make reconfigure broken (quoting problem?)

[Martin Buchholz]

Recipe:

( rm -rf build; set -x; bash configure --with-toolchain-type=gcc
--with-boot-jdk=$HOME/jdk/jdk7 && make reconfigure )
=>
configure: Toolchain type gcc --with-boot-jdk=.../jdk/jdk7 is not valid on
this platform.
configure: Valid toolchains: gcc clang.

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Do y'all always build from scratch?