From 1ef801e92a5b074a55232c18329986bdb0c4c11b Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Fri, 18 May 2012 12:43:09 -0700
Subject: * configure: New test added for fork, pipe, exec and waitpid.
 Produces HAVE_FORK_STUFF in config.h.

---
 ChangeLog |  5 +++++
 configure | 31 +++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 795d80b2..1137c29b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: New test added for fork, pipe, exec and waitpid.
+	Produces HAVE_FORK_STUFF in config.h.
+
 2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
 
 	* utf8.c (w_fopen, w_popen): Removing unnecessary casts of
diff --git a/configure b/configure
index a612dbf1..1c556808 100755
--- a/configure
+++ b/configure
@@ -1188,6 +1188,37 @@ else
   printf "#define HAVE_GETENVIRONMENTSTRINGS 1\n" >> config.h
 fi
 
+#
+# fork, pipe, exec, waitpid.
+#
+
+printf "Checking for POSIX fork/pipe/exec/waitpid ... "
+
+cat > conftest.c <<!
+#include "config.h"
+#ifdef HAVE_SYS_WAIT
+#include <sys/wait.h>
+#endif
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+  int status, fd[2];
+  pid_t p = fork();
+  (void) execvp(argv[0], argv);
+  (void) waitpid(p, &status, 0);
+  (void) pipe(fd);
+  return 0;
+}
+!
+rm -f conftest
+if ! $make conftest > conftest.err 2>&1 || ! [ -x conftest ] ; then
+  printf "no\n"
+else
+  printf "yes\n"
+  printf "#define HAVE_FORK_STUFF 1\n" >> config.h
+fi
+
 #
 # Check for fields inside struct tm
 #
-- 
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