Hi all. I'm trying to build an out-of-tree module, which actually has configuration associated with it (it has a Kconfig file and everything--although that doesn't help me for out-of-tree builds of course).
I have my own makefile which invokes the appropriate kbuild-based make (setting O= etc. on the command line). I know what configure options I want to set as well. So, I wanted to figure out how just pass a couple of -DCONFIG_...=... on the kbuild make command line such that they would be added to the compile line of my out-of-tree modules. Unfortunately I can't use EXTRA_CFLAGS (easily) because the out-of-tree module Makefile sets some flags in EXTRA_CFLAGS itself. All things being equal I'd prefer not to change the module code, or have to duplicate those flags on my invocation line. In normal make, the CPPFLAGS variable contains C preprocessor options and is included in each compile line automatically. I can see that kbuild supports EXTRA_CPPFLAGS and cppflags-y etc. but these seem to have a different purpose; anyway they don't appear on any normal compile line. Is this an oversight? What are these cppflags variables intended for? I'm having a hard time finding where they are used. I also see that I can set KCPPFLAGS on the command line and that works, although I get a warning. Is this (KCPPFLAGS) the intended solution for this type of thing, warning notwithstanding? Or is there another, better way to manage this? BTW, I'm using a relatively old kernel (2.6.31) but I'm interested in comments even if they apply only to newer kernels. Cheers! ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ kbuild-devel mailing list kbuild-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kbuild-devel
