Re: Makefile rule differences with base 3.14 vs 3.15+ in ADCore build with pvi

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 8/12/22 10:03, Yendell, Gary (DLSLtd, RAL, LSCI) via Tech-talk wrote:
> ...
> %Parameters.template$(DEP): $(TOP)/pvi/%.pvi.producer.yaml
>       @$(RM) $@>       echo "%Parameters.template: $(TOP)/pvi/%.pvi.producer.yaml" > $@
I don't think that replicating the .template dependency is the
right way to go.  The purpose of a $(DEP) file is to capture
indirect dependencies.  eg. if your .yaml file contains
references to other files.

A look at rules for MSI might be informative.

> $ git grep -iB3 MSI3 -- configure/
> configure/CONFIG_DATABASE_MODULE-
> configure/CONFIG_DATABASE_MODULE-# Windows can need these paths to be quoted
> configure/CONFIG_DATABASE_MODULE-MAKEBPT = "$(EPICS_BASE_HOST_BIN)/makeBpt$(HOSTEXE)"
> configure/CONFIG_DATABASE_MODULE:MSI3_15 = "$(EPICS_BASE_HOST_BIN)/msi$(HOSTEXE)"
> --
> configure/RULES.Db-
> configure/RULES.Db-%.db$(DEP): %$(SUBST_SUFFIX)
> configure/RULES.Db-     @$(RM) $@
> configure/RULES.Db:     $(MSI3_15) -D $(DBFLAGS) -o $(COMMONDEP_TARGET) -S$< $(TEMPLATE_FILENAME) > $@
...
> --
> configure/RULES.Db-$(COMMON_DIR)/%.db: %$(SUBST_SUFFIX)
> configure/RULES.Db-     $(ECHO) "Inflating database from $< $(TEMPLATE_FILENAME)"
> configure/RULES.Db-     @$(RM) $(notdir $@)
> configure/RULES.Db:     $(MSI3_15) $(DBFLAGS) -o $(notdir $@) -S$< $(TEMPLATE_FILENAME)
> --
...

Where

> $ git grep '^\s*COMMONDEP_TARGET'
> configure/RULES.Db:COMMONDEP_TARGET = $(COMMON_DIR)/$(basename $@)

An example end result when expanding a evr-pmc-230.substitutions file:

> $ cat mrfioc2/evrMrmApp/Db/O.linux-x86_64/evr-pmc-230.db.d 
> ../O.Common/evr-pmc-230.db: ../mrmevrbase.template \
>  ../../../db/evrbase.db \
>  ../../../mrmShared/Db/databuftx.db \
>  ../../../mrmShared/Db/databuftxCtrl.db \
>  ../mrmevrbufrx.db \
>  ../../../mrmShared/Db/sfp.db \
>  ../../../db/evrmap.db \
>  ../../../db/evrevent.db \
>  ../../../db/evrscale.db \
>  ../mrmevrout.db \
>  ../mrmevroutint.db \
>  ../../../db/evrpulser.db \
>  ../../../db/evrpulsermap.db \
>  ../../../db/evrin.db
Another common thing to do is to emit a dependency on
"../Makefile" to (hopefully) regenerate if the rules
are changed.  (more less guaranteed while you are
trying to get this working)