* distro/packages/base.scm (%bootstrap-guile): Build from a tarball
  containing a pre-built Guile.

* distro.scm (%bootstrap-binaries-directory): New variable.
  (search-bootstrap-binary): New procedure.

* Makefile.am (bootstrapdir, bootstrap_x86_64_linuxdir,
  dist_bootstrap_x86_64_linux_DATA, DISTCLEANFILES, DOWNLOAD_FILE): New
  variables.
  (distro/packages/bootstrap/x86_64-linux/guile-bootstrap-2.0.6.tar.xz):
  New rule.
  (EXTRA_DIST): Add `build-aux/download.scm'.
  (.scm.go): Define the `DISTRO_BOOTSTRAP_DIRECTORY' and
  `DISTRO_INSTALLED_BOOTSTRAP_DIRECTORY' environment variables.

* pre-inst-env.in: Define `DISTRO_BOOTSTRAP_DIRECTORY'.

* build-aux/download.scm: New file.
* distro/packages/bootstrap/x86_64-linux/{bash, mkdir, tar, xz}: New
  files.

* distro/packages/base.scm (%guile-static-stripped): New variable.

* distro/patches/guile-default-utf8.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

* distro/packages/base.scm (%guile-static): Use it.
  (%guile-static-stripped): Add call to `remove-store-references'.

* distro/patches/guile-relocatable.patch: Change to use /proc/self/exe
  instead of PROGRAM_INVOCATION_NAME.  Useful because Nix itself passes
  just the basename of builders that it executes.

* Makefile.am (TESTS_ENVIRONMENT): Remove.
  (LOG_COMPILER): Use `pre-inst-env'.

* release.nix (tarball)[buildNativeInputs]: Add `texinfo'.

* guix/build/utils.scm (fold-port-matches, remove-store-references): New
  procedures.

* tests/build-utils.scm ("fold-port-matches", "fold-port-matches,
  trickier", "fold-port-matches, with unmatched chars"): New tests.

* guix/build/utils.scm (with-atomic-file-replacement): New procedure.
  (substitute): Use it.

* distro/packages/base.scm (%guile-static, %guile-static-stripped): New
  variables.

* distro/patches/guile-relocatable.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

* guix/ftp-client.scm (ftp-open): Upon connection failure, try the other
  addresses returned by `getaddrinfo'.

* doc/guix.texi: New file.
* doc/fdl-1.3.texi: New file, copied from Gnulib.

* Makefile.am (info_TEXINFOS): New variable.
  (EXTRA_DIST): Add `doc/fdl-1.3.texi'.

* distro/packages/base.scm (default-keyword-arguments): New procedure.

* distro/packages/base.scm (static-package): New procedure.
  (%bash-static, %static-inputs, %static-binaries): New variables.

* guix.scm (%public-modules): Remove `snix', since that modules doesn't
  exist yet.

* guix/packages.scm (%derivation-cache): Pass an initial size of 100.
  (cache): Use `hashq-set!', and use a SYSTEM/DRV pair as the value.
  (cached-derivation): Update accordingly.

* guix/packages.scm (package-derivation): Move `cache' call before the
  traversal of PACKAGE's inputs.

* guix/derivations.scm (read-derivation): Set DRV-PORT's encoding to
  UTF-8.

* guix.scm (%public-modules): Update list of current second-level
  modules.

* tests/builders.scm (%bootstrap-inputs, %bootstrap-guile): New
  variables.
  ("gnu-build"): Use them, by setting `#:implicit-inputs? #f' and `#:guile'.

* tests/packages.scm (%bootstrap-inputs, %bootstrap-guile): New
  variables.
  ("trivial"): Pass `#:guile %bootstrap-guile'.
  ("GNU Hello"): Use `package-with-explicit-inputs' to use
  %BOOTSTRAP-GUILE and %BOOTSTRAP-INPUTS.

* guix/build-system/gnu.scm (gnu-build)[guile-for-build]: Check whether
  GUILE matches string? before checking whether it matches
  derivation-path?.
* guix/build-system/trivial.scm (trivial-build)[guile-for-build]:
  Likewise.

* distro/packages/base.scm (%bootstrap-guile): New variable.
  (gnu-make-boot0, diffutils-boot0, findutils-boot0, binutils-boot0,
  gcc-boot0, linux-headers-boot0, glibc-final, gcc-boot0-wrapped,
  gcc-final, ld-wrapper-boot3, bash-final, guile-final): Add
  `#:guile %bootstrap-guile' to the builder's arguments.

* guix/build-system/gnu.scm (package-with-explicit-inputs): New `guile'
  keyword parameter.  Add it to P's arguments, and pass it in recursive
  calls.
  (gnu-build): New `guile' keyword parameter; new `guile-for-build'
  variable.  Pass it as the `#:guile-for-build' parameter of
  `build-expression->derivation'.

* guix/build-system/trivial.scm (trivial-build): Likewise.

* guix/build/gnu-build-system.scm (%parallel-job-count): New variable.
  (build, check): Use it instead of $NIX_BUILD_CORES.

* guix-build.in (guix-build): Default to 0 for the #:build-cores option.

* README (Hacking): Mention `--with-nixpkgs'.  List the autotools and
  Gettext, as suggested by Nikita Karetnikov <nikita.karetnikov@gmail.com>.

* distro.scm (package-files): Add missing newline in warning message.

* pre-inst-env.in: New file.
* configure.ac: Add it to `AC_CONFIG_FILES' and `AC_CONFIG_COMMANDS'.

* po/POTFILES.in: Update.

* distro/packages/base.scm (libgc): New variable.
  (guile-2.0): Use it.

* distro/packages/base.scm (pkg-config): New variable.
  (guile-2.0): Use it.
* distro/packages/guile.scm (guile-reader): Likewise.

* distro.scm (package-files): Adjust PREFIX-LEN to use the top-level
  directory, not %DISTRO-MODULE-DIRECTORY.
* distro/packages/base.scm (guile-reader, guile-reader/guile-1.8,
  guile-reader/guile-2.0, lout, recutils): Move to...
* distro/packages/guile.scm, distro/packages/typesetting.scm,
  distro/packages/databases.scm: ... here.  New files.
* Makefile.am (MODULES): Add them.
  (EXTRA_DIST): Add `.dir-locals.el'.

* .dir-locals.el: New file, with settings formerly in `base.scm'.

* distro/base.scm, distro/ld-wrapper.scm: Move to `distro/packages'.
  Adjust LD-WRAPPER-BOOT3 input file name accordingly.
* Makefile.am (MODULES): Adjust accordingly.
* distro.scm (%distro-module-directory): Change to "/distro/packages".
* guix/build-system/gnu.scm (standard-inputs): Change module name
  to (distro packages base).
* tests/packages.scm (test-packages): Likewise.

* distro/base.scm (gcc-4.7): Upgrade to 4.7.2.

* distro/ld-wrapper.scm: New file.
* Makefile.am (MODULES): Add it.

* distro/base.scm (ld-wrapper-boot3): New variable.
  (%boot3-inputs): Add LD-WRAPPER-BOOT3.
  (bash-final, guile-final, ld-wrapper): New final.
  (%final-inputs): Use BASH-FINAL; add LD-WRAPPER.
  (gcc-4.7): Remove the `-rpath' trick from the `lib' spec string.

* distro/base.scm (gcc-4.7): Patch `LIB_SPEC' to add `-rpath' for each
  `-L'.  Spec string suggested by Marc Glisse <marc.glisse@inria.fr>.
  (libtool): Add `libtool-skip-tests.patch'.

* distro/patches/libtool-skip-tests.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

* guix/ftp-client.scm, guix/ftp.scm, guix/build/ftp.scm: New files.
* Makefile.am (MODULES): Add them.

* distro/base.scm (libffi): Use `ftp-fetch'.

* distro/base.scm (linux-headers-boot0): Use PERL with %BOOT0-INPUTS
  instead of calling out to `nixpkgs-derivation*'.

* distro/base.scm (gcc-4.7): Remove unnecessary "libc" input.
  Add `-rpath LIBC/lib' to `LIB_SPEC'.

* distro/base.scm (perl): New variable.
* distro/patches/perl-no-sys-dirs.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

This allows the final toolchain to be completely independent of
%BOOTSTRAP-INPUTS.

* distro/base.scm (glibc-dynamic-linker): New procedure.
  (gcc-4.7): Remove #:path-exclusions argument.  Check whether LIBC is
  #f before using it.
  (glibc): Remove "libc_cv_as_needed" hack.  Patch `Makeconfig' to
  remove `-lgcc_s'.
  (nix-system->gnu-triplet, boot-triplet): New variables.
  (binutils-boot0): Turn into a cross-Binutils targeting (boot-triplet
  SYSTEM).
  (gcc-boot0): Likewise.  Add configure options to make a smaller
  build.  Remove "binutils-source" from the input, and use
  BINUTILS-BOOT0 instead.
  (glibc-final): Cross-build using GCC-BOOT0 and BINUTILS-BOOT0.
  (gcc-boot0-wrapped): New variable.
  (%boot2-inputs): Use it.
  (m4-boot2, gmp-boot2, mpfr-boot2, mpc-boot2): Remove.
  (binutils-final): New variable.
  (gcc-final): Turn into a joint build with GMP/MPFR/MPC.  Use
  BINUTILS-FINAL.
  (%boot3-inputs): Adjust accordingly.
  (%boot4-inputs): Remove.
  (%final-inputs): Use %BOOT3-INPUTS.

* guix/build-system/trivial.scm: New file.
* Makefile.am (MODULES): Add it.
* tests/packages.scm ("trivial"): New test.

* guix/packages.scm (package-derivation): Allow SOURCE to be #f.