summaryrefslogtreecommitdiff
path: root/gnu/packages/julia.scm
blob: 43254f25fdc79463a13ce3f07e948afbc9395a71 (about) (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
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; 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 packages julia)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix git-download)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages base)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages libevent)
  #:use-module (gnu packages libunwind)
  #:use-module (gnu packages maths)
  #:use-module (gnu packages multiprecision) ; mpfr
  #:use-module (gnu packages pcre)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages python-xyz)
  #:use-module (gnu packages textutils)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages version-control)
  #:use-module (gnu packages wget)
  #:use-module (ice-9 match))

(define libuv-julia
  (let ((commit "26dbe5672c33fc885462c509fe2a9b36f35866fd")
        (revision "6"))
    ;; When upgrading Julia, also upgrade this.
    ;; Get the commit from https://github.com/JuliaLang/julia/blob/v1.1.1/deps/libuv.version
    (package
      (inherit libuv)
      (name "libuv-julia")
      (version (string-append "1.9.0-" revision "." (string-take commit 8)))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/JuliaLang/libuv.git")
                      (commit commit)))
                (file-name (string-append name "-" version "-checkout"))
                (sha256
                 (base32
                  "17pn2xmqaramilx897s9grs966i5246gi6sric5alch4g9j4685n"))))
      (build-system gnu-build-system)
      (arguments
       (substitute-keyword-arguments (package-arguments libuv)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'autogen)))))
      (home-page "https://github.com/JuliaLang/libuv"))))

(define (llvm-patch-url version name)
  (string-append "https://raw.githubusercontent.com/JuliaLang/julia/v" version
		 "/deps/patches/" name))

(define (llvm-patch name sha)
  (let ((version "1.1.1"))
    (origin (method url-fetch)
	    (uri (llvm-patch-url version name))
	    (sha256 (base32 sha))
	    (file-name name))))

(define llvm-julia
  (package
    (inherit llvm-6)
    (name "llvm-julia")
    (source (origin
              (method url-fetch)
              (uri "http://releases.llvm.org/6.0.1/llvm-6.0.1.src.tar.xz")
              (sha256
               (base32
                "1qpls3vk85lydi5b4axl0809fv932qgsqgdgrk098567z4jc7mmn"))
              ;; Those patches are inside the Julia source repo.
              ;; They are _not_ Julia specific (https://github.com/julialang/julia#llvm)
              ;; but they are required to build Julia.
              ;; Discussion: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=919628
              (patches
               (list
	        (llvm-patch "llvm-6.0-D44650.patch"
			    "1336q4vqayr94wdcnlmcxh90mjdh34dzw9x2cbiqjnx9b1j8fxyb")
	        (llvm-patch "llvm-6.0-DISABLE_ABI_CHECKS.patch"
			    "014fawd1ba7yckalypfld22zgic87x9nx3cim42zrwygywd36pyg")
	        (llvm-patch "llvm-6.0-NVPTX-addrspaces.patch"
			    "1qdi2zmrjsrj0h84zv2vyly2hjcn4f67mfy0s1q353g4v4jkscqc")
	        (llvm-patch "llvm-6.0.0_D27296-libssp.patch"
			    "0s5hi2r1j63i8m6ig1346crx2aiv9f7rgb3mg80kw1wx5y7pdpfh")
	        (llvm-patch "llvm-D27629-AArch64-large_model_6.0.1.patch"
			    "1qrshmlqvnasdyc158vfn3hnbigqph3lsq7acb9w8lwkpnnm2j4z")
	        (llvm-patch "llvm-D34078-vectorize-fdiv.patch"
			    "1696hg84a0jxcnggvqsc2cdp271hf9a44p4qsd078qm1mfawkaay")
	        (llvm-patch "llvm-D42262-jumpthreading-not-i1.patch"
			    "1c8w210gwidbnkkw8anp17dk5pnxws2fl3mb2qxh7y9wzfpixgaq")
	        (llvm-patch "llvm-D44892-Perf-integration.patch"
			    "0r37jd0ssh2k1pndkfd5blgpg9z90im4vlzprhb0n0wwz45g4b05")
	        (llvm-patch "llvm-D46460.patch"
			    "1miqgswdc0qvbaf4571c2xkxyp9ais06b1bcpa83sq22vr4hbsfb")
	        (llvm-patch "llvm-D49832-SCEVPred.patch"
			    "0v5c88hgqj6dymv3j86ca5mhpqab5fbnrvjiw1nvnrnya9l4dlbn")
	        (llvm-patch "llvm-D50010-VNCoercion-ni.patch"
			    "0iblb3q1xixwrb12jpb89h3ywmqmzdp6aqp416j4ncwakyjhhfkp")
	        (llvm-patch "llvm-D50167-scev-umin.patch"
			    "1f2rakcnnyhr7w10k7gqg0k0491pyvx5ijplivw557f714ys3q6v")
	        (llvm-patch "llvm-OProfile-line-num.patch"
			    "1jvbbmwyags0xfwamb13qrf3rgcz9i1r03m9lava7swag8xb78c7")
	        (llvm-patch "llvm-PPC-addrspaces.patch"
			    "1f23nhsxh2s3jskbgs7da9nwg3s1hrkbk5aahl08x41wi3mny01p")
	        (llvm-patch "llvm-rL323946-LSRTy.patch"
			    "10cz3vy1yw0w643z7xx021wa4kymx9fcm3bjg61s6vzdqd6d9fns")
	        (llvm-patch "llvm-rL326967-aligned-load.patch"
			    "04jxnv32yj5x17hqhi8g2p8rhgp38gmjzr871w7z8s44pq10v9v4")
	        (llvm-patch "llvm-rL327898.patch"
			    "15ah49gbsll23z28kpyahi5vl0fh3fkxcgd1zmxxdcl96s3x8bnq")))))
    (arguments
     (substitute-keyword-arguments (package-arguments llvm-6)
       ((#:configure-flags flags)
        `(list ;; Taken from NixOS. Only way I could get libLLVM-6.0.so
	  "-DCMAKE_BUILD_TYPE=Release"

          ;; Build a native compiler and the NVPTX backend (NVIDIA) since
          ;; Julia insists on it, nothing more.  This reduces build times and
          ;; disk usage.
          ,(string-append "-DLLVM_TARGETS_TO_BUILD=" (system->llvm-target))
          "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=NVPTX"

	  "-DLLVM_INSTALL_UTILS=ON"
	  "-DLLVM_BUILD_TESTS=ON"
	  "-DLLVM_ENABLE_FFI=ON"
	  "-DLLVM_ENABLE_RTTI=ON"
          ;; "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
          ;; "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
	  ;; "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
	  "-DLLVM_ENABLE_DUMP=ON"
	  "-DLLVM_LINK_LLVM_DYLIB=ON"))))))

(define-public julia
  (package
    (name "julia")
    (version "1.1.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/JuliaLang/julia/releases/download/v"
                    version "/julia-" version ".tar.gz"))
              (sha256
               (base32
                "0hk983mywimclgnjc41zmlppm5kfdz2aj85ky07p49ilcqxi998f"))))
    (build-system gnu-build-system)
    (arguments
     `(#:test-target "test"
       #:modules ((ice-9 match)
                  (guix build gnu-build-system)
                  (guix build utils))

       ;; Do not strip binaries to keep support for full backtraces.
       ;; See https://github.com/JuliaLang/julia/issues/17831
       #:strip-binaries? #f

       ;; The DSOs use $ORIGIN to refer to each other, but (guix build
       ;; gremlin) doesn't support it yet, so skip this phase.
       #:validate-runpath? #f

       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (add-after 'unpack 'prepare-deps
           (lambda* (#:key inputs #:allow-other-keys)
             (mkdir "deps/srccache")
             (copy-file (assoc-ref inputs "dsfmt")
                        "deps/srccache/dsfmt-2.2.3.tar.gz")
             (copy-file (assoc-ref inputs "objconv")
                        "deps/srccache/objconv.zip")
             (copy-file (assoc-ref inputs "suitesparse")
                        "deps/srccache/SuiteSparse-4.4.5.tar.gz")
             (copy-file (string-append (assoc-ref inputs "virtualenv")
                                       "/bin/virtualenv")
                        "julia-env")
             (copy-file (assoc-ref inputs "libwhich")
                        (string-append "deps/srccache/libwhich-"
                                       "81e9723c0273d78493dc8c8ed570f68d9ce7e89e"
                                       ".tar.gz"))
             (copy-file (assoc-ref inputs "rmath")
                        "deps/srccache/Rmath-julia-0.1.tar.gz")

	     ;; needed by libwhich
	     (setenv "LD_LIBRARY_PATH"
		     (string-join (map (lambda (pkg)
                                         (string-append (assoc-ref inputs pkg)
                                                        "/lib"))
                                       '("arpack-ng" "fftw" "gmp" "lapack"
			                 "libgit2" "mpfr" "openblas" "openlibm"
			                 "openspecfun" "pcre2"))
                                  ":"))
	     #t))
         ;; FIXME: Building the documentation requires Julia packages that
         ;; would be downloaded from the Internet.  We should build them in a
         ;; separate build phase.
         (add-after 'unpack 'disable-documentation
           (lambda _
             (substitute* "Makefile"
               (("(install: .*) \\$\\(BUILDROOT\\)/doc/_build/html/en/index.html" _ line)
                (string-append line "\n"))
               (("src ui doc deps")
                "src ui deps"))
             #t))
         (add-before 'check 'set-home
           ;; Some tests require a home directory to be set.
           (lambda _ (setenv "HOME" "/tmp") #t))
         (add-after 'unpack 'hardcode-soname-map
          ;; ./src/runtime_ccall.cpp creates a map from library names to paths
          ;; using the output of "/sbin/ldconfig -p".  Since ldconfig is not
          ;; used in Guix, we patch runtime_ccall.cpp to contain a static map.
          (lambda* (#:key inputs #:allow-other-keys)
            (use-modules (ice-9 match))
            (substitute* "src/runtime_ccall.cpp"
              ;; Patch out invocations of '/sbin/ldconfig' to avoid getting
              ;; error messages about missing '/sbin/ldconfig' on Guix System.
              (("popen\\(.*ldconfig.*\\);")
               "NULL;\n")

              ;; Populate 'sonameMap'.
              (("jl_read_sonames.*;")
               (string-join
                (map (match-lambda
                       ((input libname soname)
                        (string-append
                         "sonameMap[\"" libname "\"] = "
                         "\"" (assoc-ref inputs input) "/lib/" soname "\";")))
                     '(("libc"        "libc"           "libc.so.6")
                       ("pcre2"       "libpcre2-8"     "libpcre2-8.so")
                       ("mpfr"        "libmpfr"        "libmpfr.so")
                       ("openblas"    "libblas"        "libopenblas.so")
                       ("arpack-ng"   "libarpack"      "libarpack.so")
                       ("lapack"      "liblapack"      "liblapack.so")
                       ("libgit2"     "libgit2"        "libgit2.so")
                       ("gmp"         "libgmp"         "libgmp.so")
                       ("openspecfun" "libopenspecfun" "libopenspecfun.so")
                       ("fftw"        "libfftw3"       "libfftw3_threads.so")
                       ("fftwf"       "libfftw3f"      "libfftw3f_threads.so"))))))
            (substitute* "base/math.jl"
              (("const libm = Base.libm_name")
               (string-append "const libm = \""
                              (assoc-ref inputs "openlibm")
                              "/lib/libopenlibm.so"
                              "\""))
              (("const openspecfun = \"libopenspecfun\"")
               (string-append "const openspecfun = \""
                              (assoc-ref inputs "openspecfun")
                              "/lib/libopenspecfun.so"
                              "\"")))
            #t))
         (add-before 'build 'fix-include-and-link-paths
          (lambda* (#:key inputs #:allow-other-keys)
            ;; LIBUTF8PROC is a linker flag, not a build target.  It is
            ;; included in the LIBFILES_* variable which is used as a
            ;; collection of build targets and a list of libraries to link
            ;; against.
            (substitute* "src/flisp/Makefile"
              (("\\$\\(BUILDDIR\\)/\\$\\(EXENAME\\): \\$\\(OBJS\\) \\$\\(LIBFILES_release\\)")
               "$(BUILDDIR)/$(EXENAME): $(OBJS) $(LLT_release)")
              (("\\$\\(BUILDDIR\\)/\\$\\(EXENAME\\)-debug: \\$\\(DOBJS\\) \\$\\(LIBFILES_debug\\)")
               "$(BUILDDIR)/$(EXENAME)-debug: $(DOBJS) $(LLT_debug)"))

            ;; The REPL must be linked with libuv.
            (substitute* "ui/Makefile"
              (("JLDFLAGS \\+= ")
               (string-append "JLDFLAGS += "
                              (assoc-ref %build-inputs "libuv")
                              "/lib/libuv.so ")))

            (substitute* "base/Makefile"
              (("\\$\\(build_includedir\\)/uv/errno.h")
               (string-append (assoc-ref inputs "libuv")
                              "/include/uv/errno.h")))
            #t))
         (add-before 'build 'replace-default-shell
          (lambda _
            (substitute* "base/client.jl"
              (("/bin/sh") (which "sh")))
            #t))
         (add-after 'unpack 'hardcode-paths
           (lambda _
             (substitute* "stdlib/InteractiveUtils/src/InteractiveUtils.jl"
               (("`which") (string-append "`" (which "which")))
               (("`wget")  (string-append "`" (which "wget"))))
             #t))
         (add-before 'check 'disable-broken-tests
           (lambda _
             (define (touch file-name)
               (call-with-output-file file-name (const #t)))
	     ;; FIXME: All git tests works except this one. But *THIS* "fix"
             ;; is not working, so right now I'm disabling all libgit2.jl tests
	     ;; (substitute* "stdlib/LibGit2/test/libgit2.jl"
	     ;; (("!LibGit2.use_http_path(cfg, github_cred)") "true")
	     ;; (("LibGit2.use_http_path(cfg, mygit_cred)") "true"))
             (map (lambda (test)
                    (delete-file test)
                    (touch test))
	          '("stdlib/Sockets/test/runtests.jl"
		    "stdlib/Distributed/test/runtests.jl"
                    ;; FIXME: see above
		    "stdlib/LibGit2/test/libgit2.jl"))
	     (substitute* "test/choosetests.jl"
	       ;; These tests fail, probably because some of the input
	       ;; binaries have been stripped and thus backtraces don't look
	       ;; as expected.
	       (("\"backtrace\",") "")
	       (("\"cmdlineargs\",") ""))
	     #t)))
       #:make-flags
       (list
        (string-append "prefix=" (assoc-ref %outputs "out"))
        (string-append "PREFIX=" (assoc-ref %outputs "out"))

        ;; Passing the MARCH flag is necessary to build binary substitutes for
        ;; the supported architectures.
        ,(match (or (%current-target-system)
                    (%current-system))
           ("x86_64-linux" "MARCH=x86-64")
           ("i686-linux" "MARCH=pentium4")
           ("aarch64-linux" "MARCH=armv8-a")
           ;; Prevent errors when querying this package on unsupported
           ;; platforms, e.g. when running "guix package --search="
           (_ "MARCH=UNSUPPORTED"))

        "CONFIG_SHELL=bash"     ;needed to build bundled libraries
        "USE_SYSTEM_DSFMT=0"    ;not packaged for Guix and upstream has no
                                ;build system for a shared library.
        "USE_SYSTEM_LAPACK=1"
        "USE_SYSTEM_BLAS=1"
        "USE_BLAS64=0"          ;needed when USE_SYSTEM_BLAS=1
        "LIBBLAS=-lopenblas"
        "LIBBLASNAME=libopenblas"

        "USE_SYSTEM_FFTW=1"
        "LIBFFTWNAME=libfftw3"
        "LIBFFTWFNAME=libfftw3f"

        ;; TODO: Suitesparse does not install shared libraries, so we cannot
        ;; use the suitesparse package.
        ;; "USE_SYSTEM_SUITESPARSE=1"
        ;; (string-append "SUITESPARSE_INC=-I "
        ;;                (assoc-ref %build-inputs "suitesparse")
        ;;                "/include")

        "USE_GPL_LIBS=1"        ;proudly
        "USE_SYSTEM_UTF8PROC=1"
        (string-append "UTF8PROC_INC="
                       (assoc-ref %build-inputs "utf8proc")
                       "/include")
        "USE_SYSTEM_LLVM=1"
	"LLVM_VER=6.0.1"

	"USE_LLVM_SHLIB=1"
	"USE_SYSTEM_LIBUNWIND=1"
	"USE_SYSTEM_LIBUV=1"
	(string-append "LIBUV="
		       (assoc-ref %build-inputs "libuv")
		       "/lib/libuv.so")
	(string-append "LIBUV_INC="
		       (assoc-ref %build-inputs "libuv")
		       "/include")
	"USE_SYSTEM_PATCHELF=1"
	"USE_SYSTEM_PCRE=1"
	"USE_SYSTEM_OPENLIBM=1"

	"USE_SYSTEM_GMP=1"
	"USE_SYSTEM_MPFR=1"
	"USE_SYSTEM_ARPACK=1"
	"USE_SYSTEM_LIBGIT2=1"
	"USE_SYSTEM_ZLIB=1"
	"USE_SYSTEM_OPENSPECFUN=1")))
    (inputs
     `(("llvm" ,llvm-julia)

       ;; The bundled version is 3.3.0 so stick to that version.  With other
       ;; versions, we get test failures in 'linalg/arnoldi' as described in
       ;; <https://bugs.gnu.org/30282>.
       ("arpack-ng" ,arpack-ng-3.3.0)

       ("coreutils" ,coreutils) ;for bindings to "mkdir" and the like
       ("lapack" ,lapack)
       ("openblas" ,openblas) ;Julia does not build with Atlas
       ("libunwind" ,libunwind)
       ("openlibm" ,openlibm)
       ("openspecfun" ,openspecfun)
       ("libgit2" ,libgit2)
       ("fftw" ,fftw)
       ("fftwf" ,fftwf)
       ("fortran" ,gfortran)
       ("libuv" ,libuv-julia)
       ("pcre2" ,pcre2)
       ("utf8proc" ,utf8proc)
       ("mpfr" ,mpfr)
       ("wget" ,wget)
       ("which" ,which)
       ("zlib" ,zlib)
       ("gmp" ,gmp)
       ("virtualenv" ,python2-virtualenv)
       ;; FIXME: The following inputs are downloaded from upstream to allow us
       ;; to use the lightweight Julia release tarball.  Ideally, these inputs
       ;; would eventually be replaced with proper Guix packages.

       ;; TODO: run "make -f contrib/repackage_system_suitesparse4.make" to copy static lib
       ;; Find dependency versions here:
       ;; https://raw.githubusercontent.com/JuliaLang/julia/77a2c1e245c85812dc1c7687540beedecc52758f/deps/Versions.make
       ("rmath"
	,(origin
	   (method git-fetch)
	   (uri (git-reference
                 (url "https://github.com/JuliaLang/Rmath-julia")
                 (commit "v0.1")))
           (file-name "rmath-julia-0.1-checkout")
	   (sha256
	    (base32
	     "1zkpy0cg5zivq40zbhbdgj9128fqzs2j94wkwih8nc6xaj3gp9p6"))))
       ("suitesparse"
        ,(origin
           (method url-fetch)
           (uri "http://faculty.cse.tamu.edu/davis/SuiteSparse/SuiteSparse-4.4.5.tar.gz")
           (sha256
            (base32
             "1jcbxb8jx5wlcixzf6n5dca2rcfx6mlcms1k2rl5gp67ay3bix43"))))
       ("objconv"
        ,(origin
           (method url-fetch)
           ;; No versioned URL, see <https://www.agner.org/optimize/> for updates.
           (uri "https://www.agner.org/optimize/objconv.zip")
           (file-name "objconv-2018-10-07.zip")
           (sha256
            (base32
             "0wp6ld9vk11f4nnkn56627zmlv9k5vafi99qa3yyn1pgcd61zcfs"))))
       ("libwhich"
	,(let ((commit "81e9723c0273d78493dc8c8ed570f68d9ce7e89e"))
           (origin
             ;; Note: We use a /tarball URL, but that's because Julia's build
             ;; system checks the hash of that tarball; thus we can't use
             ;; 'git-fetch'.
	     (method url-fetch)
	     (uri (string-append
                   "https://api.github.com/repos/vtjnash/libwhich/tarball/"
                   commit))
             (file-name (string-append "libwhich-" (string-take commit 7)
                                       ".tar.gz"))
	     (sha256
	      (base32
	       "1p7zg31kpmpbmh1znrk1xrbd074agx13b9q4dcw8n2zrwwdlbz3b")))))
       ("dsfmt"
        ,(origin
           (method url-fetch)
           (uri (string-append
                 "http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/"
                 "SFMT/dSFMT-src-2.2.3.tar.gz"))
           (sha256
            (base32
             "03kaqbjbi6viz0n33dk5jlf6ayxqlsq4804n7kwkndiga9s4hd42"))))))
    (native-inputs
     `(("openssl" ,openssl)
       ("perl" ,perl)
       ("patchelf" ,patchelf)
       ("pkg-config" ,pkg-config)
       ("python" ,python-2)))
    ;; Julia is not officially released for ARM and MIPS.
    ;; See https://github.com/JuliaLang/julia/issues/10639
    (supported-systems '("i686-linux" "x86_64-linux" "aarch64-linux"))
    (home-page "https://julialang.org/")
    (synopsis "High-performance dynamic language for technical computing")
    (description
     "Julia is a high-level, high-performance dynamic programming language for
technical computing, with syntax that is familiar to users of other technical
computing environments.  It provides a sophisticated compiler, distributed
parallel execution, numerical accuracy, and an extensive mathematical function
library.")
    (license license:expat)))