linux-kernel - howto make define seen in all files?

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Message-Id: <201308180556.45833.lkml@tigusoft.pl>
Date:	Sun, 18 Aug 2013 05:56:45 +0200
From:	"lkml@...usoft.pl" <lkml@...usoft.pl>
To:	linux-kernel@...r.kernel.org
Subject: howto make define seen in all files?

Hi, I want to provide a general defined macro like __MY__TIME__ (for 
determinictic build) and that symbol should be seen as #define or -D... to gcc 
in all files;

Value of __MY_TIME__ is determined once, at start of build.

I was using file scripts/mkcompile_h as in the attached .diff patch, worked in 
3.2.48 but in 3.2.50 files do not see the value _MY_BUILD__TIME__

View attachment "linux-3.2.48-deterministic-build.diff" of type "text/x-patch" (3617 bytes)