#
# $Revision: 1.8 $
#
# Commondefs for building multiple versions of commands with different
# compiler flags.
#
# One can either select from one of the 'popular' versions, as defined in
#	commondefs, or invent a new version. If one picks from the list
#	in commondefs, then all the compiler flags will be set automatically
#	otherwise one must use VERSION_* flags to customize the compile.
#	commondefs defines generic versions for each ABI -
#		32 - for the ucode/MIPS ABI
#		64 - for 64 bit
#	       N32 - for the new 32 bit ABI
#	These are independent of ISA, which can be decided on a release by
#	release basis. It is recommended that 1 or all of these be chosen
#	rather than any of the others in commondefs or a private version.
#
# Before including cmdcommondefs the Makefile must define:
#
#  BASEVERSION - a string identifying the build to take place in the current
#		 directory, such as '32bit'.
#  ALTVERSIONS - a list of strings identifying other alternate build areas.
#
# Every version requires a `versiondefs' file that customize that make for that
# version.  The BASEVERSION versiondefs file is simply 'versiondefs' in the
# current directory; other alternate versiondefs files are prepended with the
# version name.  For example, if the ALTVERSIONS=64bit, a `64bitversiondefs'
# file is required.
# Note that the values for BASEVERSION/ALTVERSIONS affect ONLY the makefile
# targets/operations - they have nothing to do with options or objects produced.
#
# Each versiondefs file MUST define:
#
# VERSION  - this must match either BASEVERSION or something in the ALTVERSIONS
#	     list.
#
# Each versiondefs file will probably want to define:
#
# OBJECT_STYLE - which ABI/ISA should this version be built as.
#	     If left blank, than either the one specified in the top makefile
#	     or the default specified in releasedefs will be used.
#
# COMMANDS - the list of targets to build - if the list of objects to make
#	     is the same for all versions, COMMANDS may be set once in the
#	     top makefile. It must be set EITHER in a versiondefs file OR
#	     in the top makefile.
#
# Options common to all versions should be specified in the top Makefile
#	by setting LCOPTS, LCDEFS, etc..
#	Additional options for a particular verion can be added using:
#	LCOPTS+=-foo
#	In the appropriate versiondefs file
#	Note that one should either:
#	 a) include cmdcommondefs AFTER setting L* OR
#	 b) use the += construct in the top makefile also
#
# N.B. - a) assumes that the default rule in the makefile contains $(TARGETS)
#	 b) assumes that makefile doesn't redefine TARGETS
#

CMDCOMMONRULES=$(ROOT)/usr/include/make/cmdcommonrules

#
# include releasedefs - it defines compiler versions and default build modes
# versiondefs needs it. It will also be included later from commondefs
#
include $(ROOT)/usr/include/make/releasedefs

#
# include version specific definitions
# This most likely sets OBJECT_STYLE which commondefs needs
#
#include <versiondefs>

#
# include normal commondefs
#
include $(ROOT)/usr/include/make/commondefs

COMMONPREF=cmd

#
# NOTE - the quotes are important here to force a string comaprison - otherwise
#  #if the variable value began with a number, it might match (e.g. 32bit and
#  32elf match)
#
#if $(VERSION) == "$(BASEVERSION)"

TARGETS = $(COMMANDS) $(ALTVERSIONS)

SUBDIRS=$(ALTVERSIONS)

#if defined(ALTVERSIONS)
ALTVERSIONS_MAKERULE=$(SUBDIRS_MAKERULE)
#else
ALTVERSIONS_MAKERULE=
#endif

#
# sigh - we really can't afford to be doing the ALTVERSIONS at the same
# time as the top level makefile - but this means that the top level doesn't
# get run in parallel. There are some solutions (using .ORDER) if we can
# redefine the default rule, but that doesn't seem like a good idea.
# So we offer a solution - if the makefile doesn't mind having a new 'default'
# target, they can get parallelism
#
#if defined(WANTPARALLEL)
cmddefault!cmdbase $(ALTVERSIONS)
#else
.NOTPARALLEL:
#endif

#else

TARGETS=$(COMMANDS)
ALTVERSIONS_MAKERULE=

#endif

#
# The ALTVERSIONS dirs are created by tlinking. We exclude the a.outs in
# the base version, all intermediate objects, the depend file and versiondefs.
# We also exclude ALTVERSIONS itself to prevent infinite recursion by tlink.
# 
TLINKXARGS = $(COMMANDS:S/^/-x'^/g:S/$/\$'/g) -x '^.*\.[oai]$$' \
	     -x '^.*\.so$$' \
	     -x '$(MKDEPFILE)' -x 'versiondefs' \
	     -x 'y.output' -x 'y.tab.[ch]' \
	     $(ALTVERSIONS:S/^/-x'^/g:S/$/\$'/g)

#
# IDB tags for 32 and 64 bit versions
#
IDB_TAG32=-idb "mach(MODE=32bit)"
IDB_TAG64=-idb "mach(MODE=64bit)"