Can't compile "Hello world" program. Not sure why!

[BLutherEUNE]

Hi, I just stared with PyD and I am trying to make it work. I have downloaded the latest release version and unzipped it in my working directory. Also I copied the two files from the documentation (the kind of "hello world" program). I am using windows 10 and python 2.7.12 so I run the command python .\setup.py pydexe but I get the following error

travis_fold:end:pyd_compile-dcaf5080-fb16-11e9-84a3-f859714c6a61
Traceback (most recent call last):
  File ".\setup.py", line 10, in <module>
    build_deimos=True, d_lump=True
  File "C:\Users\PapaniGe\Desktop\learning\project earth\pydtest\pyd\support.py", line 230, in setup
    base_setup(*args, **kwargs)
  File "C:\Users\PapaniGe\AppData\Local\Continuum\Anaconda2\lib\distutils\core.py", line 151, in setup
    dist.run_commands()
  File "C:\Users\PapaniGe\AppData\Local\Continuum\Anaconda2\lib\distutils\dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "C:\Users\PapaniGe\AppData\Local\Continuum\Anaconda2\lib\distutils\dist.py", line 972, in run_command
    cmd_obj.run()
  File "C:\Users\PapaniGe\Desktop\learning\project earth\pydtest\pyd\support.py", line 128, in run
    self.per_ext(ext)
  File "C:\Users\PapaniGe\Desktop\learning\project earth\pydtest\pyd\support.py", line 169, in per_ext
    target_lang=language)
  File "C:\Users\PapaniGe\AppData\Local\Continuum\Anaconda2\lib\distutils\ccompiler.py", line 700, in link_executable
    debug, extra_preargs, extra_postargs, None, target_lang)
  File "C:\Users\PapaniGe\Desktop\learning\project earth\pydtest\pyd\dcompiler.py", line 750, in link
    return DCompiler.link(self, *args, **kwargs)
  File "C:\Users\PapaniGe\Desktop\learning\project earth\pydtest\pyd\dcompiler.py", line 520, in link
    library_dirs = list(set(_build_ext_library_dirs() + library_dirs))
TypeError: unsupported operand type(s) for +: 'NoneType' and 'list'

It appears that it tries to add two lists but the one is empty, so it breaks. Any thoughts?

[ariovistus]

looks like _build_ext_library_dirs() is trying to get library dirs out of distutils. I'm wondering if you haven't installed pyd as a python module? in C:\Users\PapaniGe\Desktop\learning\project earth\pydtest, run python setup.py install

[BLutherEUNE]

Thanks. So, after setting up the library paths correctly I got rid of that error. I managed to build the hello world examples for both extending and embedding python on windows 7, but I have a problem on windows 10.

In particular for the extending example ( https://pyd.readthedocs.io/en/latest/extend.html ) lld-link complains with stuff like lld-link: error: unknown directive: EXETYPE. I fixed these by removing all lines except LIBRARY "hello.pyd" in my python_dll_def.def file, but now I get this error: lld-link: error: subsystem must be defined. I tried to resolve this by adding /subsystem:widows and /subsystem:console using the -L flag in the dmd command that runs behind the scenes, but then I get other linker errors regarding app entry point...

Any idea what to try next? Note that this seems to be a windows 10 issue, I managed to build everything fine on windows 7. Thanks a lot.

[ariovistus]

I just tried it in win10 and met success. I installed dmd 2.088.1 with the vs2017 build tools. from cmd, I ran

C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat

then built and ran examples/hello

python setup.py build
python test.py

which worked, but it did output some warnings:

build\temp.win-amd64-2.7\Release\infra\python_dll_def.def(2) : warning LNK4017: EXETYPE statement not supported for the target platform; ignored
build\temp.win-amd64-2.7\Release\infra\python_dll_def.def(3) : warning LNK4017: SUBSYSTEM statement not supported for the target platform; ignored
build\temp.win-amd64-2.7\Release\infra\python_dll_def.def(4) : warning LNK4017: CODE statement not supported for the target platform; ignored
build\temp.win-amd64-2.7\Release\infra\python_dll_def.def(4) : warning LNK4017: DATA statement not supported for the target platform; ignored

[BLutherEUNE]

Thanks for the reply. So, one problem I have is that I can't install msvc or the build tools on the windows 10 machine without a license, as this is a corporate machine. I tried installing Windows SDK 7.1, which results in turning the errors into warnings as in your case, but I get a couple of different linker errors afterwards...

Creating library build\lib.win-amd64-2.7\hello.lib and object build\lib.win-amd64-2.7\hello.exp
libcmt.lib(dllcrt0.obj) : error LNK2005: _aenvptr already defined in libcmt.lib(crt0.obj)
libcmt.lib(dllcrt0.obj) : error LNK2005: _wenvptr already defined in libcmt.lib(crt0.obj)
libcmt.lib(dllcrt0.obj) : error LNK2005: __error_mode already defined in libcmt.lib(crt0.obj)
libcmt.lib(dllcrt0.obj) : error LNK2005: __app_type already defined in libcmt.lib(crt0.obj)
libcmt.lib(invarg.obj) : error LNK2019: unresolved external symbol RtlVirtualUnwind referenced in function _call_reportfault
libcmt.lib(gs_report.obj) : error LNK2001: unresolved external symbol RtlVirtualUnwind
libcmt.lib(invarg.obj) : error LNK2019: unresolved external symbol RtlLookupFunctionEntry referenced in function _call_reportfault
libcmt.lib(gs_report.obj) : error LNK2001: unresolved external symbol RtlLookupFunctionEntry
libcmt.lib(chandler.obj) : error LNK2019: unresolved external symbol __imp_RtlUnwindEx referenced in function __C_specific_handler
libcmt.lib(crt0.obj) : error LNK2019: unresolved external symbol main referenced in function __tmainCRTStartup
libcmt.lib(jmpuwind.obj) : error LNK2019: unresolved external symbol RtlUnwindEx referenced in function _local_unwind
build\lib.win-amd64-2.7\hello.pyd : fatal error LNK1120: 5 unresolved externals

I'll try to figure this out, but meanwhile, if you have an idea why exactly (and which components of) msvc is / are needed for building these extensions (e.g. Cython doesn't need these -- it works fine with just Visual C++ for Python), please let me know. Thanks again!