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, 9 insertions, 1 deletions

diff --git a/mk/wrapper/arg-source b/mk/wrapper/arg-source
index bf4ce639fcb..00d840bb304 100644
--- a/mk/wrapper/arg-source
+++ b/mk/wrapper/arg-source
@@ -1,4 +1,4 @@
-# $NetBSD: arg-source,v 1.12 2007/02/23 00:31:29 rillig Exp $
+# $NetBSD: arg-source,v 1.13 2007/08/02 18:19:32 joerg Exp $
 #
 # Copyright (c) 2004 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -160,6 +160,14 @@ while $test $# -gt 0; do
 		esac
 		;;
 	##############################################################
+	# Remember whether running the linker is desired.
+	##############################################################
+	-c|-S|-E)
+		dont_link=yes
+		append_queue argbuf "$arg"
+		$debug_log $wrapperlog "    (arg-source) push: $arg"
+		;;
+	##############################################################
 	# For everything else, just queue it up.
 	##############################################################
 	*)