ld64 with ppc

ld64/.gitignore

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+build
+DerivedData

ld64/compile_stubs

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+#!/bin/csh
+
+# Attempt to find the architecture.
+# First look through the command line args.
+set arch=unknown
+set link_cmd=(`cat link_command`)
+while ( $#link_cmd > 0 )
+	if ( "$link_cmd[1]" == "-arch" ) then
+		set arch=$link_cmd[2]
+	endif
+	shift link_cmd
+end
+
+# look for an explicit arch file
+if ( "$arch" == "unknown" ) then
+	if ( -e arch ) then
+		set arch=`cat arch`
+	endif
+endif
+
+if ( "$arch" == "unknown" ) then
+echo "***** Unable to determine architecture."
+exit 1
+endif 
+
+# Create .dylibs for each file in the dylib_stubs directory.
+if ( -e dylib_stubs ) then
+	set files=`cd dylib_stubs ; echo *`
+	mkdir -p dylibs
+	foreach file ($files)
+		if ( ! -e dylibs/$file ) then
+			clang -arch $arch -c -fno-builtin -o tmp_object.o -x c dylib_stubs/$file
+			ld -arch $arch -dylib -macosx_version_min 10.1 -no_version_load_command -o dylibs/$file tmp_object.o
+		endif
+	end
+endif
+
+# Create .frameworks for each file in the framework_stubs directory.
+if ( -e framework_stubs ) then
+	set files=`cd framework_stubs ; echo *`
+	foreach file ($files)
+		if ( ! -e frameworks/$file.framework ) then
+			clang -arch $arch -c -fno-builtin -o tmp_object.o -x c framework_stubs/$file
+			mkdir -p frameworks/$file.framework
+			ld -arch $arch -dylib -macosx_version_min 10.1 -no_version_load_command -o frameworks/$file.framework/$file tmp_object.o
+		endif
+	end
+endif
+
+# Clean up.
+rm -f tmp_object.o

ld64/doc/man/man1/dyldinfo.1

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+.Dd November 10, 2010
+.Dt dyldinfo 1
+.Os Darwin
+.Sh NAME
+.Nm dyldinfo
+.Nd "Displays information used by dyld in an executable"
+.Sh SYNOPSIS
+.Nm
+.Op Fl arch Ar arch-name 
+.Op Fl dylibs
+.Op Fl rebase
+.Op Fl bind
+.Op Fl weak_bind
+.Op Fl lazy_bind
+.Op Fl export
+.Op Fl opcodes
+.Op Fl function_starts
+.Ar file(s)
+.Sh DESCRIPTION
+Executables built for Mac OS X 10.6 and later have a new format for the
+information in the __LINKEDIT segment.  The dyldinfo tool will display
+that information.   
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl arch Ar arch
+Only display the specified architecture.  Other architectures in a universal image are ignored.
+.It Fl dylibs
+Display the table of dylibs on which this image depends.
+.It Fl rebase
+Display the table of rebasing information.  Rebasing is what dyld does when an image is 
+not loaded at its preferred address.  Typically, this involves updating pointers in the __DATA
+segment which point within the image. 
+.It Fl bind
+Display the table of binding information.  These are the symbolic fix ups that dyld must
+do when an image is loaded.
+.It Fl weak_bind
+Display the table of weak binding information.  Typically, only C++ progams will have any 
+weak binding.  These are symbols which dyld must unique accross all images.
+.It Fl lazy_bind
+Display the table of lazy binding information. These are symbols which dyld delays binding
+until they are first used.  Lazy binding is automatically used for all function calls to
+functions in some external dylib.
+.It Fl export
+Display the table symbols which this image exports.
+.It Fl opcodes
+Display the low level opcodes used to encode all rebase and binding information.
+.It Fl function_starts
+Decodes the list of function start addresses.
+.El
+.Sh SEE ALSO
+.Xr otool 1
+.Xr nm 1