[PATCH] uml kbuild: avoid useless rebuilds

- Fix some problems with usage of $(targets) (sometimes missing, sometimes
  used badly) that trigger partial rebuilds when doing a rebuild.

- At that purpose, also factor out some common code for symlinks creation.

- Fix a x86-64 build warning, caused by -L/usr/lib, which is anyway useless,
  and invalid in the x86-64 case.

Tested on x86_64 and x86.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 3 insertions, 2 deletions

diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 246f0e7fb4cc..a9dd6933dfc3 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -4,7 +4,7 @@
 #
 
 extra-y := vmlinux.lds
-clean-files := vmlinux.lds.S config.tmp
+clean-files := vmlinux.lds.S
 
 obj-y = checksum.o config.o exec_kern.o exitcode.o \
         helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
@@ -34,7 +34,7 @@ USER_OBJS := $(user-objs-y) config.o helper.o main.o process.o tempfile.o \
 
 include arch/um/scripts/Makefile.rules
 
-targets += config.c
+targets := config.c config.tmp
 
 # Be careful with the below Sed code - sed is pitfall-rich!
 # We use sed to lower build requirements, for "embedded" builders for instance.
diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile
index 3d5177df3504..c3faea21a996 100644
--- a/arch/um/kernel/tt/Makefile
+++ b/arch/um/kernel/tt/Makefile
@@ -4,6 +4,7 @@
 #
 
 extra-y := unmap_fin.o
+targets := unmap.o
 clean-files := unmap_tmp.o
 
 obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \