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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 Ludovic Courtès <>
;;; 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
;;; 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 <>.
(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 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
(define (cross p target)
(package (inherit p)
(location (source-properties->location (current-source-location)))
(name (string-append (package-name p) "-cross-" target))
(substitute-keyword-arguments (package-arguments p)
((#:configure-flags flags)
`(cons ,(string-append "--target=" target)
(define (cross-binutils target)
"Return a cross-Binutils for TARGET."
(let ((binutils (package (inherit binutils)
(substitute-keyword-arguments (package-arguments
((#: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
;; `' sets `USE_LIBPATH=yes', which tells
;; elf32.em to use DT_RUNPATH in its search list.
;; See <>.
;; 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)))))))
(cross binutils target)))
(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 gcc-4.8)
(name (string-append "gcc-cross-"
(if libc "" "sans-libc-")
(source (origin (inherit (package-source gcc-4.8))
(list (search-patch "gcc-cross-environment-variables.patch")))))
`(#:implicit-inputs? #f
#:modules ((guix build gnu-build-system)
(guix build utils)
(ice-9 regex)
(srfi srfi-1)
(srfi srfi-26))
,@(substitute-keyword-arguments (package-arguments gcc-4.8)
((#:configure-flags flags)
`(append (list ,(string-append "--target=" target)
,@(gcc-configure-flags-for-triplet target)
,@(if libc
`( ;; Disable features not needed at this stage.
"--disable-shared" "--enable-static"
;; Disable C++ because libstdc++'s
;; configure script otherwise fails with
;; "Link tests are not allowed after
"--disable-threads" ; libgcc, would need libc
"--disable-decimal-float" ; would need libc
,(if libc
`(remove (cut string-match "--enable-languages.*" <>)
((#: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")
((#:phases phases)
(let ((phases
'install 'make-cross-binutils-visible
(lambda* (#:key outputs inputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(libexec (string-append out "/libexec/gcc/"
(binutils (string-append
(assoc-ref inputs "binutils-cross")
"/bin/" ,target "-")))
(for-each (lambda (file)
(symlink (string-append binutils file)
(string-append libexec "/"
'("as" "ld" "nm"))
(if libc
'configure 'set-cross-path
(lambda* (#:key inputs #:allow-other-keys)
;; Add the cross Linux headers to CROSS_CPATH, and remove
;; them from CPATH.
(let ((libc (assoc-ref inputs "libc"))
(linux (assoc-ref inputs
(define (cross? x)
;; Return #t if X is a cross-libc or cross Linux.
(or (string-prefix? libc x)
(string-prefix? linux x)))
(setenv "CROSS_CPATH"
(string-append libc "/include:"
linux "/include"))
(string-append libc "/lib"))
(let ((cpath (search-path-as-string->list
(getenv "CPATH")))
(libpath (search-path-as-string->list
(getenv "LIBRARY_PATH"))))
(setenv "CPATH"
(remove cross? cpath) ":"))
(setenv "LIBRARY_PATH"
(remove cross? libpath) ":"))
((#:strip-binaries? _)
;; Disable stripping as this can break binaries, with object files
;; of libgcc.a showing up as having an unknown architecture. See
;; <>
;; for instance.
`(("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 gcc-4.8)
(alist-delete "libc" %final-inputs))))
(if libc
`(("libc" ,libc)
(inputs '())
;; Only search target inputs, not host inputs.
(list (search-path-specification
(variable "CROSS_CPATH")
(directories '("include")))
(directories '("lib" "lib64")))))
(native-search-paths '())))
(define* (cross-libc target
(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))
(substitute-keyword-arguments (package-arguments linux-libre-headers)
((#:phases phases)
(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"))))
(native-inputs `(("cross-gcc" ,xgcc)
("cross-binutils" ,xbinutils)
,@(package-native-inputs linux-libre-headers)))))
(package (inherit glibc)
(name (string-append "glibc-cross-" target))
`(#:strip-binaries? #f ; disable stripping (see above)
,@(package-arguments glibc))
((#:configure-flags flags)
`(cons ,(string-append "--host=" target)
((#:phases phases)
'configure 'set-cross-linux-headers-path
(lambda* (#:key inputs #:allow-other-keys)
(let ((linux (assoc-ref inputs "cross-linux-headers")))
(setenv "CROSS_CPATH"
(string-append linux "/include"))
(propagated-inputs `(("cross-linux-headers" ,xlinux-headers)))
(native-inputs `(("cross-gcc" ,xgcc)
("cross-binutils" ,xbinutils)
,@(package-native-inputs glibc)))))
;;; Concrete cross toolchains.
(define-public xgcc-mips64el
(let ((triplet "mips64el-linux-gnuabi64")) ; N64 ABI
(cross-gcc triplet
(cross-binutils triplet)
(cross-libc triplet))))
;; (define-public xgcc-armel
;; (let ((triplet "armel-linux-gnueabi"))
;; (cross-gcc triplet
;; (cross-binutils triplet)
;; (cross-libc triplet))))