Messages in this thread | | | Date | Sun, 31 Jul 2005 10:44:06 +0200 | From | Sam Ravnborg <> | Subject | Re: [HOWTO] set extra_cflags to indicate compilation against -mm kernels |
| |
On Sat, Jul 30, 2005 at 05:29:21PM -0400, Michael Krufky wrote: > With the addition of topdir-mm.patch into the -mm tree (since > 2.6.13-rc3-mm2), it is now possible for Makefile to detect whether a cvs > subtree is being built against -mm or not... -mm kernels now have a .mm > file in the top level directory. > > inside Makefile: > > mm-kernel := $(TOPDIR)/.mm > ifneq ($(mm-kernel),) > MM_KERNEL_CFLAGS := -DMM_KERNEL=$(shell cat $(mm-kernel) 2> /dev/null) > ifneq ($(MM_KERNEL_CFLAGS),-DMM_KERNEL=) > EXTRA_CFLAGS += $(MM_KERNEL_CFLAGS) > endif > endif
Hi Michael. The content of the .mm file seems to be insignificant - '1'. The important issue is that the file is present. Also please do not use $(TOPDIR) - it is deprecated.
The following is enough: EXTRA_CFLAGS += $(if $(wildcard $(srctree)/.mm), -DMM_KERNEL)
If the file exist in the root of the kernel src tree MM_KERNEL will be added to EXTRA_CFLAGS.
Sam - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |