Re: [C++-sig] Boost Python Wrong Python Version macOS

2020-09-07 Thread Mortimer Hemmit 
Hi Stefan,

Apologies for breaking the reply chain; I wasn't subscribed to the
list earlier, so this is the only message I could reply to. Now I
should be able to reply to other messages.

Thanks for your email. I don't think that ./b2 has the option to
specify the python version within --with-python - I think only
./bootstrap does. When I tried

./b2 --with-python=3.7

I got;

*BEGIN OUTPUT*
error: wrong library name 'python=3.7' in the --with- option.
*END OUTPUT*

Then, I tried invoking ./b2 with option python=3.7.

sudo ./b2 python=3.7 --with-python

*BEGIN OUTPUT*
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/feature.jam:491:
in feature.validate-value-string from module feature
error: "3.7" is not a known value of feature 
error: legal values: "2.7"
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/property.jam:333:
in validate1 from module property
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/property.jam:359:
in property.validate from module property
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/build-request.jam:271:
in convert-command-line-element from module build-request
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/build-request.jam:222:
in build-request.convert-command-line-elements from module
build-request
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build-system.jam:774:
in load from module build-system
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/kernel/modules.jam:295:
in import from module modules
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/kernel/bootstrap.jam:139:
in boost-build from module
/Users/Mort/Downloads/boost_1_74_0/boost-build.jam:17: in module scope
from module
*END OUTPUT*

Either way, it seems like the ./b2 program doesn't recognize version
3.7, only 2.7.

Let me know if you need any more information. Any help is greatly appreciated.

Thanks,
Mortimer



On Thu, Sep 3, 2020 at 2:19 PM Mortimer Hemmit
 wrote:
>
> Hello,
>
> I am trying to build the Python library for Boost 1.74.0 on macOS
> Catalina 10.15.8 with the default Clang 11.0.3. I also installed
> Python 3.7.9 from python.org
>
> I am following the instructions located at
> 
> and 
> 
>
> I untar the archive and then execute this command in the boost directory:
>
> ./bootstrap.sh --with-python=python3.7 --with-libraries=python
>
> This gives me output saying that it detected python 3.7.
>
> *BEGIN OUTPUT*
> Building Boost.Build engine with toolset clang... tools/build/src/engine/b2
> Detecting Python version... 3.7
> Detecting Python root... /Library/Frameworks/Python.framework/Versions/3.7
> Unicode/ICU support for Boost.Regex?... not found.
> Backing up existing Boost.Build configuration in project-config.jam.1
> Generating Boost.Build configuration in project-config.jam for clang...
>
> Bootstrapping is done. To build, run:
>
> ./b2
>
> To generate header files, run:
>
> ./b2 headers
>
> To adjust configuration, edit 'project-config.jam'.
> Further information:
>
> - Command line help:
> ./b2 --help
>
> - Getting started guide:
> http://www.boost.org/more/getting_started/unix-variants.html
>
> - Boost.Build documentation:
> http://www.boost.org/build/
> *END OUTPUT*
>
> Then, I run
>
> sudo ./b2 --with-python
>
> However, when it builds the libraries, it saves it with a folder path
> that has 2.7, and I get files such as libboost_python27.dylib.
>
> *BEGIN OUTPUT*
> In file included from
> /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include/numpy/ufuncobject.h:327:
> *END OUTPUT*
>
> /System/Library is where the default macOS Python 2.7 is stored.
>
> How can I convince Boost to use the Python 3.7 that I installed,
> instead of the default Python 2.7? It looked like it detected it in
> bootstrap, but it doesn't use it later. Is the way that I specified
> the desired python executable correct?
>
> Any help or guidance is greatly appreciated.
>
> Thank you,
> Mortimer
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Re: [C++-sig] Boost Python Wrong Python Version macOS

2020-09-07 Thread Stefan Seefeld 

Hi Mortimer,

On 2020-09-06 12:54 p.m., Mortimer Hemmit wrote:

Hi Stefan,

Apologies for breaking the reply chain; I wasn't subscribed to the
list earlier, so this is the only message I could reply to. Now I
should be able to reply to other messages.

Thanks for your email. I don't think that ./b2 has the option to
specify the python version within --with-python - I think only
./bootstrap does. When I tried

./b2 --with-python=3.7

I got;

*BEGIN OUTPUT*
error: wrong library name 'python=3.7' in the --with- option.
*END OUTPUT*

Then, I tried invoking ./b2 with option python=3.7.

sudo ./b2 python=3.7 --with-python

*BEGIN OUTPUT*
/Users/Mort/Downloads/boost_1_74_0/tools/build/src/build/feature.jam:491:
in feature.validate-value-string from module feature
error: "3.7" is not a known value of feature 
error: legal values: "2.7"


you are entirely right, there is no `--with-python` option to `b2`. 
Sorry for sending you down a wrong route.


I think what you need is described in 
https://www.boost.org/doc/libs/1_74_0/libs/python/doc/html/building/configuring_boost_build.html


Create a ~/user-config.jam file containing the line "using python : 3.7 ;"

This informs Boost.Build of the availability of that Python version 
(depending on your system you may want to add more parameters to specify 
paths, library name, etc.). You could define multiple versions (one per 
line), in which case the option `./b2 python=` will 
allow you to select one.


Hope this helps,

Stefan
--

  ...ich hab' noch einen Koffer in Berlin...

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