Add core of the infrastructure support for cross-compilation.

- USE_CROSS_COMPILATION activates it, CROSS_DESTDIR specifies root of
  the target filesystem
- derive _CROSS_DESTDIR from CROSS_DESTDIR or MAKEOBJDIR
- buildlink3.mk prefixes the files to symlink with _CROSS_DESTDIR
- compiler/gcc.mk knows about the target prefix (e.g. i386--netbsdelf)
- PKG_DBDIR is prefixed with _CROSS_DESTDIR
- package-install and bin-install are not called with su
- install and strip are redirected to the tool version
- links for the target specific ar, as, ld, nm, objdump, ranlib and
  strip are added
- compiler wrapper detect if linking is requested or not
- special command sinks for CPP and CC/CXX add the cross-compile magic:
  - modify include dirs to get the target /usr/include
  - modify linker dirs and runpath to use target /usr/lib at link time,
    but keep correct rpath entries

Supported-by: Google SoC 2007
Basic tests by he@ on Sparc. Review from jlam@.

1 files changed, 22 insertions, 1 deletions

diff --git a/mk/wrapper/bsd.wrapper.mk b/mk/wrapper/bsd.wrapper.mk
index 9e08e9e777f..0bf1bcd5df1 100644
--- a/mk/wrapper/bsd.wrapper.mk
+++ b/mk/wrapper/bsd.wrapper.mk
@@ -1,4 +1,4 @@
-# $NetBSD: bsd.wrapper.mk,v 1.70 2007/06/18 07:33:34 rillig Exp $
+# $NetBSD: bsd.wrapper.mk,v 1.71 2007/08/02 18:19:32 joerg Exp $
 #
 # Copyright (c) 2005 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -349,6 +349,12 @@ _WRAP_CACHE_BODY.CXX=	${_WRAP_CACHE_BODY.CC}
 _WRAP_TRANSFORM.CXX=	${_WRAP_TRANSFORM.CC}
 .endif
 
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+_WRAP_CMD_SINK.CC=	${WRAPPER_TMPDIR}/cmd-sink-cross-gcc
+_WRAP_CMD_SINK.CPP=	${WRAPPER_TMPDIR}/cmd-sink-cross-cpp
+_WRAP_CMD_SINK.CXX=	${_WRAP_CMD_SINK.CC}
+.endif
+
 .if ${OPSYS} == "SunOS" && !empty(PKGSRC_COMPILER:Mgcc)
 _WRAP_CMD_SINK.IMAKE=	${WRAPPER_TMPDIR}/cmd-sink-solaris-imake
 _WRAP_CACHE_BODY.IMAKE=	${WRAPPER_TMPDIR}/cache-body-solaris-imake
@@ -512,6 +518,21 @@ ${WRAPPER_TMPDIR}/${w}: ${WRAPPER_SRCDIR}/${w}
 	${RUN} ${CAT} ${.ALLSRC} | ${_WRAP_SH_CRUNCH_FILTER} > ${.TARGET}
 .endfor
 
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+_WRAP_CROSS_GCC_FILTER+= ${SED}						\
+	-e "s|@CROSS_DESTDIR@|${_CROSS_DESTDIR:Q}|g"			\
+	-e "s|@PREFIX@|${PREFIX:Q}|g"
+${WRAPPER_TMPDIR}/cmd-sink-cross-gcc: ${WRAPPER_SRCDIR}/cmd-sink-cross-gcc
+	${RUN} ${MKDIR} ${.TARGET:H}
+	${RUN} ${CAT} ${.ALLSRC} | ${_WRAP_CROSS_GCC_FILTER} |		\
+	${_WRAP_SH_CRUNCH_FILTER} > ${.TARGET}
+
+${WRAPPER_TMPDIR}/cmd-sink-cross-cpp: ${WRAPPER_SRCDIR}/cmd-sink-cross-cpp
+	${RUN} ${MKDIR} ${.TARGET:H}
+	${RUN} ${CAT} ${.ALLSRC} | ${_WRAP_CROSS_GCC_FILTER} |		\
+	${_WRAP_SH_CRUNCH_FILTER} > ${.TARGET}
+.endif
+
 .if !target(${_WRAP_GEN_REORDER})
 ${_WRAP_GEN_REORDER}: 							\
 		${_WRAP_SHELL_LIB}					\