igakit windows 10 64bit installation (with python 2.7) error lnk2019

Question

I'm trying to install igakit python extension as part of installing all required dependencies for sfepy package as mentioned in their installation guide page http://sfepy.org/doc-devel/installation.html#requirements .

Sadly, there's no wheel file for it to run using pip.

My installation process was (and still) full of errors to appear and they were 2-phase long, but I will describe only the current phase.

Phase #2: Installed software:-

1-Python 2.7.13 (64-bit)

2-Microsoft Visual C++ for Python 2.7

3-Microsoft Visual C++ 2010 x64 Redistributable

4-Microsoft Visual C++ 2010 x86 Redistributable

5-MinGW-w64 & Msys2 installed as described in this site https://computingabdn.com/softech/mingw-howto-install-gcc-for-windows/ .

When I hit

    python setup.py install --user

on to the downloaded top level directory of igakit in command prompt this error comes up

    igalibmodule.obj : warning LNK4197: export 'initigalib' specified multiple times; using first specification
Creating library build\temp.win-amd64-2.7\Release\build\src.win-amd64-2.7\igakit\igalib.lib and object build\temp.win-amd64-2.7\Release\build\src.win-amd64-2.7\igakit\igalib.exp
igalib.o : error LNK2019: unresolved external symbol _gfortran_internal_pack referenced in function __bspline_MOD_removeknot
igalib.o : error LNK2019: unresolved external symbol _gfortran_matmul_r8 referenced in function __bspeval_MOD_interpolate
igalib.o : error LNK2019: unresolved external symbol _gfortran_stop_string referenced in function __bsp_MOD_hessian3
build\lib.win-amd64-2.7\igakit\igalib.pyd : fatal error LNK1120: 3 unresolved externals

I've also googled this problem before and found that this problem could be caused from a declared but not defined external variable or function, but sadly as I just have little programming experience, and as googling results are mainly devoted to visual studio (which isn't installed in my computer) I can't push further to grab the source of this issue.

Any help ?

Answer 1

According to the answers here from what the repository owner sincerely gave to me, to resolve the problem you need to:-

At the top level directory open the file setup.cfg then add the following

[build]
#debug = 0
compiler = mingw32

[build_ext]
libraries = gfortran # or maybe libgfortran?

2- save the file then try again hitting python setup.py install --user.

---

Notes before implementing the solution:-

1- If you wish to install it in the Python system location, hit python setup.py install without the --user flag.

2-If you didn't solve the ((Unable to find vcvarsall.bat)) yet, go and search using the search engine within you 'windows explorer' window the C:\ partition for the file vcvarsall.bat, then get its location.

Then, open the file msvc9compiler.py (search for it in C:\Python27), look for the function query_vcvarsall, and within it look for the variable vcvarsall, then assign the full path of vcvarsall.bat to it.