From aca7c64aa69a4e14a2dd57779cd206a5aa15f649 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Sun, 16 Mar 2014 00:09:30 -0700
Subject: * configure: Detect _wspawn* functions.

* stream.c (run): Implement using _wspawnvp on MinGW.
---
 ChangeLog |  6 ++++++
 configure | 21 +++++++++++++++++++++
 stream.c  | 24 ++++++++++++++++++++++++
 3 files changed, 51 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 2bd7511f..d7b929fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2014-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Detect _wspawn* functions.
+
+	* stream.c (run): Implement using _wspawnvp on MinGW.
+
 2014-03-15  Kaz Kylheku  <kaz@kylheku.com>
 
 	* parser.l: Bugfix. When handling a backslash-newline continuation
diff --git a/configure b/configure
index ff7f67fa..f20ec31d 100755
--- a/configure
+++ b/configure
@@ -1720,6 +1720,27 @@ else
   printf "no\n"
 fi
 
+printf "Checking for _wspawvp ... "
+
+cat > conftest.c <<!
+#include "config.h"
+#include <process.h>
+#include <wchar.h>
+
+int main(int argc, char **argv)
+{
+  wchar_t *wargv[] = { L"foo", L"bar", 0 };
+  int r = _wspawnlp(_P_WAIT, L"foo", wargv);
+  return 0;
+}
+!
+if conftest ; then
+  printf "yes\n"
+  printf "#define HAVE_WSPAWN 1\n" >> config.h
+else
+  printf "no\n"
+fi
+
 #
 # Dependent variables
 #
diff --git a/stream.c b/stream.c
index 14ec811b..338f62d8 100644
--- a/stream.c
+++ b/stream.c
@@ -2338,6 +2338,30 @@ static val run(val name, val args)
     return status == 0 ? zero : nil;
   }
 }
+#elif HAVE_WSPAWN
+static val run(val command, val args)
+{
+  const wchar_t **wargv = 0;
+  val iter;
+  int i, nargs, status;
+
+  args = default_bool_arg(args);
+  nargs = c_num(length(args)) + 1;
+
+  wargv = (const wchar_t **) chk_malloc((nargs + 2) * sizeof *wargv);
+
+  for (i = 0, iter = cons(command, args); iter; i++, iter = cdr(iter))
+    wargv[i] = c_str(car(iter));
+  wargv[i] = 0;
+
+  status = _wspawnvp(_P_WAIT, c_str(command), wargv);
+ 
+  for (i = 0; i < nargs; i++)
+    free((void *) wargv[i]);
+  free((void *) wargv);
+
+  return (status < 0) ? nil : num(status);
+}
 #else
 static val run(val command, val args)
 {
-- 
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