[gentoo-dev] RFC: toolchain.eclass prefix support

[Benda Xu]

Hi,

Please help me review the patch attached.

This patch has 5 main kinds of modifications to the eclass,

  * Define ED and EROOT for EAPI 0, 1 and 2.
  * Add ${EPREFIX} to ${PREFIX} and quote the variables.
  * Strip ${EPREFIX} if used with a ebuild helper.
  * call fix_libtool_files.sh by name, because /usr/sbin is in PATH,
    and no need to write as ${EPREFIX}/usr/sbin/fix_libtool_files.sh
  * Preserve PATH when calling gcc-config.

Benda