[jackhill/guix/guix.git] / gnu / packages / cross-base.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages cross-base)
  #:use-module (guix licenses)
  #:use-module (gnu packages)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages base)
  #:use-module (gnu packages commencement)
  #:use-module (gnu packages linux)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system trivial)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match)
  #:export (cross-binutils
            cross-libc
            cross-gcc))

(define %xgcc
  ;; GCC package used as the basis for cross-compilation.  It doesn't have to
  ;; be 'gcc' and can be a specific variant such as 'gcc-4.8'.
  gcc)

(define (cross p target)
  (package (inherit p)
    (name (string-append (package-name p) "-cross-" target))
    (arguments
     (substitute-keyword-arguments (package-arguments p)
       ((#:configure-flags flags)
        `(cons ,(string-append "--target=" target)
               ,flags))))))

(define (package-with-patch original patch)
  "Return package ORIGINAL with PATCH applied."
  (package (inherit original)
    (source (origin (inherit (package-source original))
              (patches (list patch))))))

(define (cross-binutils target)
  "Return a cross-Binutils for TARGET."
  (let ((binutils (package (inherit binutils)
                    (arguments
                     (substitute-keyword-arguments (package-arguments
                                                    binutils)
                       ((#:configure-flags flags)
                        ;; Build with `--with-sysroot' so that ld honors
                        ;; DT_RUNPATH entries when searching for a needed
                        ;; library.  This works because as a side effect
                        ;; `genscripts.sh' sets `USE_LIBPATH=yes', which tells
                        ;; elf32.em to use DT_RUNPATH in its search list.
                        ;; See <http://sourceware.org/ml/binutils/2013-05/msg00312.html>.
                        ;;
                        ;; In theory choosing / as the sysroot could lead ld
                        ;; to pick up native libs instead of target ones.  In
                        ;; practice the RUNPATH of target libs only refers to
                        ;; target libs, not native libs, so this is safe.
                        `(cons "--with-sysroot=/" ,flags)))))))

    ;; For Xtensa, apply Qualcomm's patch.
    (cross (if (string-prefix? "xtensa-" target)
               (package-with-patch binutils
                                   (search-patch
                                    "ath9k-htc-firmware-binutils.patch"))
               binutils)
           target)))

(define (cross-gcc-arguments target libc)
  "Return build system arguments for a cross-gcc for TARGET, using LIBC (which
may be either a libc package or #f.)"
  ;; Set the current target system so that 'glibc-dynamic-linker' returns the
  ;; right name.
  (parameterize ((%current-target-system target))
    ;; Disable stripping as this can break binaries, with object files of
    ;; libgcc.a showing up as having an unknown architecture.  See
    ;; <http://lists.fedoraproject.org/pipermail/arm/2010-August/000663.html>
    ;; for instance.
    (let ((args `(#:strip-binaries? #f
                  ,@(package-arguments %xgcc))))
     (substitute-keyword-arguments args
       ((#:configure-flags flags)
        `(append (list ,(string-append "--target=" target)
                       ,@(if libc
                             `( ;; Disable libcilkrts because it is not
                                ;; ported to GNU/Hurd. 
                               "--disable-libcilkrts")
                             `( ;; Disable features not needed at this stage.
                               "--disable-shared" "--enable-static"
                               "--enable-languages=c,c++"

                               ;; libstdc++ cannot be built at this stage
                               ;; ("Link tests are not allowed after
                               ;; GCC_NO_EXECUTABLES.").
                               "--disable-libstdc++-v3"

                               "--disable-threads" ;libgcc, would need libc
                               "--disable-libatomic"
                               "--disable-libmudflap"
                               "--disable-libgomp"
                               "--disable-libssp"
                               "--disable-libquadmath"
                               "--disable-decimal-float" ;would need libc
                               "--disable-libcilkrts"

                               ;; When target is any OS other than 'none' these
                               ;; libraries will fail if there is no libc
                               ;; present. See
                               ;; <https://lists.gnu.org/archive/html/guix-devel/2016-02/msg01311.html>
                               "--disable-libitm"
                               "--disable-libvtv"
                               "--disable-libsanitizer"
                               )))

                 ,(if libc
                      flags
                      `(remove (cut string-match "--enable-languages.*" <>)
                               ,flags))))
       ((#:make-flags flags)
        (if libc
            `(let ((libc (assoc-ref %build-inputs "libc")))
               ;; FLAGS_FOR_TARGET are needed for the target libraries to receive
               ;; the -Bxxx for the startfiles.
               (cons (string-append "FLAGS_FOR_TARGET=-B" libc "/lib")
                     ,flags))
            flags))
       ((#:phases phases)
        (let ((phases
               `(alist-cons-after
                 'install 'make-cross-binutils-visible
                 (lambda* (#:key outputs inputs #:allow-other-keys)
                   (let* ((out      (assoc-ref outputs "out"))
                          (libexec  (string-append out "/libexec/gcc/"
                                                   ,target))
                          (binutils (string-append
                                     (assoc-ref inputs "binutils-cross")
                                     "/bin/" ,target "-"))
                          (wrapper  (string-append
                                     (assoc-ref inputs "ld-wrapper-cross")
                                     "/bin/" ,target "-ld")))
                     (for-each (lambda (file)
                                 (symlink (string-append binutils file)
                                          (string-append libexec "/"
                                                         file)))
                               '("as" "nm"))
                     (symlink wrapper (string-append libexec "/ld"))
                     #t))
                 (alist-replace
                  'install
                  (lambda _
                    ;; Unlike our 'strip' phase, this will do the right thing
                    ;; for cross-compilers.
                    (zero? (system* "make" "install-strip")))
                  ,phases))))
          (if libc
              `(alist-cons-before
                'configure 'set-cross-path
                (lambda* (#:key inputs #:allow-other-keys)
                  ;; Add the cross kernel headers to CROSS_CPATH, and remove them
                  ;; from CPATH.
                  (let ((libc  (assoc-ref inputs "libc"))
                        (kernel (assoc-ref inputs "xkernel-headers")))
                    (define (cross? x)
                      ;; Return #t if X is a cross-libc or cross Linux.
                      (or (string-prefix? libc x)
                          (string-prefix? kernel x)))
                    (let ((cpath (string-append
                                  libc "/include"
                                  ":" kernel "/include")))
                      (for-each (cut setenv <> cpath)
                                '("CROSS_C_INCLUDE_PATH"
                                  "CROSS_CPLUS_INCLUDE_PATH"
                                  "CROSS_OBJC_INCLUDE_PATH"
                                  "CROSS_OBJCPLUS_INCLUDE_PATH")))
                    (setenv "CROSS_LIBRARY_PATH"
                            (string-append libc "/lib:"
                                           kernel "/lib")) ;for Hurd's libihash
                    (for-each
                     (lambda (var)
                       (and=> (getenv var)
                              (lambda (value)
                                (let* ((path (search-path-as-string->list value))
                                       (native-path (list->search-path-as-string
                                                     (remove cross? path) ":")))
                                  (setenv var native-path)))))
                              '("C_INCLUDE_PATH"
                                "CPLUS_INCLUDE_PATH"
                                "OBJC_INCLUDE_PATH"
                                "OBJCPLUS_INCLUDE_PATH"
                                "LIBRARY_PATH"))
                    #t))
                ,phases)
              phases)))))))

(define (cross-gcc-patches target)
  "Return GCC patches needed for TARGET."
  (cond ((string-prefix? "xtensa-" target)
         ;; Patch by Qualcomm needed to build the ath9k-htc firmware.
         (search-patches "ath9k-htc-firmware-gcc.patch"))
        (else '())))

(define* (cross-gcc target
                    #:optional (xbinutils (cross-binutils target)) libc)
  "Return a cross-compiler for TARGET, where TARGET is a GNU triplet.  Use
XBINUTILS as the associated cross-Binutils.  If LIBC is false, then build a
GCC that does not target a libc; otherwise, target that libc."
  (package (inherit %xgcc)
    (name (string-append "gcc-cross-"
                         (if libc "" "sans-libc-")
                         target))
    (source (origin (inherit (package-source %xgcc))
              (patches
               (append
                (origin-patches (package-source %xgcc))
                (cons (search-patch "gcc-cross-environment-variables.patch")
                      (cross-gcc-patches target))))))

    ;; For simplicity, use a single output.  Otherwise libgcc_s & co. are not
    ;; found by default, etc.
    (outputs '("out"))

    (arguments
     `(#:implicit-inputs? #f
       #:modules ((guix build gnu-build-system)
                  (guix build utils)
                  (ice-9 regex)
                  (srfi srfi-1)
                  (srfi srfi-26))

       ,@(cross-gcc-arguments target libc)))

    (native-inputs
     `(("ld-wrapper-cross" ,(make-ld-wrapper
                             (string-append "ld-wrapper-" target)
                             #:target target
                             #:binutils xbinutils))
       ("binutils-cross" ,xbinutils)

       ;; Call it differently so that the builder can check whether the "libc"
       ;; input is #f.
       ("libc-native" ,@(assoc-ref %final-inputs "libc"))

       ;; Remaining inputs.
       ,@(let ((inputs (append (package-inputs %xgcc)
                               (alist-delete "libc" %final-inputs))))
           (if libc
               `(("libc" ,libc)
                 ("xkernel-headers"                ;the target headers
                  ,@(assoc-ref (package-propagated-inputs libc)
                               "kernel-headers"))
                 ,@inputs)
               inputs))))

    (inputs '())

    ;; Only search target inputs, not host inputs.
    ;; Note: See <http://bugs.gnu.org/22186> for why not 'CPATH'.
    (search-paths
     (list (search-path-specification
            (variable "CROSS_C_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CROSS_CPLUS_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CROSS_OBJC_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CROSS_OBJCPLUS_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CROSS_LIBRARY_PATH")
            (files '("lib" "lib64")))))
    (native-search-paths '())))

(define* (cross-libc target
                     #:optional
                     (xgcc (cross-gcc target))
                     (xbinutils (cross-binutils target)))
  "Return a libc cross-built for TARGET, a GNU triplet.  Use XGCC and
XBINUTILS and the cross tool chain."
  (define xlinux-headers
    (package (inherit linux-libre-headers)
      (name (string-append (package-name linux-libre-headers)
                           "-cross-" target))
      (arguments
       (substitute-keyword-arguments
           `(#:implicit-cross-inputs? #f
             ,@(package-arguments linux-libre-headers))
         ((#:phases phases)
          `(alist-replace
            'build
            (lambda _
              (setenv "ARCH" ,(system->linux-architecture target))
              (format #t "`ARCH' set to `~a' (cross compiling)~%" (getenv "ARCH"))

              (and (zero? (system* "make" "defconfig"))
                   (zero? (system* "make" "mrproper" "headers_check"))))
            ,phases))))
      (native-inputs `(("cross-gcc" ,xgcc)
                       ("cross-binutils" ,xbinutils)
                       ,@(package-native-inputs linux-libre-headers)))))

  (package (inherit glibc)
    (name (string-append "glibc-cross-" target))
    (arguments
     (substitute-keyword-arguments
         `(;; Disable stripping (see above.)
           #:strip-binaries? #f

           ;; This package is used as a target input, but it should not have
           ;; the usual cross-compilation inputs since that would include
           ;; itself.
           #:implicit-cross-inputs? #f

           ;; We need SRFI 26.
           #:modules ((guix build gnu-build-system)
                      (guix build utils)
                      (srfi srfi-26))

           ,@(package-arguments glibc))
       ((#:configure-flags flags)
        `(cons ,(string-append "--host=" target)
               ,flags))
       ((#:phases phases)
        `(alist-cons-before
          'configure 'set-cross-kernel-headers-path
          (lambda* (#:key inputs #:allow-other-keys)
            (let* ((kernel (assoc-ref inputs "kernel-headers"))
                   (cpath (string-append kernel "/include")))
              (for-each (cut setenv <> cpath)
                        '("CROSS_C_INCLUDE_PATH"
                          "CROSS_CPLUS_INCLUDE_PATH"
                          "CROSS_OBJC_INCLUDE_PATH"
                          "CROSS_OBJCPLUS_INCLUDE_PATH"))
              #t))
          ,phases))))

    ;; Shadow the native "kernel-headers" because glibc's recipe expects the
    ;; "kernel-headers" input to point to the right thing.
    (propagated-inputs `(("kernel-headers" ,xlinux-headers)))

    ;; FIXME: 'static-bash' should really be an input, not a native input, but
    ;; to do that will require building an intermediate cross libc.
    (inputs '())

    (native-inputs `(("cross-gcc" ,xgcc)
                     ("cross-binutils" ,xbinutils)
                     ,@(package-inputs glibc)     ;FIXME: static-bash
                     ,@(package-native-inputs glibc)))))

\f
;;;
;;; Concrete cross toolchains.
;;;

(define-public xgcc-mips64el
  (let* ((triplet "mips64el-linux-gnuabi64")      ;N64 ABI
         (xgcc    (cross-gcc triplet
                             (cross-binutils triplet)
                             (cross-libc triplet))))
    ;; Don't attempt to build this cross-compiler on i686;
    ;; see <http://bugs.gnu.org/19598>.
    (package (inherit xgcc)
      (supported-systems (fold delete
                               (package-supported-systems xgcc)
                               '("mips64el-linux" "i686-linux"))))))

(define-public xgcc-xtensa
  ;; Bare-bones Xtensa cross-compiler, used to build the Atheros firmware.
  (cross-gcc "xtensa-elf"))

(define-public xgcc-armhf
  (let* ((triplet "arm-linux-gnueabihf")
         (xgcc    (cross-gcc triplet
                             (cross-binutils triplet)
                             (cross-libc triplet))))
    (package (inherit xgcc)
      (supported-systems (delete "armhf-linux" %supported-systems)))))

;; (define-public xgcc-armel
;;   (let ((triplet "armel-linux-gnueabi"))
;;     (cross-gcc triplet
;;                (cross-binutils triplet)
;;                (cross-libc triplet))))
Commit	Line	Data
827d2891	1	;;; GNU Guix --- Functional package management for GNU
e8e2e18b	2	;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
3f00ff8b	3	;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
efc4eb14	4	;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
827d2891 LC	5	;;;
	6	;;; This file is part of GNU Guix.
	7	;;;
	8	;;; GNU Guix is free software; you can redistribute it and/or modify it
	9	;;; under the terms of the GNU General Public License as published by
	10	;;; the Free Software Foundation; either version 3 of the License, or (at
	11	;;; your option) any later version.
	12	;;;
	13	;;; GNU Guix is distributed in the hope that it will be useful, but
	14	;;; WITHOUT ANY WARRANTY; without even the implied warranty of
	15	;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	;;; GNU General Public License for more details.
	17	;;;
	18	;;; You should have received a copy of the GNU General Public License
	19	;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
	20
	21	(define-module (gnu packages cross-base)
	22	#:use-module (guix licenses)
	23	#:use-module (gnu packages)
f594028a	24	#:use-module (gnu packages gcc)
827d2891	25	#:use-module (gnu packages base)
bdb36958	26	#:use-module (gnu packages commencement)
827d2891 LC	27	#:use-module (gnu packages linux)
	28	#:use-module (guix packages)
	29	#:use-module (guix download)
	30	#:use-module (guix utils)
	31	#:use-module (guix build-system gnu)
	32	#:use-module (guix build-system trivial)
	33	#:use-module (srfi srfi-1)
	34	#:use-module (srfi srfi-26)
264218a4 LC	35	#:use-module (ice-9 match)
	36	#:export (cross-binutils
	37	cross-libc
	38	cross-gcc))
827d2891	39
c92f1c0a LC	40	(define %xgcc
	41	;; GCC package used as the basis for cross-compilation. It doesn't have to
	42	;; be 'gcc' and can be a specific variant such as 'gcc-4.8'.
	43	gcc)
	44
827d2891 LC	45	(define (cross p target)
827d2891 LC	46	(package (inherit p)
827d2891 LC	47	(name (string-append (package-name p) "-cross-" target))
	48	(arguments
	49	(substitute-keyword-arguments (package-arguments p)
	50	((#:configure-flags flags)
	51	`(cons ,(string-append "--target=" target)
	52	,flags))))))
	53
1306b0b0 LC	54	(define (package-with-patch original patch)
	55	"Return package ORIGINAL with PATCH applied."
	56	(package (inherit original)
	57	(source (origin (inherit (package-source original))
	58	(patches (list patch))))))
	59
47e74d6e LC	60	(define (cross-binutils target)
	61	"Return a cross-Binutils for TARGET."
	62	(let ((binutils (package (inherit binutils)
	63	(arguments
	64	(substitute-keyword-arguments (package-arguments
	65	binutils)
	66	((#:configure-flags flags)
	67	;; Build with `--with-sysroot' so that ld honors
	68	;; DT_RUNPATH entries when searching for a needed
	69	;; library. This works because as a side effect
	70	;; `genscripts.sh' sets `USE_LIBPATH=yes', which tells
	71	;; elf32.em to use DT_RUNPATH in its search list.
c8fa51f2 LC	72	;; See <http://sourceware.org/ml/binutils/2013-05/msg00312.html>.
	73	;;
	74	;; In theory choosing / as the sysroot could lead ld
	75	;; to pick up native libs instead of target ones. In
	76	;; practice the RUNPATH of target libs only refers to
	77	;; target libs, not native libs, so this is safe.
	78	`(cons "--with-sysroot=/" ,flags)))))))
1306b0b0 LC	79
	80	;; For Xtensa, apply Qualcomm's patch.
	81	(cross (if (string-prefix? "xtensa-" target)
	82	(package-with-patch binutils
	83	(search-patch
	84	"ath9k-htc-firmware-binutils.patch"))
	85	binutils)
	86	target)))
827d2891	87
cdb4b4b3 LC	88	(define (cross-gcc-arguments target libc)
	89	"Return build system arguments for a cross-gcc for TARGET, using LIBC (which
	90	may be either a libc package or #f.)"
b4469d8c LC	91	;; Set the current target system so that 'glibc-dynamic-linker' returns the
	92	;; right name.
	93	(parameterize ((%current-target-system target))
2a1552c6 LC	94	;; Disable stripping as this can break binaries, with object files of
	95	;; libgcc.a showing up as having an unknown architecture. See
	96	;; <http://lists.fedoraproject.org/pipermail/arm/2010-August/000663.html>
	97	;; for instance.
	98	(let ((args `(#:strip-binaries? #f
c92f1c0a	99	,@(package-arguments %xgcc))))
2a1552c6 LC	100	(substitute-keyword-arguments args
	101	((#:configure-flags flags)
	102	`(append (list ,(string-append "--target=" target)
	103	,@(if libc
8fd857f5 MR	104	`( ;; Disable libcilkrts because it is not
	105	;; ported to GNU/Hurd.
	106	"--disable-libcilkrts")
2a1552c6 LC	107	`( ;; Disable features not needed at this stage.
2a1552c6 LC	108	"--disable-shared" "--enable-static"
ca7ef4d4	109	"--enable-languages=c,c++"
cdb4b4b3	110
ca7ef4d4 RW	111	;; libstdc++ cannot be built at this stage
	112	;; ("Link tests are not allowed after
	113	;; GCC_NO_EXECUTABLES.").
	114	"--disable-libstdc++-v3"
cdb4b4b3	115
2a1552c6 LC	116	"--disable-threads" ;libgcc, would need libc
	117	"--disable-libatomic"
	118	"--disable-libmudflap"
	119	"--disable-libgomp"
	120	"--disable-libssp"
	121	"--disable-libquadmath"
	122	"--disable-decimal-float" ;would need libc
8fd857f5	123	"--disable-libcilkrts"
9a745d76 MR	124
	125	;; When target is any OS other than 'none' these
	126	;; libraries will fail if there is no libc
	127	;; present. See
	128	;; <https://lists.gnu.org/archive/html/guix-devel/2016-02/msg01311.html>
	129	"--disable-libitm"
	130	"--disable-libvtv"
	131	"--disable-libsanitizer"
2a1552c6	132	)))
cdb4b4b3	133
2a1552c6 LC	134	,(if libc
	135	flags
	136	`(remove (cut string-match "--enable-languages.*" <>)
	137	,flags))))
	138	((#:make-flags flags)
	139	(if libc
	140	`(let ((libc (assoc-ref %build-inputs "libc")))
	141	;; FLAGS_FOR_TARGET are needed for the target libraries to receive
	142	;; the -Bxxx for the startfiles.
	143	(cons (string-append "FLAGS_FOR_TARGET=-B" libc "/lib")
	144	,flags))
	145	flags))
	146	((#:phases phases)
	147	(let ((phases
	148	`(alist-cons-after
	149	'install 'make-cross-binutils-visible
	150	(lambda* (#:key outputs inputs #:allow-other-keys)
	151	(let* ((out (assoc-ref outputs "out"))
	152	(libexec (string-append out "/libexec/gcc/"
	153	,target))
	154	(binutils (string-append
	155	(assoc-ref inputs "binutils-cross")
	156	"/bin/" ,target "-"))
	157	(wrapper (string-append
	158	(assoc-ref inputs "ld-wrapper-cross")
	159	"/bin/" ,target "-ld")))
	160	(for-each (lambda (file)
	161	(symlink (string-append binutils file)
	162	(string-append libexec "/"
	163	file)))
	164	'("as" "nm"))
	165	(symlink wrapper (string-append libexec "/ld"))
	166	#t))
	167	(alist-replace
	168	'install
	169	(lambda _
	170	;; Unlike our 'strip' phase, this will do the right thing
	171	;; for cross-compilers.
	172	(zero? (system* "make" "install-strip")))
	173	,phases))))
	174	(if libc
	175	`(alist-cons-before
	176	'configure 'set-cross-path
	177	(lambda* (#:key inputs #:allow-other-keys)
55de892b	178	;; Add the cross kernel headers to CROSS_CPATH, and remove them
2a1552c6 LC	179	;; from CPATH.
2a1552c6 LC	180	(let ((libc (assoc-ref inputs "libc"))
55de892b	181	(kernel (assoc-ref inputs "xkernel-headers")))
2a1552c6 LC	182	(define (cross? x)
	183	;; Return #t if X is a cross-libc or cross Linux.
	184	(or (string-prefix? libc x)
55de892b	185	(string-prefix? kernel x)))
efc4eb14 JN	186	(let ((cpath (string-append
efc4eb14 JN	187	libc "/include"
eb74eb41	188	":" kernel "/include")))
efc4eb14 JN	189	(for-each (cut setenv <> cpath)
	190	'("CROSS_C_INCLUDE_PATH"
	191	"CROSS_CPLUS_INCLUDE_PATH"
	192	"CROSS_OBJC_INCLUDE_PATH"
	193	"CROSS_OBJCPLUS_INCLUDE_PATH")))
2a1552c6	194	(setenv "CROSS_LIBRARY_PATH"
8956d07a MR	195	(string-append libc "/lib:"
8956d07a MR	196	kernel "/lib")) ;for Hurd's libihash
efc4eb14 JN	197	(for-each
	198	(lambda (var)
	199	(and=> (getenv var)
	200	(lambda (value)
	201	(let* ((path (search-path-as-string->list value))
	202	(native-path (list->search-path-as-string
	203	(remove cross? path) ":")))
	204	(setenv var native-path)))))
	205	'("C_INCLUDE_PATH"
	206	"CPLUS_INCLUDE_PATH"
	207	"OBJC_INCLUDE_PATH"
	208	"OBJCPLUS_INCLUDE_PATH"
	209	"LIBRARY_PATH"))
	210	#t))
2a1552c6 LC	211	,phases)
2a1552c6 LC	212	phases)))))))
cdb4b4b3	213
1306b0b0 LC	214	(define (cross-gcc-patches target)
	215	"Return GCC patches needed for TARGET."
	216	(cond ((string-prefix? "xtensa-" target)
	217	;; Patch by Qualcomm needed to build the ath9k-htc firmware.
fc1adab1	218	(search-patches "ath9k-htc-firmware-gcc.patch"))
1306b0b0 LC	219	(else '())))
1306b0b0 LC	220
827d2891 LC	221	(define* (cross-gcc target
	222	#:optional (xbinutils (cross-binutils target)) libc)
	223	"Return a cross-compiler for TARGET, where TARGET is a GNU triplet. Use
	224	XBINUTILS as the associated cross-Binutils. If LIBC is false, then build a
	225	GCC that does not target a libc; otherwise, target that libc."
c92f1c0a	226	(package (inherit %xgcc)
827d2891 LC	227	(name (string-append "gcc-cross-"
	228	(if libc "" "sans-libc-")
	229	target))
c92f1c0a	230	(source (origin (inherit (package-source %xgcc))
01eafd38	231	(patches
1421afa9	232	(append
c92f1c0a	233	(origin-patches (package-source %xgcc))
1421afa9 MW	234	(cons (search-patch "gcc-cross-environment-variables.patch")
1421afa9 MW	235	(cross-gcc-patches target))))))
a49c57a7 LC	236
	237	;; For simplicity, use a single output. Otherwise libgcc_s & co. are not
	238	;; found by default, etc.
	239	(outputs '("out"))
	240
827d2891 LC	241	(arguments
	242	`(#:implicit-inputs? #f
	243	#:modules ((guix build gnu-build-system)
	244	(guix build utils)
	245	(ice-9 regex)
	246	(srfi srfi-1)
	247	(srfi srfi-26))
827d2891	248
cdb4b4b3	249	,@(cross-gcc-arguments target libc)))
0de71c23 LC	250
0de71c23 LC	251	(native-inputs
4a740d0f LC	252	`(("ld-wrapper-cross" ,(make-ld-wrapper
	253	(string-append "ld-wrapper-" target)
	254	#:target target
	255	#:binutils xbinutils))
	256	("binutils-cross" ,xbinutils)
827d2891 LC	257
	258	;; Call it differently so that the builder can check whether the "libc"
	259	;; input is #f.
	260	("libc-native" ,@(assoc-ref %final-inputs "libc"))
	261
	262	;; Remaining inputs.
c92f1c0a	263	,@(let ((inputs (append (package-inputs %xgcc)
827d2891 LC	264	(alist-delete "libc" %final-inputs))))
	265	(if libc
	266	`(("libc" ,libc)
55de892b	267	("xkernel-headers" ;the target headers
aa27987f	268	,@(assoc-ref (package-propagated-inputs libc)
55de892b	269	"kernel-headers"))
827d2891	270	,@inputs)
17bb886f LC	271	inputs))))
17bb886f LC	272
0de71c23 LC	273	(inputs '())
0de71c23 LC	274
17bb886f	275	;; Only search target inputs, not host inputs.
efc4eb14	276	;; Note: See <http://bugs.gnu.org/22186> for why not 'CPATH'.
17bb886f LC	277	(search-paths
17bb886f LC	278	(list (search-path-specification
efc4eb14 JN	279	(variable "CROSS_C_INCLUDE_PATH")
	280	(files '("include")))
	281	(search-path-specification
	282	(variable "CROSS_CPLUS_INCLUDE_PATH")
	283	(files '("include")))
	284	(search-path-specification
	285	(variable "CROSS_OBJC_INCLUDE_PATH")
	286	(files '("include")))
	287	(search-path-specification
	288	(variable "CROSS_OBJCPLUS_INCLUDE_PATH")
af070955	289	(files '("include")))
17bb886f LC	290	(search-path-specification
17bb886f LC	291	(variable "CROSS_LIBRARY_PATH")
af070955	292	(files '("lib" "lib64")))))
17bb886f	293	(native-search-paths '())))
827d2891 LC	294
	295	(define* (cross-libc target
	296	#:optional
	297	(xgcc (cross-gcc target))
	298	(xbinutils (cross-binutils target)))
	299	"Return a libc cross-built for TARGET, a GNU triplet. Use XGCC and
	300	XBINUTILS and the cross tool chain."
	301	(define xlinux-headers
	302	(package (inherit linux-libre-headers)
	303	(name (string-append (package-name linux-libre-headers)
	304	"-cross-" target))
	305	(arguments
0d5a559f LC	306	(substitute-keyword-arguments
	307	`(#:implicit-cross-inputs? #f
	308	,@(package-arguments linux-libre-headers))
827d2891 LC	309	((#:phases phases)
	310	`(alist-replace
	311	'build
	312	(lambda _
	313	(setenv "ARCH" ,(system->linux-architecture target))
	314	(format #t "`ARCH' set to `~a' (cross compiling)~%" (getenv "ARCH"))
	315
	316	(and (zero? (system* "make" "defconfig"))
	317	(zero? (system* "make" "mrproper" "headers_check"))))
	318	,phases))))
0de71c23 LC	319	(native-inputs `(("cross-gcc" ,xgcc)
	320	("cross-binutils" ,xbinutils)
	321	,@(package-native-inputs linux-libre-headers)))))
827d2891 LC	322
	323	(package (inherit glibc)
	324	(name (string-append "glibc-cross-" target))
	325	(arguments
	326	(substitute-keyword-arguments
0d5a559f LC	327	`(;; Disable stripping (see above.)
	328	#:strip-binaries? #f
	329
	330	;; This package is used as a target input, but it should not have
	331	;; the usual cross-compilation inputs since that would include
	332	;; itself.
	333	#:implicit-cross-inputs? #f
	334
0158ca7f JN	335	;; We need SRFI 26.
	336	#:modules ((guix build gnu-build-system)
	337	(guix build utils)
	338	(srfi srfi-26))
	339
827d2891 LC	340	,@(package-arguments glibc))
	341	((#:configure-flags flags)
	342	`(cons ,(string-append "--host=" target)
	343	,flags))
	344	((#:phases phases)
	345	`(alist-cons-before
55de892b	346	'configure 'set-cross-kernel-headers-path
827d2891	347	(lambda* (#:key inputs #:allow-other-keys)
eb74eb41 LF	348	(let* ((kernel (assoc-ref inputs "kernel-headers"))
eb74eb41 LF	349	(cpath (string-append kernel "/include")))
efc4eb14 JN	350	(for-each (cut setenv <> cpath)
	351	'("CROSS_C_INCLUDE_PATH"
	352	"CROSS_CPLUS_INCLUDE_PATH"
	353	"CROSS_OBJC_INCLUDE_PATH"
	354	"CROSS_OBJCPLUS_INCLUDE_PATH"))
827d2891 LC	355	#t))
827d2891 LC	356	,phases))))
a4627d49	357
55de892b MR	358	;; Shadow the native "kernel-headers" because glibc's recipe expects the
	359	;; "kernel-headers" input to point to the right thing.
	360	(propagated-inputs `(("kernel-headers" ,xlinux-headers)))
0d5a559f	361
12b0dbd4 LC	362	;; FIXME: 'static-bash' should really be an input, not a native input, but
	363	;; to do that will require building an intermediate cross libc.
	364	(inputs '())
	365
0de71c23 LC	366	(native-inputs `(("cross-gcc" ,xgcc)
0de71c23 LC	367	("cross-binutils" ,xbinutils)
12b0dbd4	368	,@(package-inputs glibc) ;FIXME: static-bash
0de71c23	369	,@(package-native-inputs glibc)))))
827d2891 LC	370
	371	\f
	372	;;;
	373	;;; Concrete cross toolchains.
	374	;;;
	375
	376	(define-public xgcc-mips64el
6ee01481 LC	377	(let* ((triplet "mips64el-linux-gnuabi64") ;N64 ABI
	378	(xgcc (cross-gcc triplet
	379	(cross-binutils triplet)
	380	(cross-libc triplet))))
	381	;; Don't attempt to build this cross-compiler on i686;
	382	;; see <http://bugs.gnu.org/19598>.
	383	(package (inherit xgcc)
9fdd80e8 LC	384	(supported-systems (fold delete
	385	(package-supported-systems xgcc)
	386	'("mips64el-linux" "i686-linux"))))))
827d2891	387
9d307460 LC	388	(define-public xgcc-xtensa
	389	;; Bare-bones Xtensa cross-compiler, used to build the Atheros firmware.
	390	(cross-gcc "xtensa-elf"))
	391
3f00ff8b	392	(define-public xgcc-armhf
9fdd80e8 LC	393	(let* ((triplet "arm-linux-gnueabihf")
	394	(xgcc (cross-gcc triplet
	395	(cross-binutils triplet)
	396	(cross-libc triplet))))
	397	(package (inherit xgcc)
	398	(supported-systems (delete "armhf-linux" %supported-systems)))))
3f00ff8b	399
827d2891 LC	400	;; (define-public xgcc-armel
	401	;; (let ((triplet "armel-linux-gnueabi"))
	402	;; (cross-gcc triplet
	403	;; (cross-binutils triplet)
	404	;; (cross-libc triplet))))