Re: [Xen-devel] [RFC PATCH 6/8] Config.mk: expand cc-ver a bit

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Oct 07, 2016 at 03:52:53AM -0600, Jan Beulich wrote:
> >>> On 06.10.16 at 16:37, <wei.liu2@xxxxxxxxxx> wrote:
> > --- a/Config.mk
> > +++ b/Config.mk
> > @@ -112,17 +112,17 @@ endef
> >  
> >  cc-options-add = $(foreach o,$(3),$(call cc-option-add,$(1),$(2),$(o)))
> >  
> > -# cc-ver: Check compiler is at least specified version. Return boolean 
> > 'y'/'n'.
> > -# Usage: ifeq ($(call cc-ver,$(CC),0x030400),y)
> > +# cc-ver: Check compiler against the version requirement. Return boolean 
> > 'y'/'n'.
> > +# Usage: ifeq ($(call cc-ver,$(CC),-ge,0x030400),y)
> >  cc-ver = $(shell if [ $$((`$(1) -dumpversion | awk -F. \
> > -           '{ printf "0x%02x%02x%02x", $$1, $$2, $$3}'`)) -ge $$(($(2))) 
> > ]; \
> > +           '{ printf "0x%02x%02x%02x", $$1, $$2, $$3}'`)) $(2) $$(($(3))) 
> > ]; \
> >             then echo y; else echo n; fi ;)
> >  
> >  # cc-ver-check: Check compiler is at least specified version, else fail.
> >  # Usage: $(call cc-ver-check,CC,0x030400,"Require at least gcc-3.4")
> >  cc-ver-check = $(eval $(call cc-ver-check-closure,$(1),$(2),$(3)))
> >  define cc-ver-check-closure
> > -    ifeq ($$(call cc-ver,$$($(1)),$(2)),n)
> > +    ifeq ($$(call cc-ver,$$($(1)),-ge,$(2)),n)
> 
> Could you keep the dash in the macro, making such invocations look
> a little more "normal"?
> 

NP. Changed in my tree.

Wei.

> Jan
> 

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