tree a86c044f7d8a3770cdfc66dbec31dde61a4ce7f6
parent 4db379fbdb7648128faa0132d631e0484a821bfd
author Zach Clark <zach@ibm.com> 1610146057 -0600
committer Zach Clark <zach@ibm.com> 1610146346 -0600

Support incremental builds in Hostboot

Previously, on every build, the makefile for the Hostboot package was
updating the timestamp of a Hostboot source file on which nearly all
other Hostboot files have a dependency.  This causes files that
haven't changed to be rebuilt, which takes a lot of time.

This commit changes the makefile to only update the relevant file if
it needs to do so. This speeds up Hostboot rebuilds by a large factor.