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Revision 1.5, Mon Sep 26 02:36:19 2011 UTC (8 years ago) by christos
Branch: MAIN
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Changes since 1.4: +4 -4 lines

mknative for gdb7

$NetBSD: README.mknative,v 1.5 2011/09/26 02:36:19 christos Exp $

This file describes how to use the cross-compiler to generate the
native files for GDB on a target platform.

NOTE:  DO NOT RUN "mknative" BY HAND!  It requires the Makefile in this
directory to set up certain environments first.

Since libc's features change over time, the config.h files can change as a
result; thus the instructions below are the same no matter whether
bootstrapping on a cross or native host.  This is important: even on a
"native" host, you should bootstrap the toolchain by building from an
up-to-date source tree to a $DESTDIR using the exact same instructions.

In these notes, MACHINE is the $MACHINE of the target.  These files can be
cross-generated.  Though a $MACHINE_ARCH all uses the same config files, you
must pick a specific $MACHINE so that building the requisite bits below will
work.

1. Set MKMAINTAINERTOOLS=yes in mk.conf.  (Needed so that src/tools/gettext
   gets built, eliciting proper HAVE_*GETTEXT* defns in config.h files.)

2. Build and install a cross toolchain (via "build.sh -m MACHINE tools").

3. At top level, do "nbmake-MACHINE do-distrib-dirs obj includes".

4. In src/gnu/lib/crtstuff4 do "nbmake-MACHINE depend all install"

5. In src/lib/csu, src/gnu/lib/libgcc4, and src/lib, do
   "nbmake-MACHINE all install".

6. In src/tools/gdb, do "nbmake-MACHINE obj native-gdb".

   This will do a full configury in ${.OBJDIR}/.native that is a "Canadian"
   cross toolchain (--build reflects the host platform, but --host and
   --target are the target).  The result is a tree that would build a
   native-to-NetBSD GDB on a cross host, and mknative pulls glue data
   from this.

   NOTE: this step writes files under src/external/gpl3/gdb/bin/gdb, so you
   need to do it in a writable src tree!

7. Try out a full build using "nbmake-MACHINE" in
   src/external/gpl3/bin/gdb; the result should include a native GDB.

8. If all is well, commit the glue files and directories added to
   src/external/gpl3/gdb/bin/gdb.