On Tue, Apr 04, 2006 at 04:24:30PM +0100, Al Viro wrote:
> make O=../test kernel/sched.o produces kernel/sched.o is source tree
> now. AFAICS, breakage started in 06300b21f4c79fd1578f4b7ca4b314fbab61a383
> (kbuild: support building individual files for external modules).
Fixed by patch below.
Tested with diverse combinations of separate outut directories and
external modules.
The target-dir variable was renamed to build-dir to better relect usage.
Also added dependency on prepare for %.ko targets so it can be used on
a cleaned tree.
Sam
diff --git a/Makefile b/Makefile
index b401942..131950c 100644
--- a/Makefile
+++ b/Makefile
@@ -1275,40 +1275,43 @@ kernelversion:
# Single targets
# ---------------------------------------------------------------------------
-# The directory part is taken from first prerequisite, so this
-# works even with external modules
+# Single targets are compatible with:
+# - build whith mixed source and output
+# - build with separate output dir 'make O=...'
+# - external modules
+#
+# target-dir => where to store outputfile
+# build-dir => directory in kernel source tree to use
+
+ifeq ($(KBUILD_EXTMOD),)
+ build-dir = $(dir $@)
+ target-dir = $(dir $@)
+else
+ zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
+ build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
+ target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
+endif
+
%.s: %.c prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.i: %.c prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.c prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.lst: %.c prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.s: %.S prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.S prepare scripts FORCE
- $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
-
-# For external modules we shall include any directory of the target,
-# but usual case there is no directory part.
-# make M=`pwd` module.o => $(dir $@)=./
-# make M=`pwd` foo/module.o => $(dir $@)=foo/
-# make M=`pwd` / => $(dir $@)=/
-
-ifeq ($(KBUILD_EXTMOD),)
- target-dir = $(@D)
-else
- zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
- target-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
-endif
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-/ %/: scripts prepare FORCE
+# Modules
+/ %/: prepare scripts FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
- $(build)=$(target-dir)
-%.ko: scripts FORCE
+ $(build)=$(build-dir)
+%.ko: prepare scripts FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
- $(build)=$(target-dir) $(@:.ko=.o)
+ $(build)=$(build-dir) $(@:.ko=.o)
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
# FIXME Should go into a make.lib or something
-
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