1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2015, 2018 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2016 Manolis Fragkiskos Ragkousis <manolis837@gmail.com>
;;; Copyright © 2019 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2019 Carl Dong <contact@carldong.me>
;;;
;;; 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* (patch-genmultilib-shebang #:key inputs native-inputs #:allow-other-keys)
"Patch shebangs in the gcc/genmultilib file as it contains several scripts
inside, each with a #!/bin/sh that needs patching."
(substitute* "gcc/genmultilib"
(("#!/bin/sh")
(string-append "#!" (assoc-ref (or native-inputs inputs) "bash")
"/bin/bash"))))
(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 target #: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 "/" target "/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")))
(invoke "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")
(("@DEFAULT_WIN32_WINNT@")
"0x502")
(("@DEFAULT_MSVCRT_VERSION@")
"0x700"))
(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 "/" target "/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.
(invoke "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-after 'unpack 'patch-genmultilib-shebang
patch-genmultilib-shebang)
(add-before 'configure 'set-cross-path
;; This mingw32 target checking logic should match that of target-mingw?
;; in (guix utils), but (guix utils) is too large too copy over to the
;; build side entirely and for now we have no way to select variables to
;; copy over. See (gnu packages cross-base) for more details.
(if (string-suffix? "-mingw32" target)
(cut set-cross-path/mingw #:target target <...>)
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
|