I have noticed a change in Kbuild behavior when going from 2.6.13.x
to 2.6.14-rc3. I build kernels with a separate objects directory. It
has been my practice since beginning with 2.6 kernels last year, to
put changed files into the objects directory structure to override an
unmodified source tree. Starting with 2.6.14, I find that Makefiles
in the objects directory structure area not used. I find that source
and Kconfig files do override as they used to, but Makefiles do not.
I don't really know if this new behavior is intended or not, but it
sure messes my kernel build methodology up. It looks to me like the
problem was introduced by changes in scripts/Makefile.build. I think
that this is the change causing me trouble:
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -10,8 +10,11 @@ __build:
# Read .config if it exist, otherwise ignore
-include .config
-include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile)
+# The filename Kbuild has precedence over Makefile
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild,
$(kbuild-dir)/Makefile)
+include scripts/Kbuild.include
include scripts/Makefile.lib
ifdef host-progs
Does anyone know if this change in behavior was intended? I realize
that I may be doing something a little bit unusual, but I have been
doing things this way very successfully since at least 2.6.5.
--
Mark Rustad, [email protected]
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