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https://github.com/TeX-Live/texlive-source/commit/bb307f8bd91c5ea4f191b9c788056470626893b7
From bb307f8bd91c5ea4f191b9c788056470626893b7 Mon Sep 17 00:00:00 2001
From: Karl Berry <karl@freefriends.org>
Date: Thu, 2 Feb 2023 22:57:47 +0000
Subject: [PATCH] avoid implicit wait and exit declarations for C99
git-svn-id: svn://tug.org/texlive/trunk/Build/source@65717 c570f23f-e606-0410-a88d-b1316a301751
--- a/configure
+++ b/configure
@@ -16406,6 +16406,9 @@ else $as_nop
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
@@ -16427,7 +16430,7 @@ main (void)
while (wait(&status) != child)
;
- exit(
+ _exit(
/* Was there some problem with vforking? */
child < 0
--- a/m4/xdvi-func-setsid-in-fork.m4
+++ b/m4/xdvi-func-setsid-in-fork.m4
@@ -22,6 +22,9 @@ AC_DEFUN([XDVI_FUNC_SETSID_IN_VFORK],
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif]],
@@ -40,7 +43,7 @@ AC_DEFUN([XDVI_FUNC_SETSID_IN_VFORK],
while (wait(&status) != child)
;
- exit(
+ _exit(
/* Was there some problem with vforking? */
child < 0
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