Could you explain me how to define it (and where)?
15.05.2022, 21:25, "Thomas Dickey" <dic...@his.com>:
On Sun, May 15, 2022 at 07:26:34PM -0400, Thomas Dickey wrote:
----- Original Message -----
| From: "alexandre schenberg" <ale.schenb...@yandex.com>
| To: xorg@lists.x.org
| Sent: Sunday, May 15, 2022 7:06:12 PM
| Subject: Malloc error when cross compiling libXt-1.2.1
| Hello. When I try to cross compile libXT 1.2.1 (or any version) for i386, I
| receive:
|
|| configure:18569: checking whether malloc(0) returns NULL
looks like
https://gitlab.freedesktop.org/xorg/lib/libxt/-/blob/edd70bdfbbd16247e3d9564ca51d864f82626eb7/configure.ac
XORG_CHECK_MALLOC_ZERO
which comes from here:
https://gitlab.freedesktop.org/xorg/util/macros/-/blob/master/xorg-macros.m4.in
https://gitlab.freedesktop.org/xorg/util/macros/-/blob/master/xorg-macros.m4.in#L1370
and as explained here
https://www.gnu.org/software/autoconf/manual/autoconf-2.63/html_node/Runtime.html
it's lacking a third choice on the end of the AC_RUN_IFELSE macro.
Overlooked here:
https://gitlab.freedesktop.org/xorg/util/macros/-/commit/af0164c2ded2dcc95b72ca3b9bfbad9b790490f7--
It's used in Alloc.c in Xt:
https://gitlab.freedesktop.org/xorg/lib/libxt/-/blob/edd70bdfbbd16247e3d9564ca51d864f82626eb7/src/Alloc.c#L167
which notwithstanding the comment, the C standard doesn't offer much help:
https://stackoverflow.com/questions/2132273/what-does-malloc0-return
...so the safest thing to do with the macro would be to supply a warning
and define MALLOC_0_RETURNS_NULL
Thomas E. Dickey <dic...@invisible-island.net>
https://invisible-island.net
ftp://ftp.invisible-island.net
