Bug relates to the interplay between:
1. random dict orders in python 3.5
2. bugfix in initial implementation of stacks for `_concretize_dependencies`
   when `self._dependencies` is empty
3. bug in coconcretization algorithm computation of split specs

Result was transient hang in coconcretization.
Fixed #3 (bug in coconcretization) to resolve.

* Fixed building coreutils on Darwin

* Bump nano version to 4.9

* Coreutils: Add program prefix g so we don't conflict with Apple utilities

* Fix intendation

* Make format more spack like

* Removed unnecesary changes

* Merge branch 'develop' of github.com:DiegoMagdaleno/spack into develop

Fix linking libgit2 on Darwin

* Revert "Merge pull request #3 from spack/develop"

This reverts commit 58dbbdb, reversing
changes made to dd7a413.

* Revert "Revert "Merge pull request #3 from spack/develop""

This reverts commit f956aa7.

* Revert "Merge branch 'develop' of github.com:DiegoMagdaleno/spack into develop"

This reverts commit 50321f7.

Whenever attempting to use any ncurses functionality within cscope, a
page fault would result within the ncurses library.

    Program received signal SIGSEGV, Segmentation fault.
    0x00007ffff7fad3cf in termattrs_sp () from .../lib/libncursesw.so.6
    (gdb) bt
    #0  0x00007ffff7fad3cf in termattrs_sp () from .../lib/libncursesw.so.6
    #1  0x00007ffff7faa794 in _nc_setupscreen_sp () from .../lib/libncursesw.so.6
    #2  0x00007ffff7fa614c in newterm_sp () from .../lib/libncursesw.so.6
    #3  0x00007ffff7fa65b9 in newterm () from .../lib/libncursesw.so.6
    #4  0x00007ffff7fa2970 in initscr () from .../lib/libncursesw.so.6
    #5  0x0000000000403dc2 in main (argc=<optimized out>, argv=0x7fffffffcea8) at main.c:574

This is due to a conflict between libtinfo.so and libtinfow.so. Both are
linked into cscope:

    $ ldd $(which cscope)
    /bin/bash: .../lib/libtinfo.so.6: no version information available (required by /bin/bash)
        linux-vdso.so.1 (0x00007fff5dbcb000)
        libncursesw.so.6 => .../lib/libncursesw.so.6 (0x00007f435cc69000)
        libtinfo.so.6 => .../lib/libtinfo.so.6 (0x00007f435cc2c000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f435ca29000)
        libtinfow.so.6 => .../lib/libtinfow.so.6 (0x00007f435c9e8000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f435cca7000)

Specifically linking libtinfow.so instead of libtinfo.so resolves the
issue.

All instances of '...' above represent the path to the installed ncurses
for Spack.

* Add Collier and SysCalc recipes

* Remove extra syscalc version

* Build collier with -j1 for @:1.2.4

* Add recipe for gosam-contrib

* Update gosam-contrib recipe with 'provides'

* Madgraph recipe, first version

* Finalize madgraph recipe + flake8

* Make py2 version of madgraph default; fix hash for syscalc; fix patch

* Handle virtual packages (#3)

* Update package.py

* Update packages.yaml

* Remove virtual packages - pt. 1

* Remove virtual packages - pt. 2

* Changes from review - pt. 1

* Changes from code review - pt. 2

* Update var/spack/repos/builtin/packages/collier/package.py

Co-authored-by: Adam J. Stewart <[email protected]>

* Update var/spack/repos/builtin/packages/madgraph5amc/package.py

Co-authored-by: Adam J. Stewart <[email protected]>

* Add hash for version 2.7.2 (available in our private mirror)

* Fixes for 2.7.3 family

* Patches for 2.7.3{.py3,}{.atlas,}

* Fix hash of syscalc

* Hack to fix concretization (2.7.3 matches 2.7.3.py3)

* Add conflict statement (reported to devs)

* Apply suggestions from code review

Co-authored-by: Adam J. Stewart <[email protected]>

* Update package.py

* Delete madgraph5amc-2.7.2.atlas.patch

* Delete madgraph5amc-2.7.2.patch

* Update package.py

* Apply suggestions from code review

Co-authored-by: Adam J. Stewart <[email protected]>

Co-authored-by: iarspider <[email protected]>
Co-authored-by: Adam J. Stewart <[email protected]>

* Set LIBVER and LIBMAJOR

* Typo fix

* Fix 2

* Fix #3

1. support version 3.1.3, which now depends on sundials@6

2. support version 3.1.2:, which broke the two patch files and
   therefore the two patch files have been replaced by more flexible
   filter_file() commands inside a patch() function.

3. rename the variant for python extension from using the package name
   "+pyuqtk" to the more standard "+python"

4. add maintainers @omsai and the upstream developer @bjdebus who
   offered to help with the spack packaging.

5. swig should only be a build-time dependency.  swig is only
   necessary until @:3.1.0

6. confirmed python dependencies are correct by inspecting imports,
   subset python dependencies type to build, run, and confirmed all
   31 build-time tests pass including the 9 python tests:

```console
$ spack env create uqtk-dev
$ spack add [email protected]
$ spack install --test root && cat $(spack location -i uqtk)/.spack/install-time-test-log.txt
==> Testing package uqtk-3.1.3-nok6fut
==> [2023-04-19-14:56:25.005361] Running build-time tests
==> [2023-04-19-14:56:25.005536] RUN-TESTS: build-time tests [check]
==> [2023-04-19-14:56:25.009543] '/home/omsai/src/spack/opt/spack/linux-pureos10-skylake/gcc-10.2.1/gmake-4.4.1-b6g4apmfvxz3bn4eabh37dehcrg65fj7/bin/make' '-j4' '-n' 'test'
==> [2023-04-19-14:56:25.014903] '/home/omsai/src/spack/opt/spack/linux-pureos10-skylake/gcc-10.2.1/gmake-4.4.1-b6g4apmfvxz3bn4eabh37dehcrg65fj7/bin/make' '-j4' 'test'
Running tests...
/home/omsai/src/spack/opt/spack/linux-pureos10-skylake/gcc-10.2.1/cmake-3.26.3-zjmsfz23j5l4ytniz26uzvxonlu5qebr/bin/ctest --force-new-ctest-process
Test project /tmp/omsai/spack-stage/spack-stage-uqtk-3.1.3-nok6fut47h42cnaau7wkoohgqy5f2qqa/spack-build-nok6fut
      Start  1: ArrayReadAndWrite
      Start  2: ArrayDelColumn
      Start  3: Array1DMiscTest
      Start  4: Array2DMiscTest
 1/31 Test  #1: ArrayReadAndWrite ................   Passed    0.01 sec
      Start  5: ArraySortTest
 2/31 Test  #2: ArrayDelColumn ...................   Passed    0.01 sec
      Start  6: MultiIndexTest
 3/31 Test  #3: Array1DMiscTest ..................   Passed    0.01 sec
      Start  7: CorrTest
 4/31 Test  #4: Array2DMiscTest ..................   Passed    0.01 sec
      Start  8: QuadLUTest
 5/31 Test  #5: ArraySortTest ....................   Passed    0.02 sec
      Start  9: MCMC2dTest
 6/31 Test  #6: MultiIndexTest ...................   Passed    0.01 sec
      Start 10: MCMCRandomTest
 7/31 Test  #8: QuadLUTest .......................   Passed    0.02 sec
      Start 11: MCMCNestedTest
 8/31 Test #10: MCMCRandomTest ...................   Passed    0.02 sec
      Start 12: Deriv1dTest
 9/31 Test #12: Deriv1dTest ......................   Passed    0.01 sec
      Start 13: SecondDeriv1dTest
10/31 Test #13: SecondDeriv1dTest ................   Passed    0.01 sec
      Start 14: GradHessianTest
11/31 Test #11: MCMCNestedTest ...................   Passed    0.03 sec
      Start 15: GradientPCETest
12/31 Test #14: GradHessianTest ..................   Passed    0.01 sec
      Start 16: PCE1dTest
13/31 Test #15: GradientPCETest ..................   Passed    0.01 sec
      Start 17: PCEImplTest
14/31 Test #16: PCE1dTest ........................   Passed    0.01 sec
      Start 18: PCELogTest
15/31 Test #18: PCELogTest .......................   Passed    0.01 sec
      Start 19: Hessian2dTest
16/31 Test #19: Hessian2dTest ....................   Passed    0.01 sec
      Start 20: BCS1dTest
17/31 Test #20: BCS1dTest ........................   Passed    0.01 sec
      Start 21: BCS2dTest
18/31 Test #21: BCS2dTest ........................   Passed    0.01 sec
      Start 22: LowRankRegrTest
19/31 Test #22: LowRankRegrTest ..................   Passed    0.01 sec
      Start 23: PyModTest
20/31 Test #17: PCEImplTest ......................   Passed    0.07 sec
      Start 24: PyArrayTest
21/31 Test #23: PyModTest ........................   Passed    0.08 sec
      Start 25: PyArrayTest2
22/31 Test #25: PyArrayTest2 .....................   Passed    0.30 sec
      Start 26: PyQuadTest
23/31 Test #24: PyArrayTest ......................   Passed    1.44 sec
      Start 27: PyBCSTest1D
24/31 Test #26: PyQuadTest .......................   Passed    1.68 sec
      Start 28: PyBCSTest2D
25/31 Test #27: PyBCSTest1D ......................   Passed    1.66 sec
      Start 29: PyBADPTest
26/31 Test  #7: CorrTest .........................   Passed    3.43 sec
      Start 30: PyRegressionTest
27/31 Test #28: PyBCSTest2D ......................   Passed    1.50 sec
      Start 31: PyGalerkinTest
28/31 Test  #9: MCMC2dTest .......................   Passed    3.90 sec
29/31 Test #29: PyBADPTest .......................   Passed    1.66 sec
30/31 Test #30: PyRegressionTest .................   Passed    1.72 sec
31/31 Test #31: PyGalerkinTest ...................   Passed    1.63 sec

100% tests passed, 0 tests failed out of 31

Total Test time (real) =   5.35 sec
==> [2023-04-19-14:56:30.382797] '/home/omsai/src/spack/opt/spack/linux-pureos10-skylake/gcc-10.2.1/gmake-4.4.1-b6g4apmfvxz3bn4eabh37dehcrg65fj7/bin/make' '-j4' '-n' 'check'
==> [2023-04-19-14:56:30.385983] Target 'check' not found in Makefile
```