gnu/packages/mpi.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2014, 2015, 2018, 2019 Eric Bavier <bavier@member.fsf.org>
   3 ;;; Copyright © 2014-2022 Ludovic Courtès <ludo@gnu.org>
   4 ;;; Copyright © 2014 Ian Denhardt <ian@zenhack.net>
   5 ;;; Copyright © 2016 Andreas Enge <andreas@enge.fr>
   6 ;;; Copyright © 2017 Dave Love <fx@gnu.org>
   7 ;;; Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
   8 ;;; Copyright © 2018–2021 Tobias Geerinckx-Rice <me@tobias.gr>
   9 ;;; Copyright © 2018 Paul Garlick <pgarlick@tourbillion-technology.com>
  10 ;;; Copyright © 2019, 2021 Ricardo Wurmus <rekado@elephly.net>
  11 ;;;
  12 ;;; This file is part of GNU Guix.
  13 ;;;
  14 ;;; GNU Guix is free software; you can redistribute it and/or modify it
  15 ;;; under the terms of the GNU General Public License as published by
  16 ;;; the Free Software Foundation; either version 3 of the License, or (at
  17 ;;; your option) any later version.
  18 ;;;
  19 ;;; GNU Guix is distributed in the hope that it will be useful, but
  20 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;;; GNU General Public License for more details.
  23 ;;;
  24 ;;; You should have received a copy of the GNU General Public License
  25 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 (define-module (gnu packages mpi)
  28   #:use-module (guix packages)
  29   #:use-module ((guix licenses) #:prefix license:)
  30   #:use-module (guix download)
  31   #:use-module (guix utils)
  32   #:use-module (guix deprecation)
  33   #:use-module (guix build-system gnu)
  34   #:use-module (guix build-system python)
  35   #:use-module (gnu packages)
  36   #:use-module (gnu packages base)
  37   #:use-module (gnu packages compression)
  38   #:use-module (gnu packages fabric-management)
  39   #:use-module (gnu packages gcc)
  40   #:use-module (gnu packages java)
  41   #:use-module (gnu packages libevent)
  42   #:use-module (gnu packages linux)
  43   #:use-module (gnu packages pciutils)
  44   #:use-module (gnu packages xorg)
  45   #:use-module (gnu packages gtk)
  46   #:use-module (gnu packages xml)
  47   #:use-module (gnu packages perl)
  48   #:use-module (gnu packages ncurses)
  49   #:use-module (gnu packages parallel)
  50   #:use-module (gnu packages pkg-config)
  51   #:use-module (gnu packages valgrind)
  52   #:use-module (srfi srfi-1)
  53   #:use-module (ice-9 match))
  54
  55 (define-public hwloc-1
  56   ;; Note: For now we keep 1.x as the default because many packages have yet
  57   ;; to migrate to 2.0.
  58   (package
  59     (name "hwloc")
  60     (version "1.11.12")
  61     (source (origin
  62               (method url-fetch)
  63               (uri (string-append "https://www.open-mpi.org/software/hwloc/v"
  64                                   (version-major+minor version)
  65                                   "/downloads/hwloc-" version ".tar.bz2"))
  66               (sha256
  67                (base32
  68                 "0za1b9lvrm3rhn0lrxja5f64r0aq1qs4m0pxn1ji2mbi8ndppyyx"))))
  69
  70     (properties
  71      ;; Tell the 'generic-html' updater to monitor this URL for updates.
  72      `((release-monitoring-url
  73         . "https://www-lb.open-mpi.org/software/hwloc/current")))
  74
  75     (build-system gnu-build-system)
  76     (outputs '("out"           ;'lstopo' & co., depends on Cairo, libx11, etc.
  77                "lib"           ;small closure
  78                "doc"           ;400+ section 3 man pages
  79                "debug"))
  80     (inputs
  81      `(("libx11" ,libx11)
  82        ("cairo" ,cairo)
  83        ("ncurses" ,ncurses)
  84        ("expat" ,expat)
  85        ,@(if (not (string-prefix? "armhf"
  86                                   (or (%current-target-system)
  87                                       (%current-system))))
  88              `(("numactl" ,numactl))
  89              '())))
  90     (propagated-inputs
  91      ;; hwloc.pc lists it in 'Requires.private'.
  92      (list libpciaccess))
  93     (native-inputs
  94      (list pkg-config))
  95     (arguments
  96      `(#:configure-flags '("--localstatedir=/var")
  97        #:phases
  98        (modify-phases %standard-phases
  99          (add-before 'check 'skip-linux-libnuma-test
 100            (lambda _
 101              ;; Arrange to skip 'tests/linux-libnuma', which fails on some
 102              ;; machines: <https://github.com/open-mpi/hwloc/issues/213>.
 103              (substitute* "tests/linux-libnuma.c"
 104                (("numa_available\\(\\)")
 105                 "-1"))
 106              #t))
 107          (add-after 'install 'refine-libnuma
 108            ;; Give -L arguments for libraries to avoid propagation
 109            (lambda* (#:key inputs outputs #:allow-other-keys)
 110              (let ((out  (assoc-ref outputs "lib"))
 111                    (numa (assoc-ref inputs "numactl")))
 112                (substitute* (map (lambda (f) (string-append out "/" f))
 113                                  '("lib/pkgconfig/hwloc.pc" "lib/libhwloc.la"))
 114                  (("-lnuma" lib)
 115                   (string-append "-L" numa "/lib " lib))))))
 116          (add-after 'install 'avoid-circular-references
 117            (lambda* (#:key outputs #:allow-other-keys)
 118              (let ((lib (assoc-ref outputs "lib")))
 119                ;; Suppress the 'prefix=' and 'exec_prefix=' lines so that the
 120                ;; "lib" output doesn't refer to "out".
 121                (substitute* (string-append lib "/lib/pkgconfig/hwloc.pc")
 122                  (("^.*prefix=.*$")
 123                   ""))
 124                #t)))
 125          (add-after 'install 'move-man3-pages
 126            (lambda* (#:key outputs #:allow-other-keys)
 127              ;; Move section 3 man pages to the "doc" output.
 128              (let ((out (assoc-ref outputs "out"))
 129                    (doc (assoc-ref outputs "doc")))
 130                (copy-recursively (string-append out "/share/man/man3")
 131                                  (string-append doc "/share/man/man3"))
 132                (delete-file-recursively (string-append out "/share/man/man3"))
 133                #t))))))
 134     (home-page "https://www.open-mpi.org/projects/hwloc/")
 135     (synopsis "Abstraction of hardware architectures")
 136     (description
 137      "hwloc provides a portable abstraction (across OS,
 138 versions, architectures, ...) of the hierarchical topology of modern
 139 architectures, including NUMA memory nodes, sockets, shared caches, cores and
 140 simultaneous multithreading.  It also gathers various attributes such as cache
 141 and memory information.  It primarily aims at helping high-performance
 142 computing applications with gathering information about the hardware so as to
 143 exploit it accordingly and efficiently.
 144
 145 hwloc may display the topology in multiple convenient formats.  It also offers
 146 a powerful programming interface to gather information about the hardware,
 147 bind processes, and much more.")
 148     (license license:bsd-3)))
 149
 150 (define-public hwloc-2
 151   ;; Note: 2.x isn't the default yet, see above.
 152   (package
 153     (inherit hwloc-1)
 154     (version "2.7.0")
 155     (source (origin
 156               (method url-fetch)
 157               (uri (string-append "https://download.open-mpi.org/release/hwloc/v"
 158                                   (version-major+minor version)
 159                                   "/hwloc-" version ".tar.bz2"))
 160               (sha256
 161                (base32
 162                 "1q440fwvhnxz6j8k5bn3bxj86b3lzbr8fgib78l4iq6gxd9yx302"))))
 163
 164     ;; libnuma is no longer needed.
 165     (inputs (alist-delete "numactl" (package-inputs hwloc-1)))
 166     (arguments
 167      (substitute-keyword-arguments (package-arguments hwloc-1)
 168        ((#:phases phases)
 169         `(modify-phases ,phases
 170            (replace 'skip-linux-libnuma-test
 171              (lambda _
 172                ;; Arrange to skip 'tests/hwloc/linux-libnuma', which fails on
 173                ;; some machines: <https://github.com/open-mpi/hwloc/issues/213>.
 174                (substitute* "tests/hwloc/linux-libnuma.c"
 175                  (("numa_available\\(\\)")
 176                   "-1"))
 177                #t))
 178            (add-before 'check 'skip-test-that-fails-on-qemu
 179              (lambda _
 180                ;; Skip test that fails on emulated hardware due to QEMU bug:
 181                ;; <https://bugs.gnu.org/40342>.
 182                (substitute* "tests/hwloc/hwloc_get_last_cpu_location.c"
 183                  (("hwloc_topology_init" all)
 184                   (string-append "exit (77);\n" all)))
 185                #t))))))))
 186
 187 (define-deprecated hwloc-2.0 hwloc-2)
 188
 189 (define-public hwloc
 190   ;; The latest stable series of hwloc.
 191   hwloc-2)
 192
 193 (define-public openmpi
 194   (package
 195     (name "openmpi")
 196     (version "4.1.1")
 197     (source
 198      (origin
 199       (method url-fetch)
 200       (uri (string-append "https://www.open-mpi.org/software/ompi/v"
 201                           (version-major+minor version)
 202                           "/downloads/openmpi-" version ".tar.bz2"))
 203       (sha256
 204        (base32 "1nkwq123vvmggcay48snm9qqmrh0bdzpln0l1jnp26niidvplkz2"))
 205       (patches (search-patches "openmpi-mtl-priorities.patch"))))
 206
 207     (properties
 208      ;; Tell the 'generic-html' updater to monitor this URL for updates.
 209      `((release-monitoring-url
 210         . "https://www.open-mpi.org/software/ompi/current")))
 211
 212     (build-system gnu-build-system)
 213     (inputs
 214      `(("hwloc" ,hwloc-2 "lib")
 215        ("gfortran" ,gfortran)
 216        ("libfabric" ,libfabric)
 217        ("libevent" ,libevent)
 218        ("opensm" ,opensm)
 219        ,@(if (and (not (%current-target-system))
 220                   (member (%current-system) (package-supported-systems psm)))
 221              `(("psm" ,psm))
 222              '())
 223        ,@(if (and (not (%current-target-system))
 224                   (member (%current-system) (package-supported-systems psm2)))
 225              `(("psm2" ,psm2))
 226              '())
 227        ,@(if (and (not (%current-target-system))
 228                   (member (%current-system) (package-supported-systems ucx)))
 229              `(("ucx" ,ucx))
 230              '())
 231        ("rdma-core" ,rdma-core)
 232        ("valgrind" ,valgrind)
 233        ("slurm" ,slurm)))              ;for PMI support (launching via "srun")
 234     (native-inputs
 235      (list pkg-config perl))
 236     (outputs '("out" "debug"))
 237     (arguments
 238      `(#:configure-flags `("--enable-mpi-ext=affinity" ;cr doesn't work
 239                            "--enable-memchecker"
 240                            "--with-sge"
 241                            "--with-valgrind"
 242                            "--with-hwloc=external"
 243                            "--with-libevent"
 244
 245                            ;; Help 'orterun' and 'mpirun' find their tools
 246                            ;; under $prefix by default.
 247                            "--enable-mpirun-prefix-by-default"
 248
 249                            ;; InfiniBand support
 250                            "--enable-openib-control-hdr-padding"
 251                            "--enable-openib-dynamic-sl"
 252                            "--enable-openib-udcm"
 253                            "--enable-openib-rdmacm"
 254                            "--enable-openib-rdmacm-ibaddr"
 255
 256                            ;; Enable support for SLURM's Process Manager
 257                            ;; Interface (PMI).
 258                            ,(string-append "--with-pmi="
 259                                            (assoc-ref %build-inputs "slurm")))
 260        #:phases (modify-phases %standard-phases
 261                   ;; opensm is needed for InfiniBand support.
 262                   (add-after 'unpack 'find-opensm-headers
 263                     (lambda* (#:key inputs #:allow-other-keys)
 264                       (setenv "C_INCLUDE_PATH"
 265                               (search-input-directory inputs
 266                                                       "/include/infiniband"))
 267                       (setenv "CPLUS_INCLUDE_PATH"
 268                               (search-input-directory inputs
 269                                                       "/include/infiniband"))))
 270                   (add-before 'build 'remove-absolute
 271                     (lambda _
 272                       ;; Remove compiler absolute file names (OPAL_FC_ABSOLUTE
 273                       ;; etc.) to reduce the closure size.  See
 274                       ;; <https://lists.gnu.org/archive/html/guix-devel/2017-07/msg00388.html>
 275                       ;; and
 276                       ;; <https://www.mail-archive.com/users@lists.open-mpi.org//msg31397.html>.
 277                       (substitute* '("orte/tools/orte-info/param.c"
 278                                      "oshmem/tools/oshmem_info/param.c"
 279                                      "ompi/tools/ompi_info/param.c")
 280                         (("_ABSOLUTE") ""))
 281                       ;; Avoid valgrind (which pulls in gdb etc.).
 282                       (substitute*
 283                           '("./ompi/mca/io/romio321/src/io_romio321_component.c")
 284                         (("MCA_io_romio321_COMPLETE_CONFIGURE_FLAGS")
 285                          "\"[elided to reduce closure]\""))
 286                       #t))
 287                   (add-before 'build 'scrub-timestamps ;reproducibility
 288                     (lambda _
 289                       (substitute* '("ompi/tools/ompi_info/param.c"
 290                                      "orte/tools/orte-info/param.c"
 291                                      "oshmem/tools/oshmem_info/param.c")
 292                         ((".*(Built|Configured) on.*") ""))
 293                       #t))
 294                   (add-after 'install 'remove-logs ;reproducibility
 295                     (lambda* (#:key outputs #:allow-other-keys)
 296                       (let ((out (assoc-ref outputs "out")))
 297                         (for-each delete-file (find-files out "config.log"))
 298                         #t))))))
 299     (home-page "https://www.open-mpi.org")
 300     (synopsis "MPI-3 implementation")
 301     (description
 302      "The Open MPI Project is an MPI-3 implementation that is developed and
 303 maintained by a consortium of academic, research, and industry partners.  Open
 304 MPI is therefore able to combine the expertise, technologies, and resources
 305 from all across the High Performance Computing community in order to build the
 306 best MPI library available.  Open MPI offers advantages for system and
 307 software vendors, application developers and computer science researchers.")
 308     ;; See file://LICENSE
 309     (license license:bsd-2)))
 310
 311 (define-public openmpi-c++
 312   (package/inherit openmpi
 313     (name "openmpi-c++")
 314     (outputs '("out"))
 315     (arguments
 316      (substitute-keyword-arguments (package-arguments openmpi)
 317        ((#:configure-flags flags)
 318         `(cons "--enable-mpi-cxx" ,flags))))
 319     (synopsis "C++ bindings for MPI")))
 320
 321 ;; TODO: javadoc files contain timestamps.
 322 (define-public java-openmpi
 323   (package/inherit openmpi
 324     (name "java-openmpi")
 325     (inputs
 326      `(("openmpi" ,openmpi)
 327        ,@(package-inputs openmpi)))
 328     (native-inputs
 329      `(("jdk" ,openjdk11 "jdk")
 330        ("zip" ,(@ (gnu packages compression) zip))
 331        ,@(package-native-inputs openmpi)))
 332     (outputs '("out"))
 333     (arguments
 334      `(#:modules ((guix build gnu-build-system)
 335                   ((guix build ant-build-system) #:prefix ant:)
 336                   (guix build utils))
 337        #:imported-modules ((guix build ant-build-system)
 338                            (guix build syscalls)
 339                            ,@%gnu-build-system-modules)
 340        ,@(substitute-keyword-arguments (package-arguments openmpi)
 341            ((#:configure-flags flags)
 342             `(cons "--enable-mpi-java" ,flags))
 343            ((#:make-flags flags ''())
 344             `(append '("-C" "ompi/mpi/java")
 345                      ,flags))
 346            ((#:phases phases)
 347             `(modify-phases ,phases
 348                ;; We could provide the location of the JDK in the configure
 349                ;; flags, but since the configure flags are embedded in the
 350                ;; info binaries that would leave a reference to the JDK in
 351                ;; the "out" output.  To avoid this we set JAVA_HOME.
 352                (add-after 'unpack 'set-JAVA_HOME
 353                  (lambda* (#:key inputs #:allow-other-keys)
 354                    (setenv "JAVA_HOME" (assoc-ref inputs "jdk"))
 355                    #t))
 356                (add-after 'unpack 'link-with-existing-mpi-libraries
 357                  (lambda* (#:key inputs #:allow-other-keys)
 358                    (substitute* "ompi/mpi/java/c/Makefile.in"
 359                      (("\\$\\(top_builddir\\)/ompi/lib@OMPI_LIBMPI_NAME@.la")
 360                       (search-input-file inputs "/lib/libmpi.la")))))
 361                (add-after 'install 'strip-jar-timestamps
 362                  (assoc-ref ant:%standard-phases 'strip-jar-timestamps)))))))
 363     (synopsis "Java bindings for MPI")))
 364
 365 (define-public openmpi-thread-multiple
 366   (package/inherit openmpi
 367     (name "openmpi-thread-multiple")
 368     (arguments
 369      (substitute-keyword-arguments (package-arguments openmpi)
 370        ((#:configure-flags flags)
 371         `(cons "--enable-mpi-thread-multiple" ,flags))))
 372     (description " This version of Open@tie{}MPI has an implementation of
 373 @code{MPI_Init_thread} that provides @code{MPI_THREAD_MULTIPLE}.  This won't
 374 work correctly with all transports (such as @code{openib}), and the
 375 performance is generally worse than the vanilla @code{openmpi} package, which
 376 only provides @code{MPI_THREAD_FUNNELED}.")))
 377
 378 ;;; Build phase to be used for packages that execute MPI code.
 379 (define-public %openmpi-setup
 380   '(lambda _
 381      ;; By default, running the test suite would fail because 'ssh' could not
 382      ;; be found in $PATH.  Define this variable to placate Open MPI without
 383      ;; adding a dependency on OpenSSH (the agent isn't used anyway.)
 384      (setenv "OMPI_MCA_plm_rsh_agent" (which "false"))
 385      ;; Allow oversubscription in case there are less physical cores available
 386      ;; in the build environment than the package wants while testing.
 387      (setenv "OMPI_MCA_rmaps_base_mapping_policy" "core:OVERSUBSCRIBE")
 388
 389      ;; UCX sometimes outputs uninteresting warnings such as:
 390      ;;
 391      ;;   mpool.c:38   UCX  WARN  object 0x7ffff44fffc0 was not returned to mpool ucp_am_bufs
 392      ;;
 393      ;; These in turn leads to failures of test suites that capture and
 394      ;; compare stdout, such as that of 'hdf5-parallel-openmpi'.  Thus, tell
 395      ;; UCX to not emit those warnings.
 396      (setenv "UCX_LOG_LEVEL" "error")
 397      #t))
 398
 399 (define-public python-mpi4py
 400   (package
 401     (name "python-mpi4py")
 402     (version "3.0.3")
 403     (source
 404      (origin
 405        (method url-fetch)
 406        (uri (pypi-uri "mpi4py" version))
 407        (sha256
 408         (base32 "07ssbhssv27rrjx1c5vd3vsr31vay5d8xcf4zh9yblcyidn72b81"))))
 409     (build-system python-build-system)
 410     (arguments
 411      `(#:phases
 412        (modify-phases %standard-phases
 413          (add-after 'build 'mpi-setup
 414            ,%openmpi-setup)
 415          (add-before 'check 'pre-check
 416            (lambda _
 417              ;; Skip BaseTestSpawn class (causes error 'ompi_dpm_dyn_init()
 418              ;; failed --> Returned "Unreachable"' in chroot environment).
 419              (substitute* "test/test_spawn.py"
 420                (("unittest.skipMPI\\('openmpi\\(<3.0.0\\)'\\)")
 421                 "unittest.skipMPI('openmpi')"))
 422              #t)))))
 423     (inputs
 424      (list openmpi))
 425     (home-page "https://bitbucket.org/mpi4py/mpi4py/")
 426     (synopsis "Python bindings for the Message Passing Interface standard")
 427     (description "MPI for Python (mpi4py) provides bindings of the Message
 428 Passing Interface (MPI) standard for the Python programming language, allowing
 429 any Python program to exploit multiple processors.
 430
 431 mpi4py is constructed on top of the MPI-1/MPI-2 specification and provides an
 432 object oriented interface which closely follows MPI-2 C++ bindings.  It
 433 supports point-to-point and collective communications of any picklable Python
 434 object as well as optimized communications of Python objects (such as NumPy
 435 arrays) that expose a buffer interface.")
 436     (license license:bsd-3)))
 437
 438 (define-public mpich
 439   (package
 440     (name "mpich")
 441     (version "3.3.2")
 442     (source (origin
 443               (method url-fetch)
 444               (uri (string-append "http://www.mpich.org/static/downloads/"
 445                                   version "/mpich-" version ".tar.gz"))
 446               (sha256
 447                (base32
 448                 "1farz5zfx4cd0c3a0wb9pgfypzw0xxql1j1294z1sxslga1ziyjb"))))
 449     (build-system gnu-build-system)
 450     (inputs
 451      `(,zlib
 452        (,hwloc-2 "lib")
 453        ,slurm
 454        ,@(if (and (not (%current-target-system))
 455                   (member (%current-system) (package-supported-systems ucx)))
 456              (list ucx)
 457              '())))
 458     (native-inputs
 459      (list perl which gfortran))
 460     (outputs '("out" "debug"))
 461     (arguments
 462      `(#:configure-flags
 463        (list "--disable-silent-rules"             ;let's see what's happening
 464              "--enable-debuginfo"
 465
 466              ;; Default to "ch4", as will be the case in 3.4.  It also works
 467              ;; around issues when running test suites of packages that use
 468              ;; MPICH: <https://issues.guix.gnu.org/39588#15>.
 469              "--with-device=ch4:ucx" ; --with-device=ch4:ofi segfaults in tests
 470
 471              (string-append "--with-hwloc-prefix="
 472                             (assoc-ref %build-inputs "hwloc"))
 473
 474              ,@(if (assoc "ucx" (package-inputs this-package))
 475                    `((string-append "--with-ucx="
 476                                     (assoc-ref %build-inputs "ucx")))
 477                    '()))
 478
 479        #:phases (modify-phases %standard-phases
 480                   (add-after 'unpack 'patch-sources
 481                     (lambda _
 482                       (substitute* "./maint/gen_subcfg_m4"
 483                         (("/usr/bin/env") (which "env")))
 484                       (substitute* "src/glue/romio/all_romio_symbols"
 485                         (("/usr/bin/env") (which "env")))
 486                       (substitute* (find-files "." "buildiface")
 487                         (("/usr/bin/env") (which "env")))
 488                       (substitute* "maint/extracterrmsgs"
 489                         (("/usr/bin/env") (which "env")))
 490                       (substitute* (find-files "." "f77tof90")
 491                         (("/usr/bin/env") (which "env")))
 492                       (substitute* (find-files "." "\\.sh$")
 493                         (("/bin/sh") (which "sh")))))
 494                   (add-before 'configure 'fix-makefile
 495                     (lambda _
 496                       ;; Remove "@hwloclib@" from 'pmpi_convenience_libs'.
 497                       ;; This fixes "No rule to make target '-lhwloc', needed
 498                       ;; by 'lib/libmpi.la'".
 499                       (substitute* "Makefile.in"
 500                         (("^pmpi_convenience_libs = (.*) @hwloclib@ (.*)$" _
 501                           before after)
 502                          (string-append "pmpi_convenience_libs = "
 503                                         before " " after)))))
 504                   (add-before 'configure 'define-gfortran-wrapper
 505                     (lambda* (#:key inputs #:allow-other-keys)
 506                       ;; 'configure' checks whether the Fortran compiler
 507                       ;; allows argument type mismatch.  Since gfortran >= 10
 508                       ;; does not, provide a wrapper that passes
 509                       ;; '-fallow-argument-mismatch' to get the desired
 510                       ;; behavior.
 511                       (mkdir-p ".gfortran-wrapper/bin")
 512                       (call-with-output-file ".gfortran-wrapper/bin/gfortran"
 513                         (lambda (port)
 514                           (display (string-append "#!" (which "sh") "\n")
 515                                    port)
 516                           (display
 517                            (string-append "exec \"" (which "gfortran")
 518                                           "\" -fallow-argument-mismatch"
 519                                           " \"$@\"\n")
 520                            port)
 521                           (chmod port #o755)))
 522
 523                       (setenv "PATH"
 524                               (string-append (getcwd) "/"
 525                                              ".gfortran-wrapper/bin:"
 526                                              (getenv "PATH"))))))))
 527     (home-page "https://www.mpich.org/")
 528     (synopsis "Implementation of the Message Passing Interface (MPI)")
 529     (description
 530      "MPICH is a high-performance and portable implementation of the Message
 531 Passing Interface (MPI) standard (MPI-1, MPI-2 and MPI-3).  MPICH provides an
 532 MPI implementation that efficiently supports different computation and
 533 communication platforms including commodity clusters, high-speed networks (10
 534 Gigabit Ethernet, InfiniBand, Myrinet, Quadrics), and proprietary high-end
 535 computing systems (Blue Gene, Cray).  It enables research in MPI through a
 536 modular framework for other derived implementations.")
 537     (license license:bsd-2)))