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Re: [Qemu-devel] [PATCH v6 2/8] rule.mak: allow per object cflags and li
From: |
Fam Zheng |
Subject: |
Re: [Qemu-devel] [PATCH v6 2/8] rule.mak: allow per object cflags and libs |
Date: |
Thu, 12 Sep 2013 10:52:51 +0800 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, 09/11 15:43, Paolo Bonzini wrote:
> Il 11/09/2013 15:34, Fam Zheng ha scritto:
> > Adds extract-libs in LINK to expand any "per object libs", the syntax to
> > define
> > such a libs options is like:
> >
> > foo.o-libs := $(CURL_LIBS)
> >
> > in block/Makefile.objs.
> >
> > Similarly,
> >
> > foo.o-cflags := $(FOO_CFLAGS)
> >
> > is also supported.
> >
> > "foo.o" must be listed a nested var (e.g. common-obj-y) to make the
> > option variables effective.
> >
> > Signed-off-by: Fam Zheng <address@hidden>
> > ---
> > rules.mak | 19 ++++++++++++++++---
> > 1 file changed, 16 insertions(+), 3 deletions(-)
> >
> > diff --git a/rules.mak b/rules.mak
> > index 9344c27..b1d53b5 100644
> > --- a/rules.mak
> > +++ b/rules.mak
> > @@ -17,15 +17,17 @@ QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
> > # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
> > QEMU_INCLUDES += -I$(<D) -I$(@D)
> >
> > +extract-libs = $(strip $(foreach o,$1,$($o-libs)))
> > +
> > %.o: %.c
> > - $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS)
> > $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CC $(TARGET_DIR)$@")
> > + $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS)
> > $(QEMU_DGFLAGS) $(CFLAGS) $(address@hidden) -c -o $@ $<," CC
> > $(TARGET_DIR)$@")
> > %.o: %.rc
> > $(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@")
> >
> > ifeq ($(LIBTOOL),)
> > LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o
> > $@ \
> > $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
> > - $(LIBS)," LINK $(TARGET_DIR)$@")
> > + $(call extract-libs,$^) $(LIBS)," LINK $(TARGET_DIR)$@")
> > else
> > LIBTOOL += $(if $(V),,--quiet)
> > %.lo: %.c
> > @@ -41,7 +43,7 @@ LINK = $(call quiet-command,\
> > $(sort $(filter %.o, $1)) $(filter-out %.o, $1) \
> > $(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
> > $(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
> > - $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", " LINK
> > ")"$(TARGET_DIR)$@")
> > + $(call extract-libs,$^) $(LIBS),$(if $(filter %.lo %.la,$^),"lt
> > LINK ", " LINK ")"$(TARGET_DIR)$@")
> > endif
> >
> > %.asm: %.S
> > @@ -114,11 +116,22 @@ $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
> > $(eval save-$2-$1 :=)
> > endef
> >
> > +define fix-obj-vars
> > +$(foreach v,$($1), \
> > + $(if $($v-cflags), \
> > + $(eval $2$v-cflags := $($v-cflags)) \
> > + $(eval $v-cflags := )) \
> > + $(if $($v-libs), \
> > + $(eval $2$v-libs := $($v-libs)) \
> > + $(eval $v-libs := )))
> > +endef
> > +
> > define unnest-dir
> > $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
> > $(eval obj-parent-$1 := $(obj))
> > $(eval obj := $(if $(obj),$(obj)/$1,$1))
> > $(eval include $(SRC_PATH)/$1/Makefile.objs)
> > +$(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(if $(obj),$(obj)/)))
> > $(eval obj := $(obj-parent-$1))
> > $(eval obj-parent-$1 := )
> > $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
> >
>
> I'm not sure this will work for targets in the toplevel directory when
> obj-base is not empty. This can be fixed later though, as part of a
> general revamping of obj-base. Please add a FIXME comment.
>
I'm not sure about the problem, can you give an example, so I can be specific
in the comment?
Thanks,
Fam
- Re: [Qemu-devel] [PATCH v6 1/8] make.rule: fix $(obj) to a real relative path, (continued)
[Qemu-devel] [PATCH v6 2/8] rule.mak: allow per object cflags and libs, Fam Zheng, 2013/09/11
[Qemu-devel] [PATCH v6 3/8] Makefile: introduce common-obj-m and block-obj-m for DSO, Fam Zheng, 2013/09/11
[Qemu-devel] [PATCH v6 4/8] module: implement module loading function, Fam Zheng, 2013/09/11