Do not create build dires for excluded archs

Allow sources and dbd files specific to EPICS version
Allow headers and templates specific to EPICS version or minor version
Check if 64 bit snc is installed, use 32 bit version if not

App/tools/driver.makefile

 # driver.makefile
 #
-# $Header: /cvs/G/DRV/misc/App/tools/driver.makefile,v 1.92 2014/02/19 10:54:29 zimoch Exp $
+# $Header: /cvs/G/DRV/misc/App/tools/driver.makefile,v 1.93 2014/02/19 12:24:08 zimoch Exp $
 #
 # This generic makefile compiles EPICS code (drivers, records, snl, ...)
 # for all installed EPICS versions in parallel.
@@ -150,6 +150,9 @@ export PRJ
 OS_CLASS_LIST = $(BUILDCLASSES)
 export OS_CLASS_LIST
 
+export ARCH_FILTER
+export EXCLUDE_ARCHS
+
 # Default target is "build" for all versions.
 # Don't install anything (different from default EPICS make rules)
 build::
@@ -195,6 +198,7 @@ debug::
 	@echo "USE_LIBVERSION = ${USE_LIBVERSION}"
 	@echo "LIBVERSION = ${LIBVERSION}"
 	@echo "VERSIONCHECKFILES = ${VERSIONCHECKFILES}"
+	@echo "ARCH_FILTER = ${ARCH_FILTER}"
 
 # Loop over all EPICS versions for second run.
 build install uninstall install-headers install-doc install-templates debug::
@@ -203,7 +207,7 @@ build install uninstall install-headers install-doc install-templates debug::
 
 # Handle cases where user requests 3.13 or 3.14 
 # make <action>.3.13 or make <action>.3.14 instead of make <action> or
-# make 3.13 or make 3.14 instread of make
+# make 3.13 or make 3.14 instead of make
 
 define VERSIONRULES
 $(1):
@@ -298,10 +302,12 @@ ifndef T_A
 AUTOSRCS := $(filter-out ~%,$(wildcard *.c) $(wildcard *.cc) $(wildcard *.cpp) $(wildcard *.st) $(wildcard *.stt) $(wildcard *.gt))
 SRCS = $(if ${SOURCES},$(filter-out -none-,${SOURCES}),${AUTOSRCS})
 SRCS += ${SOURCES_${EPICS_BASETYPE}}
+SRCS += ${SOURCES_${EPICSVERSION}}
 export SRCS
 
 DBDFILES = $(if ${DBDS},$(filter-out -none-,${DBDS}),$(wildcard *Record.dbd) $(strip $(filter-out %Include.dbd dbCommon.dbd %Record.dbd,$(wildcard *.dbd)) ${BPTS}))
 DBDFILES += ${DBDS_${EPICS_BASETYPE}}
+DBDFILES += ${DBDS_${EPICSVERSION}}
 DBDFILES += $(patsubst %.gt,%.dbd,$(notdir $(filter %.gt,${SRCS})))
 ifeq (${EPICS_BASETYPE},3.14)
 DBDFILES += $(patsubst %.st,%_snl.dbd,$(notdir $(filter %.st,${SRCS})))
@@ -321,9 +327,13 @@ BPTS = $(patsubst %.data,%.dbd,$(wildcard bpt*.data))
 export BPTS
 
 HDRS = ${HEADERS} $(addprefix ${COMMON_DIR}/,$(addsuffix Record.h,${RECORDS}))
+HDRS += ${HEADERS_${EPICS_BASETYPE}}
+HDRS += ${HEADERS_${EPICSVERSION}}
 export HDRS
 
 TEMPLS = ${TEMPLATES}
+TEMPLS += ${TEMPLATES_${EPICS_BASETYPE}}
+TEMPLS += ${TEMPLATES_${EPICSVERSION}}
 export TEMPLS
 
 DOCUDIR = .
@@ -696,8 +706,7 @@ endif
 
 # snc location in 3.14
 #-include ${SNCSEQ}/configure/RULES_BUILD # incompatible to 3.15
-SNCPATH=$(firstword $(realpath ${SNCSEQ}/bin/$(EPICS_HOST_ARCH)) $(realpath ${SNCSEQ}/bin/$(EPICS_HOST_ARCH:_64=)))
-SNC=${SNCPATH}/snc
+SNC=${SNCSEQ}/bin/$(EPICS_HOST_ARCH)/snc
 SNC_CFLAGS=-I ${SNCSEQ}/include
 
 endif # 3.14