Markus Armbruster d74daa8fce qapi: Touch generated files only when they change ... A massive number of objects depends on QAPI-generated headers. In my "build everything" tree, it's roughly 4800 out of 5100. This is particularly annoying when only some of the generated files change, say for a doc fix. Improve qapi-gen.py to touch its output files only if they actually change. Rebuild time for a QAPI doc fix drops from many minutes to a few seconds. Rebuilds get faster for certain code changes, too. For instance, adding a simple QMP event now recompiles less than 200 instead of 4800 objects. But adding a QAPI type is as bad as ever; we've clearly got more work to do. Backports commit 907b846653fb3757bf2ab98d6d66f92df34d875f from qemu		2018-03-09 08:51:14 -05:00
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__init__.py	qapi-gen: New common driver for code and doc generators	2018-03-09 08:47:12 -05:00
common.py	qapi: Touch generated files only when they change	2018-03-09 08:51:14 -05:00
events.py	qapi-gen: New common driver for code and doc generators	2018-03-09 08:47:12 -05:00
types.py	qapi-gen: New common driver for code and doc generators	2018-03-09 08:47:12 -05:00
visit.py	qapi-gen: New common driver for code and doc generators	2018-03-09 08:47:12 -05:00