined by HP cc +Olibcalls */
>>> | char *alloca ();
>>> | # endif
>>> | # endif /* HAVE_ALLOCA_H */
>>> | #endif /* __GNUC__ */
>
>
>> "info autoconf" says that this is the proper way to do it:
>
>> #ifdef HAVE_ALLOCA_H
>> # include <alloca.h>
>> #elif defined __GNUC__
>> # define alloca __builtin_alloca
>> #elif defined _AIX
>> # define alloca __alloca
>> #elif defined _MSC_VER
>> # include <malloc.h>
>> # define alloca _alloca
>> #else
>> # include <stddef.h>
>> # ifdef __cplusplus
>> extern "C"
>> # endif
>> void *alloca (size_t);
>> #endif
>
>> Not sure we need the last #else part, or the _MSC_VER part...
>
> Is there any movement on getting this fix, or something like it,
> installed? It doesn't seem like a controversial change.
Should be fixed now.
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Dan Nicolaescu <=