Dear Joe Hershberger,
> Hi Marek,
[...]
It's a RFC, lemme explain:
> > -$(obj)u-boot-spl.lds: $(LDSCRIPT) depend
> > +$(obj)u-boot-spl.lst: $(LIBS)
> > + $(OBJDUMP) -h $(LIBS) | \
Dump the section headers in all object files
> > + sed -n -e 's/.*\(\.u_boot_list[^ ]\+\).*$$/\1/p' | \
Filter only \.u_boot_list.* symbols
> > + sed 's/\.[^\.]\+$$//' | \
Remove the last .[^.]$ from each line. That's because the last part behind . is
the name of the variable, we don't need that for generation of subsection
boundary symbols.
> > + sed -n ':s /^.\+$$/ { p;s/^\(.*\)\.[^\.]*$$/\1/;b s }' | \
For each line in format .u_boot_list.x.y.z, generate a list of as such (list of
substrings with . as separator):
.u_boot_list.x.y.z
.u_boot_list.x.y
.u_boot_list.x
.u_boot_list
> > + sed -n 's/\./.#/g;h;s/$$/\a/p;g;s/$$/@/p;g;s/$$/~/p;' | \
For each line, print the line thrice, first time append \a at the end, second @
and third ~. Also replace each dot with .# . See [1] and look for the list
under
"The order_end Keyword" section.
> > + LC_COLLATE=C sort -u | \
Sort the list, it's imperative to use the C collating here, because of [1].
This
results in lines ending with \a float above all lines ending with either @ or
continuing with further dots. Same goes for ~, which falls at the end.
> > + sed 's/#//g' | \
Remove the hashes.
> > + sed -n -e '/\a$$/ { s/\./_/g;s/\a$$/__start = .;/p; }'\
> > + -e '/~$$/ { s/\./_/g;s/~$$/__end = .;/p; }'\
> > + -e '/@$$/ { s/\(.*\)@$$/*(SORT(\1.*));/p }' >$@
Replace \a with __start ... so this defines the subsection start marker, ~ with
__end for subsection end marker and lines ending with @ with the
SORT(subsection.*) so they catch the contents of subsection.
> Could you not reuse this complicated logic by defining a make function
> and then call + eval it? Something like this:
Can you elaborate more? I don't quite get it ... :-(
> define list_rule_template
> $(1) : $(2)
> $(OBJDUMP) -h $^ | \
> sed -n -e 's/.*\(\.u_boot_list[^ ]\+\).*$$/\1/p' | \
> sed 's/\.[^\.]\+$$//' | \
> sed -n ':s /^.\+$$/ { p;s/^\(.*\)\.[^\.]*$$/\1/;b s }' | \
> sed -n 's/\./.#/g;h;s/$$/\a/p;g;s/$$/@/p;g;s/$$/~/p;' | \
> LC_COLLATE=C sort -u | \
> sed 's/#//g' | \
> sed -n -e '/\a$$/ { s/\./_/g;s/\a$$/__start = .;/p; }'\
> -e '/~$$/ { s/\./_/g;s/~$$/__end = .;/p; }'\
> -e '/@$$/ { s/\(.*\)@$$/*(SORT(\1.*));/p }' >$@
> endef
> ...
> $(eval $(call list_rule_template,$(obj)u-boot.lst,$(LIBBOARD) $(LIBS)))
> ...
> $(eval $(call list_rule_template,$(obj)u-boot-spl.lst,$(LIBS)))
>
> > +
> > +$(obj)u-boot-spl.lds: $(LDSCRIPT) $(obj)u-boot-spl.lst depend
> >
> > $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - < $< >
> > $@
>
> -Joe
[1] http://pubs.opengroup.org/onlinepubs/007908799/xbd/locale.html
Best regards,
Marek Vasut
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