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Re: [Qemu-devel] [PATCH v1 01/40] trace: add build framework for merging
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH v1 01/40] trace: add build framework for merging trace-events files |
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Date: |
Tue, 14 Jun 2016 13:26:10 +0100 |
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User-agent: |
Mutt/1.6.1 (2016-04-27) |
On Thu, Jun 09, 2016 at 05:57:55PM +0100, Daniel P. Berrange wrote:
> +$(BUILD_DIR)/trace-events-all: $(trace-events-y:%=$(SRC_PATH)/%)
> + $(call quiet-command,cat $^ > $@)
$^ needs to be a stable ordering across make invocations and across
machines to avoid thrashing ccache and spuriously renumbering trace
event IDs.
I guess it is stable but just in case anyone knows of a case where $^
would change order without any changes to the actual files (e.g.
readdir(2) returning things in a different order, make parallel jobs,
etc)...
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- [Qemu-devel] [PATCH v1 00/40] Split up the trace-events file, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 02/40] trace: split out trace events for util/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 07/40] trace: split out trace events for hw/block/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 04/40] trace: split out trace events for io/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 06/40] trace: split out trace events for block/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 08/40] trace: split out trace events for hw/char/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 05/40] trace: split out trace events for migration/ directory, Daniel P. Berrange, 2016/06/09
- [Qemu-devel] [PATCH v1 11/40] trace: split out trace events for hw/virtio/ directory, Daniel P. Berrange, 2016/06/09