On Tue, Feb 22, 2005 at 11:39:42AM -0800, Ben Pfaff wrote:
[deletia]
> The documentation for AC_MALLOC_FUNC in the autoconf manual shows
> you what replacement you should provide:
>
> #if HAVE_CONFIG_H
> # include <config.h>
> #endif
> #undef malloc
>
> #include <sys/types.h>
>
> void *malloc ();
>
> /* Allocate an N-byte block of memory from the heap.
> If N is zero, allocate a 1-byte block. */
>
> void *
> rpl_malloc (size_t n)
> {
> if (n == 0)
> n = 1;
> return malloc (n);
> }
This isn't a reasonable solution when cross compiling. Adding code to
a complex package, especially when there are many packages in a
project, is prohibitive.
Paul Eggert made the reasonable suggestion that defining the macro
ahead of time, in the environment, bypasses the configuration scripts
logic to force replacement of malloc. A much better solution than
adding code
export ac_cv_func_malloc_0_nonnull=yes
Cheers.
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