[SciPy-Dev] Building SciPy from source for development

[Isabel Kaspriskie]

Hello,

I am setting up my development environment in order to start contributing
to the scipy repo. I have run into an error that I have not been able to
diagnose myself. When running `python setup.py install --user`, I find the
following error. The output is large, so I have only copied the end of it,
but please let me know if it is acceptable to attach a text file of the
output if that helps.

...
building 'rectangular_lsap' library
compiling C++ sources
C compiler: g++ -pthread -B
/home/isabelgk/miniconda3/envs/scipy-dev/compiler_compat -Wl,--sysroot=/
-Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC

creating build/temp.linux-x86_64-3.7/scipy/optimize/rectangular_lsap
compile options:
'-I/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages/numpy/core/include
-I/home/isabelgk/miniconda3/envs/scipy-dev/include/python3.7m -c'
g++: scipy/optimize/rectangular_lsap/rectangular_lsap.cpp
error: Command "g++ -pthread -B
/home/isabelgk/miniconda3/envs/scipy-dev/compiler_compat -Wl,--sysroot=/
-Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC
-I/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages/numpy/core/include
-I/home/isabelgk/miniconda3/envs/scipy-dev/include/python3.7m -c
scipy/optimize/rectangular_lsap/rectangular_lsap.cpp -o
build/temp.linux-x86_64-3.7/scipy/optimize/rectangular_lsap/rectangular_lsap.o
-MMD -MF
build/temp.linux-x86_64-3.7/scipy/optimize/rectangular_lsap/rectangular_lsap.o.d"
failed with exit status 127



I have run the numpy diagnose utility, and it seems that there is a warning
about being unable to read the registry to find my Fortran compiler setting.

>>> python -c 'from numpy.f2py.diagnose import run; run()'

------
os.name='posix'
------
sys.platform='linux'
------
sys.version:
3.7.4 (default, Aug 13 2019, 20:35:49)
[GCC 7.3.0]
------
sys.prefix:
/home/isabelgk/miniconda3/envs/scipy-dev
------
sys.path=':/home/isabelgk/miniconda3/envs/scipy-dev/lib/python37.zip:/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7:/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/lib-dynload:/home/isabelgk/.local/lib/python3.7/site-packages:/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages'
------
Found new numpy version '1.16.4' in
/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages/numpy/__init__.py
Found f2py2e version '2' in
/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages/numpy/f2py/f2py2e.py
Found numpy.distutils version '0.4.0' in
'/home/isabelgk/miniconda3/envs/scipy-dev/lib/python3.7/site-packages/numpy/distutils/__init__.py'
------
Importing numpy.distutils.fcompiler ... ok
------
Checking availability of supported Fortran compilers:
Warning: Can't read registry to find the necessary compiler setting
Make sure that Python modules winreg, win32api or win32con are installed.
Gnu95FCompiler instance properties:
  archiver        = ['/usr/bin/gfortran', '-cr']
  compile_switch  = '-c'
  compiler_f77    = ['/usr/bin/gfortran', '-Wall', '-g', '-ffixed-form', '-
                    fno-second-underscore', '-fPIC', '-O3', '-funroll-loops']
  compiler_f90    = ['/usr/bin/gfortran', '-Wall', '-g', '-fno-second-
                    underscore', '-fPIC', '-O3', '-funroll-loops']
  compiler_fix    = ['/usr/bin/gfortran', '-Wall', '-g', '-ffixed-form', '-
                    fno-second-underscore', '-Wall', '-g', '-fno-second-
                    underscore', '-fPIC', '-O3', '-funroll-loops']
  libraries       = ['gfortran']
  library_dirs    = ['/usr/lib/gcc/x86_64-linux-gnu/7', '/usr/lib/gcc/x86_64
                    -linux-gnu/7']
  linker_exe      = ['/usr/bin/gfortran', '-Wall', '-Wall']
  linker_so       = ['/usr/bin/gfortran', '-Wall', '-g', '-Wall', '-g', '-
                    shared']
  object_switch   = '-o '
  ranlib          = ['/usr/bin/gfortran']
  version         = LooseVersion ('7')
  version_cmd     = ['/usr/bin/gfortran', '-dumpversion']
Fortran compilers found:
  --fcompiler=gnu95  GNU Fortran 95 compiler (7)
Compilers available for this platform, but not found:
  --fcompiler=absoft   Absoft Corp Fortran Compiler
  --fcompiler=compaq   Compaq Fortran Compiler
  --fcompiler=g95      G95 Fortran Compiler
  --fcompiler=gnu      GNU Fortran 77 compiler
  --fcompiler=intel    Intel Fortran Compiler for 32-bit apps
  --fcompiler=intele   Intel Fortran Compiler for Itanium apps
  --fcompiler=intelem  Intel Fortran Compiler for 64-bit apps
  --fcompiler=lahey    Lahey/Fujitsu Fortran 95 Compiler
  --fcompiler=nag      NAGWare Fortran 95 Compiler
  --fcompiler=nagfor   NAG Fortran Compiler
  --fcompiler=pathf95  PathScale Fortran Compiler
  --fcompiler=pg       Portland Group Fortran Compiler
  --fcompiler=vast     Pacific-Sierra Research Fortran 90 Compiler
Compilers not available on this platform:
  --fcompiler=flang     Portland Group Fortran LLVM Compiler
  --fcompiler=hpux      HP Fortran 90 Compiler
  --fcompiler=ibm       IBM XL Fortran Compiler
  --fcompiler=intelev   Intel Visual Fortran Compiler for Itanium apps
  --fcompiler=intelv    Intel Visual Fortran Compiler for 32-bit apps
  --fcompiler=intelvem  Intel Visual Fortran Compiler for 64-bit apps
  --fcompiler=mips      MIPSpro Fortran Compiler
  --fcompiler=none      Fake Fortran compiler
  --fcompiler=sun       Sun or Forte Fortran 95 Compiler
For compiler details, run 'config_fc --verbose' setup command.
------
Importing numpy.distutils.cpuinfo ... ok
------
CPU information: CPUInfoBase__get_nbits getNCPUs has_mmx has_sse
has_sse2 has_sse3 has_ssse3 is_64bit is_Intel is_i686 ------


Thank you in advance,

Isabel
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