Hi Marcus,
On 09/03/15 13:07, Marcus Meissner wrote:
From d8df64a7261bc0febcdd48d4ed818dc1f36f3471 Mon Sep 17 00:00:00 2001 From: Marcus Meissner meissner@suse.de Date: Thu, 3 Sep 2015 12:11:13 +0200 Subject: [PATCH] widl: implement a move-if-changed logic
This avoids unnecessary rebuilds if the generated code by widl does not change.
While I like the idea and it would often save a bug chunk of build time, I don't think it would work well with make. If you don't touch output file, then following make invocation will execute widl again, which is undesired.
Thanks, Jacek
On Thu, Sep 03, 2015 at 06:54:05PM +0200, Jacek Caban wrote:
Hi Marcus,
On 09/03/15 13:07, Marcus Meissner wrote:
From d8df64a7261bc0febcdd48d4ed818dc1f36f3471 Mon Sep 17 00:00:00 2001 From: Marcus Meissner meissner@suse.de Date: Thu, 3 Sep 2015 12:11:13 +0200 Subject: [PATCH] widl: implement a move-if-changed logic
This avoids unnecessary rebuilds if the generated code by widl does not change.
While I like the idea and it would often save a bug chunk of build time, I don't think it would work well with make. If you don't touch output file, then following make invocation will execute widl again, which is undesired.
I thought about this and it seems not easily solvable.
One dependency which could be avoided is tools/widl which due to config.h inclusion is rebuilt on reconfigure. Of course this would be hoping that the output of widl is stable.
So yeah, not really possible.
Ciao, Marcus
-
Jacek Caban -
Marcus Meissner