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authorMichal Marek <mmarek@suse.com>2015-10-27 14:02:24 +0100
committerMichal Marek <mmarek@suse.com>2015-11-25 11:23:25 +0100
commitcf4f21938e13ea1533ebdcb21c46f1d998a44ee8 (patch)
treeb26af8415bc9f916124e27b4bbfd3209270e40f6 /scripts
parent0046a46a8f93f5b99b499118779521ba3b017d69 (diff)
downloadlinux-cf4f21938e13ea1533ebdcb21c46f1d998a44ee8.tar.bz2
kbuild: Allow to specify composite modules with modname-m
This allows to write drm-$(CONFIG_AGP) += drm_agpsupport.o without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support this syntax for modules, since built-in code depending on something modular cannot work and init/Makefile actually relies on the current semantics. There are a few drivers which adapted to the current semantics out of necessity; these are fixed to also work when the respective subsystem is modular. Acked-by: Peter Chen <peter.chen@freescale.com> [chipidea] Signed-off-by: Michal Marek <mmarek@suse.com>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.build8
-rw-r--r--scripts/Makefile.lib4
2 files changed, 8 insertions, 4 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 01df30af4d4a..2c47f9c305aa 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -372,10 +372,14 @@ endif
# <composite-object>-objs := <list of .o files>
# or
# <composite-object>-y := <list of .o files>
+# or
+# <composite-object>-m := <list of .o files>
+# The -m syntax only works if <composite object> is a module
link_multi_deps = \
$(filter $(addprefix $(obj)/, \
$($(subst $(obj)/,,$(@:.o=-objs))) \
-$($(subst $(obj)/,,$(@:.o=-y)))), $^)
+$($(subst $(obj)/,,$(@:.o=-y))) \
+$($(subst $(obj)/,,$(@:.o=-m)))), $^)
quiet_cmd_link_multi-y = LD $@
cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
@@ -390,7 +394,7 @@ $(call multi_depend, $(multi-used-y), .o, -objs -y)
$(multi-used-m): FORCE
$(call if_changed,link_multi-m)
@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
-$(call multi_depend, $(multi-used-m), .o, -objs -y)
+$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
targets += $(multi-used-y) $(multi-used-m)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 79e86613712f..e18957b7a830 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -48,7 +48,7 @@ subdir-ym := $(sort $(subdir-y) $(subdir-m))
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
-multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
+multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m))))
multi-used := $(multi-used-y) $(multi-used-m)
single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
@@ -67,7 +67,7 @@ obj-dirs := $(dir $(multi-objs) $(obj-y))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
-real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
+real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
# Add subdir path