;;; 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> ;;; Copyright © 2016 Manolis Fragkiskos Ragkousis <manolis837@gmail.com> ;;; ;;; 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 build cross-toolchain) #:use-module (guix build utils) #:use-module (guix build gnu-build-system) #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (ice-9 match) #:use-module (ice-9 ftw) #:export (cross-gcc-build-phases)) ;;; Commentary: ;;; ;;; This module provides tools to build a cross-compiler. ;;; ;;; Code: (define %gcc-include-paths ;; Environment variables for header search paths. ;; Note: See <http://bugs.gnu.org/22186> for why not 'CPATH'. '("C_INCLUDE_PATH" "CPLUS_INCLUDE_PATH" "OBJC_INCLUDE_PATH" "OBJCPLUS_INCLUDE_PATH")) (define %gcc-cross-include-paths ;; Search path for target headers when cross-compiling. (map (cut string-append "CROSS_" <>) %gcc-include-paths)) (define* (make-cross-binutils-visible #:key outputs inputs target #:allow-other-keys) "Create symlinks for 'as', 'nm', and 'ld' in the \"out\" output, under libexec/gcc, so that the cross-GCC can find them." (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)) (define* (set-cross-path #:key inputs #:allow-other-keys) "Add the cross kernel headers to CROSS_CPATH, and remove them from C_INCLUDE_PATH et al." (match (assoc-ref inputs "libc") ((? string? libc) (let ((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) %gcc-cross-include-paths)) (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))))) (cons "LIBRARY_PATH" %gcc-include-paths)) #t)) (#f ;; We're building the sans-libc cross-compiler, so nothing to do. #t))) (define* (set-cross-path/mingw #:key inputs #:allow-other-keys) "Add the cross MinGW headers to CROSS_C_*_INCLUDE_PATH, and remove them from C_*INCLUDE_PATH." (let ((libc (assoc-ref inputs "libc")) (gcc (assoc-ref inputs "gcc"))) (define (cross? x) (and libc (string-prefix? libc x))) (define (unpacked-mingw-dir) (match (scandir "." (lambda (name) (string-contains name "mingw-w64"))) ((mingw-dir) (string-append (getcwd) "/" mingw-dir "/mingw-w64-headers")))) (if libc (let ((cpath (string-append libc "/include" ":" libc "/i686-w64-mingw32/include"))) (for-each (cut setenv <> cpath) %gcc-cross-include-paths)) ;; libc is false, so we are building xgcc-sans-libc. ;; Add essential headers from mingw-w64. (let ((mingw-source (assoc-ref inputs "mingw-source"))) (system* "tar" "xvf" mingw-source) (let ((mingw-headers (unpacked-mingw-dir))) ;; We need _mingw.h which will gets built from _mingw.h.in by ;; mingw-w64's configure. We cannot configure mingw-w64 until we ;; have xgcc-sans-libc; substitute to the rescue. (copy-file (string-append mingw-headers "/crt/_mingw.h.in") (string-append mingw-headers "/crt/_mingw.h")) (substitute* (string-append mingw-headers "/crt/_mingw.h") (("@MINGW_HAS_SECURE_API@") "#define MINGW_HAS_SECURE_API 1")) (let ((cpath (string-append mingw-headers "/include" ":" mingw-headers "/crt" ":" mingw-headers "/defaults/include"))) (for-each (cut setenv <> cpath) (cons "CROSS_LIBRARY_PATH" %gcc-cross-include-paths)))))) (when libc (setenv "CROSS_LIBRARY_PATH" (string-append libc "/lib" ":" libc "/i686-w64-mingw32/lib"))) (setenv "CPP" (string-append gcc "/bin/cpp")) (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))))) (cons "LIBRARY_PATH" %gcc-include-paths)) #t)) (define (install-strip . _) "Install a stripped GCC." ;; Unlike our 'strip' phase, this will do the right thing for ;; cross-compilers. (zero? (system* "make" "install-strip"))) (define* (cross-gcc-build-phases target #:optional (phases %standard-phases)) "Modify PHASES to include everything needed to build a cross-GCC for TARGET, a target triplet." (modify-phases phases (add-before 'configure 'set-cross-path (if (string-contains target "mingw") set-cross-path/mingw set-cross-path)) (add-after 'install 'make-cross-binutils-visible (cut make-cross-binutils-visible #:target target <...>)) (replace 'install install-strip))) ;;; cross-toolchain.scm ends here