svn path=/branches/xmlbuildsystem/; revision=14728
# Accepted environment variables:
#
+# ROS_PREFIX
+# This variable specifies the prefix of the MinGW installation. On Windows
+# a prefix is usually not needed, but on linux it is usually "mingw32-". If
+# not present and no executable named "gcc" can be found, then the prefix is
+# assumed to be "mingw32-".
+#
# ROS_INTERMEDIATE
# This variable controls where to put intermediate files. Intermediate
# files are generated files that are needed to generate the final