gnu: gccgo: Suppress the separate "lib" output.

Fixes <http://debbugs.gnu.org/18101>.

* gnu/packages/gcc.scm (custom-gcc): Add 'separate-lib-output?'
  keyword argument.
  (gccgo-4.8): Pass #:separate-lib-output? #f to 'custom-gcc'.

gnu: gcc: Update to 4.9.1.

* gnu/packages/gcc.scm (gcc-4.9): Update to 4.9.1.

Merge branch 'core-updates'

gnu: gcc: Really avoid 'install-strip' when cross-compiling.

This is a followup to 6b9229c.

* gnu/packages/gcc.scm (gcc-4.7): Turn 'install-target' into a thunk,
  so (%current-target-system) is current.

gnu: gcc-4.7: Upgrade to 4.7.4.

* gnu/packages/gcc.scm (gcc-4.7): Upgrade to 4.7.4.

gnu: gcc: Don't use the 'install-strip' target when cross-compiling.

* gnu/packages/gcc.scm (gcc-4.7): Add 'install-target' variable.  Use
  it in the 'install' phase.

gnu: gcc: Fix cross-compilation of gcc (Canadian cross).

* gnu/packages/gcc.scm (gcc-4.7)[arguments] <#:make-flags>:
  When (%current-target-system) is true, pass the empty list or
  '("CFLAGS=-g0 -O2").

gnu: gcc: Add a "lib" output.

* gnu/packages/gcc.scm (gcc-4.7)[configure-flags]: Add
  --with-gxx-include-dir.
  [outputs]: New field.
  [arguments] <phases>: Adjust to use the "lib" output.  Add
  'substitute*' calls for "libstdc++-v3/python/Makefile.in" and
  "gcc/config.in".
* gnu/packages/base.scm (gcc-boot0) <symlink-libgcc_eh>: Use the "lib"
  output.
  (cross-gcc-wrapper): Add 'outputs' field.
  (glibc-final)[arguments]: Adjust #:allowed-references to list
  '(GCC-BOOT0 "lib").
  (libstdc++): Add 'outputs' field.
  (gcc-final)[arguments]: Add "lib" to #:allowed-references.
* gnu/packages/make-bootstrap.scm (%gcc-static): Add 'outputs' field.

gnu: gcc-4.8: Upgrade to 4.8.3.

* gnu/packages/gcc.scm (gcc-4.8): Upgrade to 4.8.3.

Merge branch 'master' into core-updates

gnu: Add GCC 4.9.0.

* gnu/packages/gcc.scm (gcc-4.9): New variable.
* gnu/packages/base.scm (gcc-toolchain-4.9): New variable.

Merge branch 'master' into core-updates

More /gnu/store replacements.

* gnu/packages/gcc.scm (gcc-4.7): Change /nix/store in comment.
* gnu/system/vm.scm (operating-system-default-contents):
  Use (%store-prefix) instead of "/nix/store".
* guix/derivations.scm (derivation-path->output-path,
  derivation-path->output-paths): Change to /gnu/store in docstring.

gnu: Move libelf and patchelf to (gnu packages elf).

* gnu/packages/patchelf.scm (patchelf): Move to...
* gnu/packages/elf.scm (patchelf): ... here.
* gnu/packages/patchelf.scm: Remove.
* gnu-system.am (GNU_SYSTEM_MODULES): Adjust accordingly.
* gnu/packages/gcc.scm (libelf): Move to...
* gnu/packages/elf.scm (libelf): ... here.
* gnu/packages/cdrom.scm, gnu/packages/icu4c.scm,
  gnu/packages/samba.scm, gnu/packages/scheme.scm, gnu/packages/ssh.scm:
  Adjust references to (gnu packages patchelf).

gnu: Synchronize descriptions with 'gnumaint'.

Merge branch 'core-updates'

Conflicts:
	gnu/packages/gnunet.scm

gnu: gcc: Really always link against libgcc_s.so.

* gnu/packages/gcc.scm (gcc-4.7): Add snippet to add -lgcc_s to the
  "lib" spec.  Remove --as-needed trick from 65d3b7c: it had no effect
  in cases where we have !static-libgcc && !shared-libgcc.

gnu: gcc: Always link against libgcc_s.so.

* gnu/packages/gcc.scm (gcc-4.7)[pre-configure]: Add snippet to #undef
  USE_LD_AS_NEEDED.

gnu: Switch to GCC 4.8 as the default compiler.

* build-aux/download.scm (file-name->uri): Update URL to /20131110.
* gnu-system.am (nodist_bootstrap_x86_64_linux_DATA,
  nodist_bootstrap_i686_linux_DATA): Change base name to
  'guile-2.0.9.tar.xz'.
  (gnu/packages/bootstrap/x86_64-linux/guile-2.0.9.tar.xz,
  gnu/packages/bootstrap/i686-linux/guile-2.0.9.tar.xz): New targets.
  (gnu/packages/bootstrap/x86_64-linux/guile-2.0.7.tar.xz,
  gnu/packages/bootstrap/i686-linux/guile-2.0.7.tar.xz): Remove.
  (gnu/packages/bootstrap/mips64el-linux/guile-2.0.9.tar.xz): Update
  hash.
* gnu/packages/base.scm (gcc-boot0): Base upon GCC-4.8.  Enable C++, and
  add a few --disable flags.  Remove MPFR workaround.
  (cross-gcc-wrapper): Base upon GCC-4.8.  Wrap both 'gcc' and 'g++'.
  (libstdc++): New variable.
  (gcc-final): Add it as an input; pass corresponding -I and -L flags.
* gnu/packages/bootstrap.scm (%bootstrap-guile): Always use
  "guile-2.0.9.tar.xz.
  (%bootstrap-coreutils&co): Update hashes.
  (%bootstrap-binutils): Update URL and hashes.
  (%bootstrap-glibc): Likewise.
  (%bootstrap-gcc): Likewise.
* gnu/packages/gcc.scm (gcc-4.7): Add LDFLAGS.
  Add --disable-libstdcxx-pch.
  Modify the GNU_USER*_SPEC macros from gnu-user*.h instead of the raw
  _SPEC macros.

Merge branch 'master' into core-updates

Conflicts:
	guix/packages.scm