Add a --cross argument to configure to indicate that the generated makefile's make should be like make kernel, and a pb-based bootstrap should rerun configure to build for the host machine instead of the specified target machine.
Also, add support for DESTDIR as a more conventional alternative to the --temproot configure flag. While we're at it, recognize CFLAGS_FOR_BUILD for building bin/zuo.
As part of the change to configure, having CC_FOR_BUILD set does not by itself disable the use of pb for creating or updating boot files. Depending on how boot files are obtained, --force now may be needed when using CC_FOR_BUILD as part of a cross compile that doesn't use --cross.
Add a
--crossargument toconfigureto indicate that the generated makefile'smakeshould be likemake kernel, and a pb-based bootstrap should rerunconfigureto build for the host machine instead of the specified target machine.Also, add support for
DESTDIRas a more conventional alternative to the--temprootconfigure flag. While we're at it, recognizeCFLAGS_FOR_BUILDfor buildingbin/zuo.As part of the change to
configure, havingCC_FOR_BUILDset does not by itself disable the use of pb for creating or updating boot files. Depending on how boot files are obtained,--forcenow may be needed when usingCC_FOR_BUILDas part of a cross compile that doesn't use--cross.Relevant to #847 and #848