--- /dev/null
+;;; 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
HCoop / jackhill / guix / guix.git / blobdiff