diff options
Diffstat (limited to 'rules/other/Toplevel.make')
| -rw-r--r-- | rules/other/Toplevel.make | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/rules/other/Toplevel.make b/rules/other/Toplevel.make index ef410043d..857500d11 100644 --- a/rules/other/Toplevel.make +++ b/rules/other/Toplevel.make @@ -136,9 +136,53 @@ include $(PTX_DGEN_DEPS_POST) # just the "print" target # ---------------------------------------------------------------------------- +# +# expand variable names +# - if $(1) contains '%' then return all matching variables +# otherwise if $(1) is a defined variable, then return it +# - if no match is found generate an error or return $(1) if make is +# called with '-k' +# +define ptx/check-expand +$(or $(filter $(1),$(.VARIABLES)),$(if $(filter k,$(MAKEFLAGS)),$(1),$(error ##$(1)##))) +endef + +# +# print the given variable +# if PTXDIST_VERBOSE=1 then prefix it with '<name>=' +# +define ptx/print-var +$(info $(if $(filter 1,$(PTXDIST_VERBOSE)),$(1)=)$(call add_quote,$($(1)))) +endef + +# +# expand $(1) to one or more variables and print each one +# +define ptx/print-vars +$(foreach v,$(call ptx/check-expand,$(1)),$(call ptx/print-var,$(v))) +endef + +# +# Pattern target to allow printing variable +# $(filter ..) is used to match against all existing variables so patterns +# containing '%' can be uses to print multiple variables. +# In verbose mode, '<name>=<value>' is printed. +# Trying to print undefined variables results in an error unless '-k' is +# used. In this case an empty value is printed. +# /print-%: FORCE - @:$(foreach v,$(or $(filter $(*),$(.VARIABLES)),$(if $(filter k,$(MAKEFLAGS)),$(*),$(error $(*) undefined))),\ - $(info $(if $(filter 1,$(PTXDIST_VERBOSE)),$(v)=)$(call add_quote,$($(v))))) + @:$(call ptx/print-vars,$(*)) + +# +# As above but tread the variable value as another variable and prints +# the value of this variable. +# Patterns are expanded as above on both levels. +# Printing stops at the first error. +# +/printnext-%: FORCE + @:$(foreach v,$(call ptx/check-expand,$(*)),\ + $(foreach vv,$($(v)),\ + $(call ptx/print-vars,$(vv)))) # for backwards compatibility print-%: /print-% |