Move Makefile.lib32 to Makefile.libcompat and generalize it.

This is in preparation for LIBSOFT.

This file only supports *1* LIBCOMPAT value currently and must be capitalized.
In Makefile.libcompat given LIBCOMPAT=FOO there can be values set for
LIBFOOCFLAGS, LIBFOOCPUFLAGS, LIBFOOWMAKEENV, LIBFOOWMAKEFLAGS, LIBFOOCPUFLAGS,
and LIBFOODTRACE.  These will have the standard cross-build values appended
onto them.

This could be extended to support multiple libcompat libraries in the future
once there is a need.

Reviewed by:	imp
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D5612

Makefile.libcompat

@@ -0,0 +1,152 @@
+# $FreeBSD$
+
+.if !targets(__<${_this:T}>__)
+__<${_this:T}>__:
+
+# Makefile for the compatibility libraries.
+# - 32-bit compat libraries on PowerPC and AMD64.
+#   could also be for mips, but that doesn't work today.
+
+# -------------------------------------------------------------------
+# 32 bit world
+.if ${TARGET_ARCH} == "amd64"
+.if empty(TARGET_CPUTYPE)
+LIB32CPUFLAGS=	-march=i686 -mmmx -msse -msse2
+.else
+LIB32CPUFLAGS=	-march=${TARGET_CPUTYPE}
+.endif
+LIB32WMAKEENV=	MACHINE=i386 MACHINE_ARCH=i386 \
+		MACHINE_CPU="i686 mmx sse sse2"
+LIB32WMAKEFLAGS=	\
+		AS="${XAS} --32" \
+		LD="${XLD} -m elf_i386_fbsd -Y P,${LIBCOMPATTMP}/usr/lib32" \
+		OBJCOPY="${XOBJCOPY}"
+
+.elif ${TARGET_ARCH} == "powerpc64"
+.if empty(TARGET_CPUTYPE)
+LIB32CPUFLAGS=	-mcpu=powerpc
+.else
+LIB32CPUFLAGS=	-mcpu=${TARGET_CPUTYPE}
+.endif
+LIB32WMAKEENV=	MACHINE=powerpc MACHINE_ARCH=powerpc
+LIB32WMAKEFLAGS=	\
+		LD="${XLD} -m elf32ppc_fbsd" \
+		OBJCOPY="${XOBJCOPY}"
+.endif
+
+
+LIB32CFLAGS=	-m32 -DCOMPAT_32BIT
+LIB32DTRACE=	${DTRACE} -32
+LIB32WMAKEFLAGS+=	-DCOMPAT_32BIT
+
+# -------------------------------------------------------------------
+# Generic code for each type.
+# Set defaults based on type.
+libcompat=	${LIBCOMPAT:tl}
+_LIBCOMPAT_MAKEVARS=	_OBJTREE TMP CFLAGS WMAKEENV WMAKEFLAGS WMAKE
+.for _var in ${_LIBCOMPAT_MAKEVARS}
+.if !empty(LIB${LIBCOMPAT}${_var})
+LIBCOMPAT${_var}?=	${LIB${LIBCOMPAT}${_var}}
+.endif
+.endfor
+
+# Shared flags
+LIBCOMPAT_OBJTREE?=	${OBJTREE}${.CURDIR}/world${libcompat}
+LIBCOMPATTMP?=		${OBJTREE}${.CURDIR}/lib${libcompat}
+
+LIBCOMPATCFLAGS+=	${LIBCOMPATCPUFLAGS} \
+			-isystem ${LIBCOMPATTMP}/usr/include/ \
+			-L${LIBCOMPATTMP}/usr/lib${libcompat} \
+			-B${LIBCOMPATTMP}/usr/lib${libcompat}
+
+# Yes, the flags are redundant.
+LIBCOMPATWMAKEENV+= MAKEOBJDIRPREFIX=${LIBCOMPAT_OBJTREE} \
+		_LDSCRIPTROOT=${LIBCOMPATTMP} \
+		INSTALL="sh ${.CURDIR}/tools/install.sh" \
+		PATH=${TMPPATH} \
+		LIBDIR=/usr/lib${libcompat} \
+		SHLIBDIR=/usr/lib${libcompat} \
+		DTRACE="${LIB$COMPATDTRACE:U${DTRACE}}"
+LIBCOMPATWMAKEFLAGS+= CC="${XCC} ${LIBCOMPATCFLAGS}" \
+		CXX="${XCXX} ${LIBCOMPATCFLAGS}" \
+		DESTDIR=${LIBCOMPATTMP} \
+		-DLIBRARIES_ONLY \
+		-DNO_CPU_CFLAGS \
+		MK_CTF=no \
+		-DNO_LINT \
+		MK_TESTS=no
+LIBCOMPATWMAKE+=	${LIBCOMPATWMAKEENV} ${MAKE} ${LIBCOMPATWMAKEFLAGS} \
+			MK_MAN=no MK_HTML=no
+LIBCOMPATIMAKE+=	${LIBCOMPATWMAKE:NINSTALL=*:NDESTDIR=*:N_LDSCRIPTROOT=*} \
+			MK_TOOLCHAIN=no ${IMAKE_INSTALL}
+
+.if ${XCC:N${CCACHE_BIN}:M/*}
+LIBCOMPATCFLAGS+=	--sysroot=${WORLDTMP}
+.endif
+
+_LC_LIBDIRS.yes=		lib gnu/lib
+_LC_LIBDIRS.${MK_CDDL:tl}=	cddl/lib
+_LC_LIBDIRS.${MK_CRYPT:tl}=	secure/lib
+_LC_LIBDIRS.${MK_KERBEROS:tl}=	kerberos5/lib
+
+# Shared logic
+build${libcompat}: .PHONY
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo ">>> stage 5.1: building lib${libcompat} shim libraries"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${LIBCOMPATTMP}/usr/include
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.usr.dist \
+	    -p ${LIBCOMPATTMP}/usr >/dev/null
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.include.dist \
+	    -p ${LIBCOMPATTMP}/usr/include >/dev/null
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.lib${libcompat}.dist \
+	    -p ${LIBCOMPATTMP}/usr >/dev/null
+.if ${MK_DEBUG_FILES} != "no"
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.debug.dist \
+	    -p ${LIBCOMPATTMP}/usr/lib >/dev/null
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.lib${libcompat}.dist \
+	    -p ${LIBCOMPATTMP}/usr/lib/debug/usr >/dev/null
+.endif
+	mkdir -p ${WORLDTMP}
+	ln -sf ${.CURDIR}/sys ${WORLDTMP}
+.for _t in obj includes
+	${_+_}cd ${.CURDIR}/include; ${LIBCOMPATWMAKE} DIRPRFX=include/ ${_t}
+.for _dir in ${_LC_LIBDIRS.yes}
+	${_+_}cd ${.CURDIR}/${_dir}; ${LIBCOMPATWMAKE} DIRPRFX=${_dir}/ ${_t}
+.endfor
+.endfor
+.for _dir in usr.bin/lex/lib
+	${_+_}cd ${.CURDIR}/${_dir}; ${LIBCOMPATWMAKE} DIRPRFX=${_dir}/ obj
+.endfor
+.for _dir in lib/ncurses/ncurses lib/ncurses/ncursesw lib/libmagic
+	${_+_}cd ${.CURDIR}/${_dir}; \
+	    WORLDTMP=${WORLDTMP} \
+	    MAKEFLAGS="-m ${.CURDIR}/tools/build/mk ${.MAKEFLAGS}" \
+	    MAKEOBJDIRPREFIX=${LIBCOMPAT_OBJTREE} ${MAKE} SSP_CFLAGS= DESTDIR= \
+	    DIRPRFX=${_dir}/ -DNO_LINT -DNO_CPU_CFLAGS MK_WARNS=no MK_CTF=no \
+	    build-tools
+.endfor
+	${_+_}cd ${.CURDIR}; \
+	    ${LIBCOMPATWMAKE} -f Makefile.inc1 -DNO_FSCHG libraries
+.if ${libcompat} == "32"
+.for _t in obj depend all
+	${_+_}cd ${.CURDIR}/libexec/rtld-elf; PROG=ld-elf32.so.1 ${LIBCOMPATWMAKE} \
+	    -DNO_FSCHG DIRPRFX=libexec/rtld-elf/ ${_t}
+	${_+_}cd ${.CURDIR}/usr.bin/ldd; PROG=ldd32 ${LIBCOMPATWMAKE} \
+	    DIRPRFX=usr.bin/ldd ${_t}
+.endfor
+.endif
+
+distribute${libcompat} install${libcompat}: .PHONY
+.for _dir in ${_LC_LIBDIRS.yes}
+	${_+_}cd ${.CURDIR}/${_dir}; ${LIBCOMPATIMAKE} ${.TARGET:S/${libcompat}$//}
+.endfor
+.if ${libcompat} == "32"
+	${_+_}cd ${.CURDIR}/libexec/rtld-elf; \
+	    PROG=ld-elf32.so.1 ${LIBCOMPATIMAKE} ${.TARGET:S/32$//}
+	${_+_}cd ${.CURDIR}/usr.bin/ldd; PROG=ldd32 ${LIBCOMPATIMAKE} \
+	    ${.TARGET:S/32$//}
+.endif
+
+.endif