aboutsummaryrefslogtreecommitdiff
path: root/m4/guix.m4
blob: 716bfb08ec846ec6f4067f929a888bc09e40c28c (plain)
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
dnl GNU Guix --- Functional package management for GNU
dnl Copyright © 2012, 2013, 2014, 2015, 2016, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
dnl Copyright © 2014 Mark H Weaver <mhw@netris.org>
dnl Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
dnl
dnl This file is part of GNU Guix.
dnl
dnl GNU Guix is free software; you can redistribute it and/or modify it
dnl under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or (at
dnl your option) any later version.
dnl
dnl GNU Guix is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

dnl GUIX_SYSTEM_TYPE
dnl
dnl Determine the Guix host system type, and store it in the
dnl `guix_system' variable.
AC_DEFUN([GUIX_SYSTEM_TYPE], [
  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_PATH_PROG([SED], [sed])

  AC_ARG_WITH(system, AC_HELP_STRING([--with-system=SYSTEM],
    [Platform identifier (e.g., `i686-linux').]),
    [guix_system="$withval"],
    [case "$host_cpu" in
       i*86)
	  machine_name="i686";;
       amd64)
          machine_name="x86_64";;
       arm|armv[[7-9]]*)
          # Here we want to exclude CPUs such as "armv6l".  On ARMv7
          # machines, we normally get "armv7l".  However, in Guix, we
          # configure with --build=arm-unknown-linux-gnueabihf, leading
          # to just "arm", so we also have to allow it.
          #
          # TODO: If not cross-compiling, add a sanity check to make
          #       sure this build machine has the needed features to
          #       support executables compiled using our armhf gcc,
          #       configured with:
          #         --with-arch=armv7-a
          #         --with-float=hard
          #         --with-mode=thumb
          #         --with-fpu=vfpv3-d16
	  machine_name="armhf";;
       *)
	  machine_name="$host_cpu";;
     esac

     case "$host_os" in
       linux-gnu*)
	  # For backward compatibility, strip the `-gnu' part.
	  guix_system="$machine_name-linux";;
       gnu*)
          # Always use i586 for GNU/Hurd.
          guix_system="i586-gnu";;
       *)
	  # Strip the version number from names such as `gnu0.3',
	  # `darwin10.2.0', etc.
	  guix_system="$machine_name-`echo $host_os | "$SED" -e's/[0-9.]*$//g'`";;
     esac])

  AC_MSG_CHECKING([for the Guix system type])
  AC_MSG_RESULT([$guix_system])

  AC_SUBST([guix_system])
])

dnl GUIX_ASSERT_SUPPORTED_SYSTEM
dnl
dnl Assert that this is a system to which the distro is ported.
AC_DEFUN([GUIX_ASSERT_SUPPORTED_SYSTEM], [
  AC_REQUIRE([GUIX_SYSTEM_TYPE])

  AC_ARG_WITH([courage], [AC_HELP_STRING([--with-courage],
    [Assert that even if this platform is unsupported, you will be
courageous and port the GNU System distribution to it (see
"GNU Distribution" in the manual.)])],
    [guix_courageous="$withval"],
    [guix_courageous="no"])

  # Currently only Linux-based systems are supported, and only on some
  # platforms.
  case "$guix_system" in
    x86_64-linux|i686-linux|armhf-linux|aarch64-linux|mips64el-linux)
      ;;
    *)
      if test "x$guix_courageous" = "xyes"; then
        AC_MSG_WARN([building Guix on `$guix_system', which is not supported])
      else
        AC_MSG_ERROR([`$guix_system' is not a supported platform.
See "GNU Distribution" in the manual, or try `--with-courage'.])
      fi
      ;;
  esac
])

dnl GUIX_ASSERT_GUILE_FEATURES FEATURES
dnl
dnl Assert that FEATURES are provided by $GUILE.
AC_DEFUN([GUIX_ASSERT_GUILE_FEATURES], [
  for guix_guile_feature in $1
  do
    AC_MSG_CHECKING([whether $GUILE provides feature '$guix_guile_feature'])
    if "$GUILE" -c "(exit (provided? '$guix_guile_feature))"
    then
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([no])
      AC_MSG_ERROR([$GUILE does not support feature '$guix_guile_feature', which is required.])
    fi
  done
])

dnl GUIX_ASSERT_SYNTAX_OBJECT_EQUAL
dnl
dnl Guile 2.2.1 was a brown-paper-bag release where 'equal?' wouldn't work
dnl for syntax objects, which broke gexps.  Unfortunately Fedora 25 provides it.
dnl Reject it.
AC_DEFUN([GUIX_ASSERT_SYNTAX_OBJECT_EQUAL], [
  AC_CACHE_CHECK([whether 'equal?' works for syntax objects],
    [ac_cv_guix_syntax_object_equal],
    [if "$GUILE" -c '(exit (equal? (syntax x) (syntax x)))'
     then
       ac_cv_guix_syntax_object_equal=yes
     else
       ac_cv_guix_syntax_object_equal=no
     fi])
  if test "x$ac_cv_guix_syntax_object_equal" != xyes; then
    # This bug was present in Guile 2.2.1 only.
    AC_MSG_ERROR(['equal?' does not work for syntax object; upgrade to Guile 2.2.2 or later.])
  fi
])

dnl GUIX_CHECK_GUILE_SSH
dnl
dnl Check whether a recent-enough Guile-SSH is available.
AC_DEFUN([GUIX_CHECK_GUILE_SSH], [
  dnl Check whether 'channel-send-eof' (introduced in 0.10.2) is present.
  AC_CACHE_CHECK([whether Guile-SSH is available and recent enough],
    [guix_cv_have_recent_guile_ssh],
    [GUILE_CHECK([retval],
      [(and (@ (ssh channel) channel-send-eof)
            (@ (ssh popen) open-remote-pipe)
	    (@ (ssh dist node) node-eval))])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_ssh="yes"
     else
       guix_cv_have_recent_guile_ssh="no"
     fi])
])

dnl GUIX_CHECK_GUILE_SQLITE3
dnl
dnl Check whether a recent-enough Guile-Sqlite3 is available.
AC_DEFUN([GUIX_CHECK_GUILE_SQLITE3], [
  dnl Check whether 'sqlite-bind-arguments' is available.  It was introduced
  dnl in February 2018:
  dnl <https://notabug.org/guile-sqlite3/guile-sqlite3/commit/1cd1dec96a9999db48c0ff45bab907efc637247f>.
  AC_CACHE_CHECK([whether Guile-Sqlite3 is available and recent enough],
    [guix_cv_have_recent_guile_sqlite3],
    [GUILE_CHECK([retval],
      [(@ (sqlite3) sqlite-bind-arguments)])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_sqlite3="yes"
     else
       guix_cv_have_recent_guile_sqlite3="no"
     fi])
])

dnl GUIX_CHECK_GUILE_JSON
dnl
dnl Check whether a recent-enough Guile-JSON is available.
AC_DEFUN([GUIX_CHECK_GUILE_JSON], [
  dnl Check whether we're using Guile-JSON 3.x, which uses a JSON-to-Scheme
  dnl mapping different from that of earlier versions.
  AC_CACHE_CHECK([whether Guile-JSON is available and recent enough],
    [guix_cv_have_recent_guile_json],
    [GUILE_CHECK([retval],
      [(use-modules (json) (ice-9 match))
       (match (json-string->scm \"[[] { \\\"a\\\": 42 } []]\")
         (#(("a" . 42)) #t)
	 (_ #f))])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_json="yes"
     else
       guix_cv_have_recent_guile_json="no"
     fi])
])


dnl GUIX_TEST_ROOT_DIRECTORY
AC_DEFUN([GUIX_TEST_ROOT_DIRECTORY], [
  AC_CACHE_CHECK([for unit test root directory],
    [ac_cv_guix_test_root],
    [ac_cv_guix_test_root="`pwd`/test-tmp"])
])

dnl 'BINPRM_BUF_SIZE' constant in Linux (we leave room for the trailing zero.)
dnl The Hurd has a limit of about a page (see exec/hashexec.c.)
m4_define([LINUX_HASH_BANG_LIMIT], 127)

dnl Hardcoded 'sun_path' length in <sys/un.h>.
m4_define([SOCKET_FILE_NAME_LIMIT], 108)

dnl GUIX_SOCKET_FILE_NAME_LENGTH
AC_DEFUN([GUIX_SOCKET_FILE_NAME_LENGTH], [
  AC_CACHE_CHECK([the length of the installed socket file name],
    [ac_cv_guix_socket_file_name_length],
    [ac_cv_guix_socket_file_name_length="`echo -n "$guix_localstatedir/guix/daemon-socket/socket" | wc -c`"])
])

dnl GUIX_TEST_SOCKET_FILE_NAME_LENGTH
AC_DEFUN([GUIX_TEST_SOCKET_FILE_NAME_LENGTH], [
  AC_REQUIRE([GUIX_TEST_ROOT_DIRECTORY])
  AC_CACHE_CHECK([the length of the socket file name used in tests],
    [ac_cv_guix_test_socket_file_name_length],
    [ac_cv_guix_test_socket_file_name_length="`echo -n "$ac_cv_guix_test_root/var/123456/daemon-socket/socket" | wc -c`"])
])

dnl GUIX_HASH_BANG_LENGTH
AC_DEFUN([GUIX_HASH_BANG_LENGTH], [
  AC_CACHE_CHECK([the length of a typical hash bang line],
    [ac_cv_guix_hash_bang_length],
    [ac_cv_guix_hash_bang_length=`echo -n "$storedir/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bootstrap-binaries-0/bin/bash" | wc -c`])
])

dnl GUIX_TEST_HASH_BANG_LENGTH
AC_DEFUN([GUIX_TEST_HASH_BANG_LENGTH], [
  AC_REQUIRE([GUIX_TEST_ROOT_DIRECTORY])
  AC_CACHE_CHECK([the length of a hash bang line used in tests],
    [ac_cv_guix_test_hash_bang_length],
    [ac_cv_guix_test_hash_bang_length=`echo -n "$ac_cv_guix_test_root/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bootstrap-binaries-0/bin/bash" | wc -c`])
])

dnl GUIX_CHECK_FILE_NAME_LIMITS
dnl
dnl GNU/Linux has a couple of silly limits that we can easily run into.
dnl Make sure everything is fine with the current settings.  Set $1 to
dnl 'yes' if tests can run, 'no' otherwise.
AC_DEFUN([GUIX_CHECK_FILE_NAME_LIMITS], [
  AC_REQUIRE([GUIX_SOCKET_FILE_NAME_LENGTH])
  AC_REQUIRE([GUIX_TEST_SOCKET_FILE_NAME_LENGTH])
  AC_REQUIRE([GUIX_HASH_BANG_LENGTH])
  AC_REQUIRE([GUIX_TEST_HASH_BANG_LENGTH])

  if test "$ac_cv_guix_socket_file_name_length" -ge ]SOCKET_FILE_NAME_LIMIT[; then
    AC_MSG_ERROR([socket file name would exceed the maxium allowed length])
  fi
  if test "$ac_cv_guix_test_socket_file_name_length" -ge ]SOCKET_FILE_NAME_LIMIT[; then
    AC_MSG_WARN([socket file name limit may be exceeded when running tests])
  fi

  $1=yes
  if test "$ac_cv_guix_hash_bang_length" -ge ]LINUX_HASH_BANG_LIMIT[; then
    $1=no
    AC_MSG_ERROR([store directory '$storedir' would lead to overly long hash-bang lines])
  fi
  if test "$ac_cv_guix_test_hash_bang_length" -ge ]LINUX_HASH_BANG_LIMIT[; then
    $1=no
    AC_MSG_WARN([test directory '$ac_cv_guix_test_root' may lead to overly long hash-bang lines])
  fi
])

dnl GUIX_CHECK_CXX11
dnl
dnl Check whether the C++ compiler can compile a typical C++11 program.
AC_DEFUN([GUIX_CHECK_CXX11], [
  AC_REQUIRE([AC_PROG_CXX])
  AC_CACHE_CHECK([whether $CXX supports C++11],
    [ac_cv_guix_cxx11_support],
    [save_CXXFLAGS="$CXXFLAGS"
     CXXFLAGS="-std=c++11 $CXXFLAGS"
     AC_COMPILE_IFELSE([
      AC_LANG_SOURCE([
	#include <functional>

	std::function<int(int)>
	return_plus_lambda (int x)
	{
	  auto result = [[&]](int y) {
	    return x + y;
	  };

	  return result;
	}
      ])],
      [ac_cv_guix_cxx11_support=yes],
      [ac_cv_guix_cxx11_support=no])
    CXXFLAGS="$save_CXXFLAGS"
  ])
])

dnl GUIX_ASSERT_CXX11
dnl
dnl Error out if the C++ compiler cannot compile C++11 code.
AC_DEFUN([GUIX_ASSERT_CXX11], [
  GUIX_CHECK_CXX11
  if test "x$ac_cv_guix_cxx11_support" != "xyes"; then
    AC_MSG_ERROR([C++ compiler '$CXX' does not support the C++11 standard])
  fi
])

dnl GUIX_LIBGCRYPT_LIBDIR VAR
dnl
dnl Attempt to determine libgcrypt's LIBDIR; store the result in VAR.
AC_DEFUN([GUIX_LIBGCRYPT_LIBDIR], [
  AC_PATH_PROG([LIBGCRYPT_CONFIG], [libgcrypt-config])
  AC_CACHE_CHECK([libgcrypt's library directory],
    [guix_cv_libgcrypt_libdir],
    [if test "x$LIBGCRYPT_CONFIG" != "x"; then
       guix_cv_libgcrypt_libdir=`$LIBGCRYPT_CONFIG --libs | grep -e -L | sed -e "s/.*-L\([[^ ]]\+\)[[[:blank:]]]\+-lgcrypt.*/\1/g"`
     else
       guix_cv_libgcrypt_libdir=""
     fi])
  $1="$guix_cv_libgcrypt_libdir"
])

dnl GUIX_LIBZ_LIBDIR VAR
dnl
dnl Attempt to determine libz's LIBDIR; store the result in VAR.
AC_DEFUN([GUIX_LIBZ_LIBDIR], [
  AC_REQUIRE([PKG_PROG_PKG_CONFIG])
  AC_CACHE_CHECK([zlib's library directory],
    [guix_cv_libz_libdir],
    [guix_cv_libz_libdir="`$PKG_CONFIG zlib --variable=libdir 2> /dev/null`"])
  $1="$guix_cv_libz_libdir"
])

dnl GUIX_LIBLZ_FILE_NAME VAR
dnl
dnl Attempt to determine liblz's absolute file name; store the result in VAR.
AC_DEFUN([GUIX_LIBLZ_FILE_NAME], [
  AC_REQUIRE([PKG_PROG_PKG_CONFIG])
  AC_CACHE_CHECK([lzlib's file name],
    [guix_cv_liblz_libdir],
    [old_LIBS="$LIBS"
     LIBS="-llz"
     AC_LINK_IFELSE([AC_LANG_SOURCE([int main () { return LZ_decompress_open(); }])],
       [guix_cv_liblz_libdir="`ldd conftest$EXEEXT | grep liblz | sed '-es/.*=> \(.*\) .*$/\1/g'`"])
     LIBS="$old_LIBS"])
  $1="$guix_cv_liblz_libdir"
])

dnl GUIX_CURRENT_LOCALSTATEDIR
dnl
dnl Determine the localstatedir of an existing Guix installation and set
dnl 'guix_cv_current_localstatedir' accordingly.  Set it to "none" if no
dnl existing installation was found.
AC_DEFUN([GUIX_CURRENT_LOCALSTATEDIR], [
  AC_PATH_PROG([GUILE], [guile])
  AC_CACHE_CHECK([the current installation's localstatedir],
    [guix_cv_current_localstatedir],
    [dnl Call 'dirname' because (guix config) appends "/guix" to LOCALSTATEDIR.
     guix_cv_current_localstatedir="`"$GUILE" \
       -c '(use-modules (guix config))
           (when (string=? %store-directory "'$storedir'")
             (display (dirname %state-directory)))' \
       2>/dev/null`"
     if test "x$guix_cv_current_localstatedir" = "x"; then
       guix_cv_current_localstatedir=none
     fi])])

dnl GUIX_CHECK_LOCALSTATEDIR
dnl
dnl Check that the LOCALSTATEDIR value is consistent with that of the existing
dnl Guix installation, if any.  Error out or warn if they do not match.
AC_DEFUN([GUIX_CHECK_LOCALSTATEDIR], [
  AC_REQUIRE([GUIX_CURRENT_LOCALSTATEDIR])
  if test "x$guix_cv_current_localstatedir" != "xnone"; then
    if test "$guix_cv_current_localstatedir" != "$guix_localstatedir"; then
      case "$localstatedir" in
        NONE|\${prefix}*)
          # User kept the default value---i.e., did not pass '--localstatedir'.
          AC_MSG_ERROR([chosen localstatedir '$guix_localstatedir' does not match \
that of the existing installation '$guix_cv_current_localstatedir'
Installing may corrupt $storedir!
Use './configure --localstatedir=$guix_cv_current_localstatedir'.])
          ;;
        *)
          # User passed an explicit '--localstatedir'.  Assume they know what
          # they're doing.
          AC_MSG_WARN([chosen localstatedir '$guix_localstatedir' does not match \
that of the existing installation '$guix_cv_current_localstatedir'])
          AC_MSG_WARN([installing may corrupt $storedir!])
         ;;
      esac
    fi
  fi])