gnulib: import sys_wait

A few sims use this to emulate process syscalls.
Gdb builds seem to still be fine.

3 files changed, 43 insertions, 0 deletions

diff --git a/gnulib/import/m4/gnulib-cache.m4 b/gnulib/import/m4/gnulib-cache.m4
index 689ebd3..5396840 100644
--- a/gnulib/import/m4/gnulib-cache.m4
+++ b/gnulib/import/m4/gnulib-cache.m4
@@ -76,6 +76,7 @@
 #  strstr \
 #  strtok_r \
 #  sys_stat \
+#  sys_wait \
 #  time_r \
 #  unistd \
 #  unsetenv \
@@ -124,6 +125,7 @@ gl_MODULES([
   strstr
   strtok_r
   sys_stat
+  sys_wait
   time_r
   unistd
   unsetenv
diff --git a/gnulib/import/m4/gnulib-comp.m4 b/gnulib/import/m4/gnulib-comp.m4
index 03eff90..54ae5bb 100644
--- a/gnulib/import/m4/gnulib-comp.m4
+++ b/gnulib/import/m4/gnulib-comp.m4
@@ -213,6 +213,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module sys_time:
   # Code from module sys_types:
   # Code from module sys_uio:
+  # Code from module sys_wait:
   # Code from module tempname:
   # Code from module threadlib:
   gl_THREADLIB_EARLY
@@ -777,6 +778,8 @@ AC_DEFUN([gl_INIT],
   AC_PROG_MKDIR_P
   gl_HEADER_SYS_UIO
   AC_PROG_MKDIR_P
+  gl_SYS_WAIT_H
+  AC_PROG_MKDIR_P
   gl_FUNC_GEN_TEMPNAME
   gl_MODULE_INDICATOR([tempname])
   AC_REQUIRE([gl_THREADLIB])
@@ -1184,6 +1187,7 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/sys_time.in.h
   lib/sys_types.in.h
   lib/sys_uio.in.h
+  lib/sys_wait.in.h
   lib/tempname.c
   lib/tempname.h
   lib/time.in.h
@@ -1365,6 +1369,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/sys_time_h.m4
   m4/sys_types_h.m4
   m4/sys_uio_h.m4
+  m4/sys_wait_h.m4
   m4/tempname.m4
   m4/threadlib.m4
   m4/time_h.m4
diff --git a/gnulib/import/m4/sys_wait_h.m4 b/gnulib/import/m4/sys_wait_h.m4
new file mode 100644
index 0000000..96e9ba2
--- /dev/null
+++ b/gnulib/import/m4/sys_wait_h.m4
@@ -0,0 +1,36 @@
+# sys_wait_h.m4 serial 6
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_SYS_WAIT_H],
+[
+  AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
+
+  dnl <sys/wait.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([sys/wait.h])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/wait.h>]],
+    [waitpid])
+])
+
+AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+AC_DEFUN([gl_SYS_WAIT_H_DEFAULTS],
+[
+  GNULIB_WAITPID=0; AC_SUBST([GNULIB_WAITPID])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+])