Re: Is IRIX 6.5 obsolete?

[Bruno Haible]

Simon Josefsson wrote:
> It was configured with:
> 
> CC=c89 CFLAGS="-D_POSIX_SOURCE -I/usr/local/include" ...

Bingo. On many platforms, the _POSIX_SOURCE macro has the effect of
*hiding* declarations, not of enabling them:

$ uname -srv 
IRIX64 6.5 10060437
$ cat foo.c
#include <string.h>
$ cc -E foo.c | grep strdup
extern char *strdup(const char *);
$ c89 -E foo.c | grep strdup
extern char *strdup(const char *);
$ c89 -D_POSIX_SOURCE -E foo.c | grep strdup

Autoconf's and Gnulib's 'extensions' macro does a good job at enabling
most useful declarations, but it cannot prevail against a user who specifies
_POSIX_SOURCE.

Bruno