2004-08-04 Roland McGrath <roland@frob.com>

New directory implementing glibc add-on infrastructure for
	ports maintained separate from the core glibc source tree.
	* README, configure.in, Makeconfig, Banner, ChangeLog: New files.
	* configure: New generated file.

Banner

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+Support for some architectures added on, not maintained in glibc core.

ChangeLog

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+2004-08-04  Roland McGrath  <roland@frob.com>
+
+	New directory implementing glibc add-on infrastructure for
+	ports maintained separate from the core glibc source tree.
+	* README, configure.in, Makeconfig, Banner, ChangeLog: New files.
+	* configure: New generated file.

Makeconfig

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+# Makeconfig fragment for glibc ports add-on.
+
+# These rules make sure that sysdeps/CPU/preconfigure changes are noticed.
+# preconfigure fragments can be written by hand, or they can be generated
+# from preconfigure.in by autoconf like sysdeps/.../configure.in files.
+
+# Figure out the name of this add-on.  The ports add-on infrastructure
+# scripts can be copied into separate add-on packages by any name.
+ports-sysdeps = $(..)$(Makeconfig-add-on)/sysdeps
+
+$(common-objpfx)config.status: $(wildcard $(ports-sysdeps)/*/preconfigure)
+
+ifneq ($(AUTOCONF),no)
+
+ifeq ($(with-cvs),yes)
+define autoconf-it-cvs
+test ! -d CVS || cvs $(CVSOPTS) commit -m'Regenerated: autoconf $(ACFLAGS) $<' $@
+endef
+else
+autoconf-it-cvs =
+endif
+
+define autoconf-it
+@-rm -f $@.new
+$(AUTOCONF) $(ACFLAGS) $< > $@.new
+chmod a-w,a+x $@.new
+mv -f $@.new $@
+$(autoconf-it-cvs)
+endef
+
+$(..)ports/sysdeps/%/preconfigure: $(..)ports/sysdeps/%/preconfigure.in \
+				   aclocal.m4
+	$(autoconf-it)
+
+endif # $(AUTOCONF) = no

README

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+This directory is an add-on for the GNU C Library (glibc).
+It provides additional ports to machines and/or operating systems that are
+not maintained in the official glibc source tree.
+
+The scripts in the top level of this directory provide the infrastructure
+necessary for a glibc add-on.  You can make a new add-on containing one or
+more ports by copying configure, configure.in, and Makeconfig into your own
+add-on directory, which you can give any name (it doesn't have to be
+`ports').  You may want to include a README and Banner of your own talking
+about your port's code in particular, rather than the generic ones here.
+
+The real source code for any ports is found in the sysdeps/ subdirectories.
+These should be exactly what would go into the main libc source tree if you
+were to incorporate it directly.  The only exceptions are the files
+sysdeps/*/preconfigure and sysdeps/*/preconfigure.in; these are fragments
+used by this add-on's configure fragment.  The purpose of these is to set
+$base_machine et al when the main libc configure's defaults are not right
+for some machine.  Everything else can and should be done from a normal
+sysdeps/.../configure fragment that is used only when the configuration
+selects that sysdeps subdirectory.  Each port that requires some special
+treatment before the sysdeps directory list is calculated, should add a
+sysdeps/CPU/preconfigure file; this can either be written by hand or
+generated by Autoconf from sysdeps/CPU/preconfigure.in, and follow the
+rules for glibc add-on configure fragments.  No preconfigure file should do
+anything on an unrelated configuration, so that disparate ports can be put
+into a single add-on without interfering with each other.
+
+Like all glibc add-ons, the only way to use this is to place this directory
+(just a symlink won't do) inside the top-level glibc source directory.
+Then include the name of this directory (e.g. `ports') when you specify
+`--enable-add-ons=...' to glibc's configure (or use just --enable-add-ons
+to have it try every add-on directory sitting in your source tree).
+
+If you find problems with the top-level scripts in this add-on, please go
+to http://sources.redhat.com/bugzilla/ and file a report for the glibc
+under the "admin" component.
+
+
+$Id$

configure

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+# This file is generated from configure.in by Autoconf.  DO NOT EDIT!
+
+# The configure fragment in this file provides infrastructure for a glibc
+# add-on containing one or more glibc ports.  Only these few script files
+# need exist in the top-level source directory of the add-on.  The ports
+# themselves are contained entirely within their new sysdeps/ directories.
+# This makes it easy to take these few top-level files plus a new port's
+# additions to the sysdeps tree, and package a small add-on for that port.
+# The same infrastructure scripts work for any number of such glibc ports
+# collected together into a single shared add-on package.
+
+cpu_frags=`(cd $srcdir/$libc_add_on; echo sysdeps/*/preconfigure)`
+for frag in $cpu_frags; do
+  echo "$as_me:$LINENO: result: ports add-on running preconfigure fragment $frag" >&5
+echo "${ECHO_T}ports add-on running preconfigure fragment $frag" >&6
+  . $srcdir/$libc_add_on/$frag
+done

configure.in

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+dnl glibc add-on configure.in fragment for a ports add-on.
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+
+# The configure fragment in this file provides infrastructure for a glibc
+# add-on containing one or more glibc ports.  Only these few script files
+# need exist in the top-level source directory of the add-on.  The ports
+# themselves are contained entirely within their new sysdeps/ directories.
+# This makes it easy to take these few top-level files plus a new port's
+# additions to the sysdeps tree, and package a small add-on for that port.
+# The same infrastructure scripts work for any number of such glibc ports
+# collected together into a single shared add-on package.
+
+cpu_frags=`(cd $srcdir/$libc_add_on; echo sysdeps/*/preconfigure)`
+for frag in $cpu_frags; do
+  AC_MSG_RESULT(ports add-on running preconfigure fragment $frag)
+  . $srcdir/$libc_add_on/$frag
+done