kbuild: consistently decide when to rebuild a target

Consistently decide when to rebuild a target across all of
if_changed, if_changed_dep, if_changed_rule.
PHONY targets are now treated alike (ignored) for all targets

While add it make Kbuild.include almost readable by factoring out a few
bits to some common variables and reuse this in Makefile.build.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 3cb445cc7432..e2ad2dccccdb 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -191,9 +191,10 @@ define rule_cc_o_c
         $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
         $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \
         $(cmd_modversions)                                                \
-        scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > $(@D)/.$(@F).tmp;  \
+        scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
+                                                      $(dot-target).tmp;  \
         rm -f $(depfile);                                                 \
-        mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd
+        mv -f $(dot-target).tmp $(dot-target).cmd
 endef
 
 # Built-in and composite module parts