[PATCH] Symlinks for building external modules

[Andreas Gruenbacher]

Hi Sam,

modules not in the kernel source tree need to locate both the source tree and 
the object tree (O=). Currently, the /lib/modules/$(uname -r)/build symlink 
is the only reference we have; it historically points to the source tree from 
2.4 times. The following patch changes this as follows (this is what we have 
in the current SUSE tree now):

	/lib/modules/$(uname -r)/source ==> source tree
	/lib/modules/$(uname -r)/build ==> object tree

Both links are required for building external modules with:

	make -C /lib/modules/$(uname -r)/source \
		O=/lib/modules/$(uname -r)/build \
		M=$(pwd)


Index: linux-2.6.7-rc2/Makefile
===================================================================
--- linux-2.6.7-rc2.orig/Makefile
+++ linux-2.6.7-rc2/Makefile
@@ -732,9 +732,10 @@ _modinst_:
 		sleep 1; \
 	fi
 	@rm -rf $(MODLIB)/kernel
-	@rm -f $(MODLIB)/build
+	@rm -f $(MODLIB)/{source,build}
 	@mkdir -p $(MODLIB)/kernel
-	@ln -s $(TOPDIR) $(MODLIB)/build
+	@ln -s $(srctree) $(MODLIB)/source
+	@ln -s $(objtree) $(MODLIB)/build
 	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 
 # If System.map exists, run depmod.  This deliberately does not have a


Thanks,
-- 
Andreas Gruenbacher <agruen@xxxxxxx>
SUSE Labs, SUSE LINUX AG
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