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Re: [Qemu-devel] [PATCH] configure: Fix curses probe for older ncurses
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH] configure: Fix curses probe for older ncurses |
Date: |
Mon, 27 Nov 2017 13:02:04 +0100 |
On 26 November 2017 at 22:13, Brad Smith <address@hidden> wrote:
> Fix the curses probe with older ncurses (.e.g. 5.7, as used by OpenBSD).
>
> ncurses 5.7 requires _XOPEN_SOURCE_EXTENDED to be defined for WACS_*
> constants.
ncurses 5.7 was released in 2008 and is now 9 years old. Why
is OpenBSD still using such an ancient version?
> Signed-off-by: Brad Smith <address@hidden>
>
>
> diff --git a/configure b/configure
> index 0c6e7572db..9715b9c2cc 100755
> --- a/configure
> +++ b/configure
> @@ -3186,7 +3186,7 @@ EOF
> IFS=:
> for curses_inc in $curses_inc_list; do
> # Make sure we get the wide character prototypes
> - curses_inc="-DNCURSES_WIDECHAR $curses_inc"
> + curses_inc="-DNCURSES_WIDECHAR -D_XOPEN_SOURCE_EXTENDED $curses_inc"
I'm a bit wary of this because we've found in the past that
defining _XOPEN_* defines breaks compilation with some
C libraries which assume that if you define _XOPEN_whatever
it means "only that X/Open stuff and no OS-specific extras",
and we depend on the OS-specific extras.
That said, I did a test compile on OSX, which was the
one that had trouble previously, so this may be OK. I think
I'd rather leave it until after 2.11 releases, though.
thanks
-- PMM