[PyQt] Help with getting sip built on Windows

Neil Jansen njansen1 at gmail.com
Sat Feb 9 16:00:53 GMT 2019

Thank you, that completely answers my question.  It was a search mistake on
my part, 'sip' vs ' PyQt5-sip' on pypi.org.

In case I do have to revisit the Windows build environment (maybe for
pyqtdeploy later on), is there any help you can give on getting a working
MSVC++ 2015 or 2017 environment setup?  Can the free MS build tools be
used, or does it require the full Visual Studio?

On Sat, Feb 9, 2019 at 10:37 AM Phil Thompson <phil at riverbankcomputing.com>

> On 9 Feb 2019, at 3:15 pm, Neil Jansen <njansen1 at gmail.com> wrote:
> >
> > I'm trying to get the commercial version of PyQt5 built in Windows, and
> I'm stuck.
> >
> > The tl;dr is that I'm looking for one of two things:
> >
> > 1) An official wheel distribution of sip that's greater than 4.19.11
> >
> > or,
> >
> > 2) A layman's guide to setting up a build environment to compile sip,
> that was written on or after 2017 (because Microsoft's releases and
> download links changed after that date).
> >
> > I'm trying to do this with the freely available tools that can be
> downloaded from Microsoft's site, I haven't budgeted for a full copy of MS
> VC++ / Visual Studio nor have I even looked to see what those have costed,
> I'm assuming that I can do it with free tools but again, I've not found a
> concrete guide that gives this information.
> >
> > And ideally, I'm looking for a guide that assumes that I have basic
> C/C++ skills (I can compile C++ code fine on Linux and Mac, which are quite
> pleasant), but cannot manage to figure out how to get the MS VC++ toolchain
> installed due to a mixture of ignorance of what the toolchain ecosystem
> consists of, and complexity / fragility of Microsoft's toolchain when being
> run from a commandline (Having to start in certain shells to have the
> environment variables just right, and the fact that it's such a moving
> target, with so many operating systems and SDK versions to keep track of).
> >
> >
> > For more details of where I'm actually stuck at, read below, or just
> skip it as it's kind of long-winded and is only supplemental to my question.
> >
> > -----
> >
> > Here's the list of events that led up to the question(s) above:
> >
> > I'm able to build the commercial wheel for PyQt5, from the instructions
> provided.  In order to install the wheels, it's needing a dependency to the
> sip package.  OK let's go get that.
> >
> > First stop was Riverbank's download page but they don't release wheels
> directly.
> >
> > Next stop was pypi because I know they'll be there.  Latest
> distributable wheel version of sip on pypi.org is 4.19.8.  So I attempt
> to use that as a dependency when installing the
> 'PyQt5_commercial-5.11.3-5.12.1-cp35.cp36.cp37.cp38-none-win_amd64.whl'
> file.  That fails, due to a dependency error.  It requires sip version >=
> 4.19.11, < 4.20.
> >
> > OK so maybe I can install it from source?  (on Windows, ugh)
> >
> > I download the source (currently at 4.19.13) from riverbank, go through
> the instructions, get it configured, and then try to run 'make', per the
> instructions on riverbank's site.  I google a bit, find some mailing list
> threads that mention using 'nmake' because it it's Windows and they have to
> do everything different.  I've previously attempted to install MSVC2015 for
> various other Python / Cython reasons.  Cython works fine, but nmake fails
> the first time I run it.  'cl.exe' is not found.  I google some more, and
> end up installing Microsoft 2017 build tools.  I couldn't even find the
> 2015 build tools and it seems like Microsoft has either pulled it /
> deprecated it, or is making the link really hard to find (most '2015 build
> tools' links redirect to '2017 build tools').  So after a half-hour and a
> reboot, still no luck.  This time, I get an even weirder error, cl.exe
> returned D8021, invalid numeric argument /FS.  I google more, something
> about making sure you're running 'vcvars32.bat', but I have no such file on
> my system.  Most of the information is pre-2015 or returns 404's because
> Microsoft re-organizes their page without bothering to give the common
> courtesy of a redirect.  This is frustrating.
> >
> > At this point, I've basically given up and admitted defeat.  I can't
> find a single guide of how to get the build system 100% setup in Microsoft
> Windows.  Microsoft's support pages are so scattered and broken and
> unorganized and irrelevant that I have no idea what I even need to
> download.  Searches for "python" and "Visual C++" usually bring up the
> opposite (trying to get python environment installed inside visual studio
> ).  So it's not that I'm not trying, it's just really difficult to sort out
> the relevant from the irrelevant.
> >
> > So is there a guide that I missed somewhere?  I've looked everywhere and
> can't find it, if it exists.  Any help would be appreciated.
> The dependency is on v4.19.11 of...
> https://pypi.org/project/PyQt5-sip/
> Phil
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