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| author | Markus Armbruster <armbru@redhat.com> | 2018-02-11 10:35:48 +0100 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2018-03-02 13:14:09 -0600 |
| commit | 907b846653fb3757bf2ab98d6d66f92df34d875f (patch) | |
| tree | d4ea513585b3435789c3f5bccb6ff1b6cc8c0cf3 /linux-user/m68k-sim.c | |
| parent | 3b446a1817289d89844ad77c719bdc44bbcd1198 (diff) | |
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.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180211093607.27351-11-armbru@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[eblake: fix octal constant for python3]
Signed-off-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'linux-user/m68k-sim.c')
0 files changed, 0 insertions, 0 deletions