[U-Boot] [PATCH 1/3 V2] common: Add symbol handling for generic lists into Makefile
Marek Vasut
marex at denx.de
Tue Sep 25 22:22:25 CEST 2012
Dear Wolfgang Denk,
> Dear Marek Vasut,
>
> In message <1348589520-14395-2-git-send-email-marex at denx.de> you wrote:
> > This patch adds essential components for generation of the contents of
> > the linker section that is used by the linker-generated array. All of
> > the contents is held in a separate file, u-boot.lst, which is generated
> > at runtime just before U-Boot is linked.
>
> ...
>
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -510,7 +510,10 @@ else
> >
> > GEN_UBOOT = \
> >
> > UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \
> > sed -n -e 's/.*\($(SYM_PREFIX)__u_boot_cmd_.*\)/-u\1/p'|sort|
uniq`;\
> >
> > - cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $$UNDEF_SYM
$(__OBJS)
> > \ + UNDEF_LST=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \
> > + sed -n -e 's/.*\($(SYM_PREFIX)__u_boot_list_.*\)/-u\1/p'|sort|
uniq`;\
> > + cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
> > + $$UNDEF_SYM $$UNDEF_LST $(__OBJS) \
>
> I dislike the exact duplication of the commands here.
These shall begone once the cmd stuff is flipped over to these generic lists.
> Would it not make sense to provide some function / script to do that?
How do you like helper.mk ? %^) But see above, I think it'll grow pointless
soon.
> > +$(eval $(call make_u_boot_list, $(obj)u-boot.lst, $(LIBBOARD) $(LIBS)))
> > +$(obj)u-boot.lds: $(LDSCRIPT) $(obj)u-boot.lst
> > + $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$<
>$@
>
> I think this needs a comment to explain what sort of magic you are
> invoking here.
>
> ...
>
> > --- /dev/null
> > +++ b/helper.mk
>
> ...
>
> > + $(OBJDUMP) -h $(2) | \
> > + sed -n -e 's/.*\(\.u_boot_list[^ ]\+\).*$$$$/\1/p' | \
> > + sed 's/\.[^\.]\+$$$$//' | \
> > + sed -n ':s /^.\+$$$$/ { p;s/^\(.*\)\.[^\.]*$$$$/\1/;b s }' | \
> > + sed -n 'h;s/$$$$/\a/p;g;s/$$$$/@/p;g;s/$$$$/~/p;' | \
>
> ...
>
> Why exactly do you need 4 invocations of sed here? Seems just like a
> waste of processes to me.
>
> > LDSCRIPT= $(TOPDIR)/$(CPUDIR)/u-boot-nand_spl.lds
> >
> > +LSTSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lst
>
> BTW: what exactly is "LST" supposed to mean?
LIST ... that's from Supaplex, there was this levels.lst file IIRC ;-)
> > +$(eval $(call make_u_boot_list, $(LSTSCRIPT), $(__OBJS)))
> > +$(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT) $(LSTSCRIPT)
> > + $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
>
> Comment needed.
The eval call ... ?
>
> Best regards,
>
> Wolfgang Denk
Best regards,
Marek Vasut
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