Adding first version for spack

### Spack

You can use Spack to install GekkoFS and let it handle all the dependencies. First, you will need to install Spack:

```

git clone https://github.com/spack/spack.git

. spack/share/spack/setup-env.sh

```

Once Spack is installed and available in your path, add gekkofs to the Spack namespace.

```

spack repo add gekkofs/scripts/spack

```

You can then check that Spack can find GekkoFS by typing:

```

spack info gekkofs

```

Finally, just install GekkoFS. You can also install variants (tests, forwarding mode, AGIOS scheduling).

```bash

spack install gekkofs

# for installing tests dependencies and running tests

spack install -v --test=root gekkofs +tests

```

Remember to load GekkoFS to run:

```

spack load gekkofs

```

If you want to enable the forwarding mode:

```

spack install gekkofs +forwarding

```

If you want to enable the AGIOS scheduling library for the forwarding mode:

```

spack install gekkofs +forwarding +agios

```

If you want to use the latest developer branch of GekkoFS:

```

spack install gekkofs@latest

```

The default is using version 0.9.1 the last stable release.

# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other

# Spack Project Developers. See the top-level COPYRIGHT file for details.

#

# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack import *

class Agios(CMakePackage):

    """AGIOS: an I/O request scheduling library at file level."""

    homepage = "https://github.com/francielizanon/agios"

    url      = "https://github.com/jeanbez/agios/archive/refs/tags/v1.0.tar.gz"

    git      = "https://github.com/francielizanon/agios.git"

    version('latest', branch='development')

    version('1.0', sha256='e8383a6ab0180ae8ba9bb2deb1c65d90c00583c3d6e77c70c415de8a98534efd')

    depends_on('libconfig')

# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other

# Spack Project Developers. See the top-level COPYRIGHT file for details.

#

# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack import *

class Bmi(AutotoolsPackage):

    """FIXME: Put a proper description of your package here."""

    homepage = 'https://github.com/radix-io/bmi/'

    git = 'https://github.com/radix-io/bmi.git'

    maintainers = ['carns', 'jeanbez']

    version('main', branch='main')

    depends_on('autoconf', type='build')

    depends_on('automake', type='build')

    # need to override 'autoreconf' so we can run BMI's 'prepare' script

    def autoreconf(self, spec, prefix):

        Executable('./prepare')()

    def configure_args(self):

        args = [

            '--enable-shared',

            '--enable-bmi-only',

            '--disable-static',

            '--disable-karma',

            '--enable-fast',

            '--disable-strict'

        ]

        return args

--- a/src/daemon/CMakeLists.txt	2021-07-08 16:40:56.952476529 -0700

+++ b/src/daemon/CMakeLists.txt	2021-07-08 16:49:09.257352458 -0700

@@ -66,31 +66,23 @@

     )

 ################### Forwarding daemon ###################

 if (GKFS_ENABLE_FORWARDING)

-    if (GKFS_ENABLE_AGIOS)

-        set(FWD_DAEMON_SRC

-            ${DAEMON_SRC}

-            scheduler/agios.cpp

+    set(FWD_DAEMON_SRC

+        ${DAEMON_SRC}

+        scheduler/agios.cpp

         )

-        set(FWD_DAEMON_HEADERS

-            ${DAEMON_HEADERS}

-            ../../include/daemon/scheduler/agios.hpp

+    set(FWD_DAEMON_HEADERS

+        ${DAEMON_HEADERS}

+        ../../include/daemon/scheduler/agios.hpp

         )

-        add_executable(gkfwd_daemon ${FWD_DAEMON_SRC} ${FWD_DAEMON_HEADERS})

+    add_executable(gkfwd_daemon ${FWD_DAEMON_SRC} ${FWD_DAEMON_HEADERS})

+    if (GKFS_ENABLE_AGIOS)

         target_compile_definitions(gkfwd_daemon

             PUBLIC

             GKFS_ENABLE_FORWARDING

             DGKFS_ENABLE_AGIOS

             )

     else ()

-        set(FWD_DAEMON_SRC

-            ${DAEMON_SRC}

-        )

-        set(FWD_DAEMON_HEADERS

-            ${DAEMON_HEADERS}

-        )

-        add_executable(gkfwd_daemon ${FWD_DAEMON_SRC} ${FWD_DAEMON_HEADERS})

-

         target_compile_definitions(gkfwd_daemon

             PUBLIC

             GKFS_ENABLE_FORWARDING

--- a/CMake/FindDate.cmake	2021-07-04 23:47:33.784047611 -0700

+++ b/CMake/FindDate.cmake	2021-07-04 23:54:14.063139808 -0700

@@ -35,7 +35,7 @@

 )

 find_library(TZ_LIBRARY

-    NAMES tz

+    NAMES date-tz

 )

 include(FindPackageHandleStandardArgs)