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<== Date ==> <== Thread ==>

Subject: Proposal for an addition to configure/tools/convertRelease.pl
From: Benjamin Franksen <benjamin.franksen@bessy.de>
To: core-talk@aps.anl.gov
Date: Mon, 29 Jan 2007 13:51:45 +0100
With the following addition to convertRelease.pl, an additional variable 
RELEASE_DBFLAGS will be generated:

# diff convertRelease.orig.pl convertRelease.pl
216a217,221
>     foreach $app (@includes) {
>       $path = $macros{$app};
>       next unless (-d "$path/db");
>       print OUT "RELEASE_DBFLAGS += -I\$(strip \$($app))/db\n";
>     }

This variable can then be added to DBFLAGS (so that e.g. MSI gets the 
correct search path, including the db subdirs of support modules) and 
also to generate the environment needed for vdct's flatdb tool. Flatdb 
needs EPICS_DB_INCLUDE_PATH to be set to a search path for vdb template 
files (it has no command line argument to extend the search path).

Thus, currently we have the following additional rules in our 
application level configure/RULES file:

vpath %.vdb $(RELEASE_DBFLAGS:-I%=%)
vpath %.template $(RELEASE_DBFLAGS:-I%=%)

DBFLAGS += $(RELEASE_DBFLAGS)

FLATDB_ENV = EPICS_DB_INCLUDE_PATH=`echo "$(DBFLAGS:-I%=%)" | tr ' ' 
':'`

define FLATDB_COMMANDS
	@echo Flattening $< to $(COMMON_DIR)/$@
	@$(RM) $@
	# too bad flatdb doesn't return a usable exit code
	-$(FLATDB_ENV) $(FLATDB) $(FLATDB_FLAGS) -d $1 $< $(COMMON_DIR)/$@ $2
endef

ifdef DBDNAME # if a common DBDNAME is defined, use it for flatdb
%.template: %.vdb $(COMMON_DIR)/$(DBDNAME)
	$(call FLATDB_COMMANDS,$(COMMON_DIR)/$(DBDNAME),| grep -vi warning)
%.db$(RAW): %.vdb $(COMMON_DIR)/$(DBDNAME)
	$(call FLATDB_COMMANDS,$(COMMON_DIR)/$(DBDNAME),)
else # no common dbd file, use target specific one
%.template: %.vdb $(COMMON_DIR)/%.dbd
	$(call FLATDB_COMMANDS,$(COMMON_DIR)/$*.dbd,| grep -vi warning)
%.db$(RAW): %.vdb $(COMMON_DIR)/%.dbd
	$(call FLATDB_COMMANDS,$(COMMON_DIR)/$*.dbd,)
endif

Note: We generate .template from .vdb for expansion by .substitutions 
files. Alternatively, final .db files can be generated via vdct's own 
'substitution' facility (i.e. macros/ports).

(It may be useful to include flatdb rules into base, but I am not 
proposing this at this moment. This message is about creating the 
RELEASE_DBFLAGS variable via convertRelease.pl.)

Cheers
Ben
--
"Programming = Mathematics + Murphy's Law" (Dijkstra in EWD1008)

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