Add a wrapper script called 'configure' at the top level, which runs

the real configure script from the unix subdirectory, but with cwd
unchanged so that you end up doing a VPATH build in the top-level
source directory.

Should, ideally, placate the people who expect 'configure' to be at
the top level, while still letting _me_ keep all the Unix-specific
stuff in the Unix subdirectory.

[originally from svn r9241]

README

@@ -65,8 +65,12 @@ For building on Unix:
 
  - unix/configure is for Unix and GTK. If you don't have GTK, you
    should still be able to build the command-line utilities (PSCP,
-   PSFTP, Plink, PuTTYgen) using this script. To use it, change
-   into the `unix' subdirectory, run `./configure' and then `make'.
+   PSFTP, Plink, PuTTYgen) using this script. To use it, change into
+   the `unix' subdirectory, run `./configure' and then `make'. Or you
+   can do the same in the top-level directory (we provide a little
+   wrapper that invokes configure one level down), which is more like
+   a normal Unix source archive but doesn't do so well at keeping the
+   per-platform stuff in each platform's subdirectory; it's up to you.
 
    Note that Unix PuTTY has mostly only been tested on Linux so far;
    portability problems such as BSD-style ptys or different header file

configure

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+$(echo "$0" | sed '$s!configure$!unix/configure!') "$@"