Simplify bootstrap script source dir detection

This teaches the bootstrap shell script to detect the CMake source
directory from which it is executed using a simpler idiom.

1 files changed, 2 insertions, 2 deletions

diff --git a/configure b/configure
index dbfec50242..116221602c 100755
--- a/configure
+++ b/configure
@@ -1,3 +1,3 @@
-#! /bin/sh
-cmake_source_dir=`echo $0 | sed -n '/\//{s/\/[^\/]*$//;p;}'`
+#!/bin/sh
+cmake_source_dir=`cd "\`dirname \"$0\"\`";pwd`
 exec "${cmake_source_dir}/bootstrap" "$@"