[PATCH] be more flexible about creating library archives

New makefile variable introduced: lib-y

The lib-y syntax allows you to do the usual tricks such as:

	lib-$(CONFIG_SMP) += percpu_counter.o

A built-in.o is always present in a directory that list .o files in
either obj-* or lib-*.

In contrast, lib.a is made only when lib-y is defined.

I also updated lib/Makefile, so that crc32.o is now always built-in
if selected. 

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/Makefile b/lib/Makefile
index 75af740c3743f8..897971cc9d1fc2 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -6,18 +6,17 @@
 # unless it's something special (ie not a .c file).
 #
 
-L_TARGET := lib.a
 
-obj-y := errno.o ctype.o string.o vsprintf.o cmdline.o \
+lib-y := errno.o ctype.o string.o vsprintf.o cmdline.o \
 	 bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \
 	 kobject.o idr.o
 
-obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
-obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
-obj-$(CONFIG_SMP) += percpu_counter.o
+lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
+lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
+lib-$(CONFIG_SMP) += percpu_counter.o
 
 ifneq ($(CONFIG_HAVE_DEC_LOCK),y) 
-  obj-y += dec_and_lock.o
+  lib-y += dec_and_lock.o
 endif
 
 obj-$(CONFIG_CRC32)	+= crc32.o