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Re: OpenVMS needs __UNIX_PUTC macro defined for configure tests.
From: |
Bruno Haible |
Subject: |
Re: OpenVMS needs __UNIX_PUTC macro defined for configure tests. |
Date: |
Thu, 06 Jul 2017 16:33:21 +0200 |
User-agent: |
KMail/5.1.3 (Linux/4.4.0-83-generic; KDE/5.18.0; x86_64; ; ) |
John E. Malmberg wrote:
> >> * Config.h
> >> OpenVMS needs __UNIX_PUTC macro defined for putc_unlocked
> >> and friends to be visible.
> >
> > The right place to do this (for a macro that affects multiple
> > gnulib modules) is the 'extensions' module.
>
> This makes it visible to the modules being built, but not to the tests
> in the configure script.
No, m4/extensions.m4 is written in such a way that all definitions
inside AC_USE_SYSTEM_EXTENSIONS become active before the first test
in the configure script gets run.
> Also on OpenVMS __UNIX_PUTC macro can not be used currently with the C++
> compiler
Then how about
#ifndef __cplusplus
# define __UNIX_PUTC 1
#endif
?
> So would the fix be to just put all the logic in unlocked-io.h for it to
> make visible the OpenVMS unlocked IO routines for C only?
I guess that this would not work:
#include <stdio.h>
#include "unlocked-io.h"
would not make the unlocked IO routines visible, because <stdio.h> gets skipped
when it gets included a second time. Right?
Bruno