packages: Make 'location' field innate.

* guix/packages.scm (<package>)[location]: Add 'innate' property.
* guix/build-system/gnu.scm (static-package): Remove 'loc' parameter and
  'location' field.
* gnu/packages/autotools.scm (autoconf-wrapper): Remove 'location' field.
* gnu/packages/commencement.scm (gnu-make-boot0, diffutils-boot0, gcc-final):
  Likewise.
* gnu/packages/cross-base.scm (cross): Likewise.
* gnu/packages/emacs.scm (emacs-no-x, emacs-no-x-toolkit): Likewise.
* gnu/packages/make-bootstrap.scm (tarball-package): Likewise.
* gnu/packages/maths.scm (petsc-complex): Likewise.

gnu/packages/autotools.scm

@@ -95,7 +95,6 @@ use our own Bash instead of /bin/sh in shebangs.  For that reason, it should
 only be used internally---users should not end up distributing `configure'
 files with a system-specific shebang."
   (package (inherit autoconf)
-    (location (source-properties->location (current-source-location)))
     (name (string-append (package-name autoconf) "-wrapper"))
     (build-system trivial-build-system)
     (inputs `(("guile"

gnu/packages/commencement.scm

@@ -65,7 +65,6 @@
   (package-with-bootstrap-guile
    (package (inherit gnu-make)
      (name "make-boot0")
-     (location (source-properties->location (current-source-location)))
      (arguments
       `(#:guile ,%bootstrap-guile
         #:implicit-inputs? #f
@@ -93,7 +92,6 @@
                                             ,@%bootstrap-inputs)
                                           #:guile %bootstrap-guile)))
      (package (inherit p)
-       (location (source-properties->location (current-source-location)))
        (arguments `(#:tests? #f         ; the test suite needs diffutils
                     ,@(package-arguments p)))))))
 
@@ -531,7 +529,6 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
   ;; The final GCC.
   (package (inherit gcc-boot0)
     (name "gcc")
-    (location (source-properties->location (current-source-location)))
     (arguments
      `(#:guile ,%bootstrap-guile
        #:implicit-inputs? #f

gnu/packages/cross-base.scm

@@ -38,7 +38,6 @@
 
 (define (cross p target)
   (package (inherit p)
-    (location (source-properties->location (current-source-location)))
     (name (string-append (package-name p) "-cross-" target))
     (arguments
      (substitute-keyword-arguments (package-arguments p)

gnu/packages/emacs.scm

@@ -123,7 +123,6 @@ languages.")
   ;; This is the version that you should use as an input to packages that just
   ;; need to byte-compile .el files.
   (package (inherit emacs)
-    (location (source-properties->location (current-source-location)))
     (name "emacs-no-x")
     (synopsis "The extensible, customizable, self-documenting text
 editor (console only)")
@@ -138,7 +137,6 @@ editor (console only)")
 
 (define-public emacs-no-x-toolkit
   (package (inherit emacs)
-    (location (source-properties->location (current-source-location)))
     (name "emacs-no-x-toolkit")
     (synopsis "The extensible, customizable, self-documenting text
 editor (without an X toolkit)" )

gnu/packages/make-bootstrap.scm

@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -605,7 +605,6 @@ for `sh' in $PATH, and without nscd, and with static NSS modules."
 (define (tarball-package pkg)
   "Return a package containing a tarball of PKG."
   (package (inherit pkg)
-    (location (source-properties->location (current-source-location)))
     (name (string-append (package-name pkg) "-tarball"))
     (build-system trivial-build-system)
     (native-inputs `(("tar" ,tar)

gnu/packages/maths.scm

@@ -560,7 +560,6 @@ scientific applications modeled by partial differential equations.")
 
 (define-public petsc-complex
   (package (inherit petsc)
-    (location (source-properties->location (current-source-location)))
     (name "petsc-complex")
     (arguments
      (substitute-keyword-arguments (package-arguments petsc)

guix/build-system/gnu.scm

@@ -160,12 +160,10 @@ flags for VARIABLE, the associated value is augmented."
   "A version of P linked with `-static-gcc'."
   (package-with-extra-configure-variable p "LDFLAGS" "-static-libgcc"))
 
-(define* (static-package p #:optional (loc (current-source-location))
-                         #:key (strip-all? #t))
+(define* (static-package p #:key (strip-all? #t))
   "Return a statically-linked version of package P.  If STRIP-ALL? is true,
 use `--strip-all' as the arguments to `strip'."
   (package (inherit p)
-    (location (source-properties->location loc))
     (arguments
      (let ((a (default-keyword-arguments (package-arguments p)
                 '(#:configure-flags '()

guix/packages.scm

@@ -240,7 +240,8 @@ representation."
 
   (location package-location
             (default (and=> (current-source-location)
-                            source-properties->location))))
+                            source-properties->location))
+            (innate)))
 
 (set-record-type-printer! <package>
                           (lambda (package port)