--- p/units/pipesc.c.orig	Mon Oct 25 19:45:12 2004
+++ p/units/pipesc.c	Fri Dec 17 02:16:24 2004
@@ -34,6 +34,12 @@
 
 #define GLOBAL(decl) decl; decl
 
+#ifdef __MINGW32__
+#define SPAWN_ARG_CONST const
+#else
+#define SPAWN_ARG_CONST
+#endif
+
 /* Keep this consistent with the one in pipes.pas */
 #if !(defined (MSDOS) || defined (__MINGW32__))
 
@@ -115,7 +121,7 @@
 #include <fcntl.h>
 #include <process.h>
 
-GLOBAL (int _p_CPipe (char *path, char *argv[], char *envp[], char *name_stdin, char *name_stdout, char *name_stderr, void (*ChildProc) ()))
+GLOBAL (int _p_CPipe (char *path, SPAWN_ARG_CONST char *argv[], SPAWN_ARG_CONST char *envp[], char *name_stdin, char *name_stdout, char *name_stderr, void (*ChildProc) ()))
 {
   int executable = *path && !access (path, X_OK), save_stdin = -1, save_stdout = -1, save_stderr = -1, h, r;
   if (*path && !executable)
@@ -417,8 +423,8 @@
 /* This is a kludge to get around the Microsoft C spawn functions' propensity
    to remove the outermost set of double quotes from all arguments. */
 
-static char * const *fix_argv (char **argvec);
-static char * const *
+static SPAWN_ARG_CONST char * const *fix_argv (char **argvec);
+static SPAWN_ARG_CONST char * const *
 fix_argv (argvec)
      char **argvec;
 {
@@ -448,7 +454,7 @@
         argvec[i] = temp;
       }
 
-  return (char * const *) argvec;
+  return (SPAWN_ARG_CONST char * const *) argvec;
 }
 
 #endif /* ! defined (__CYGWIN__) */