* Makefile: use cp -r to install the library

* ceval.c: use #ifdef COMPAT_HACKS instead of #if 0
* Makefile: fix to make clmodule.c compile;
  make config.o dependent on libpython.a (so date is always correct)
* timemodule.c: now sleep() also takes a float argument.
* posixmodule.c: added nice().

Modules/posixmodule.c

@@ -1,6 +1,6 @@
 /***********************************************************
-Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
-Netherlands.
+Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
+Amsterdam, The Netherlands.
 
                         All Rights Reserved
 
@@ -358,6 +358,23 @@ posix_mkdir(self, args)
 	return posix_strint(args, mkdir);
 }
 
+#ifndef MSDOS
+static object *
+posix_nice(self, args)
+	object *self;
+	object *args;
+{
+	int increment, value;
+
+	if (!getargs(args, "i", &increment))
+		return NULL;
+	value = nice(increment);
+	if (value == -1)
+		return posix_error();
+	return newintobject((long) value);
+}
+#endif
+
 #ifdef i386
 int
 rename(from, to)
@@ -919,6 +936,9 @@ static struct methodlist posix_methods[] = {
 	{"listdir",	posix_listdir},
 	{"lstat",	posix_lstat},
 	{"mkdir",	posix_mkdir},
+#ifndef MSDOS
+	{"nice",	posix_nice},
+#endif
 	{"readlink",	posix_readlink},
 	{"rename",	posix_rename},
 	{"rmdir",	posix_rmdir},