Re: configure checks for python3-notmuch2 module

Subject: Re: configure checks for python3-notmuch2 module

Date: Mon, 12 Jul 2021 09:14:00 +0200

To: David Bremner,


From: Michael J Gruber

David Bremner venit, vidit, dixit 2021-07-11 23:29:57:
> It turns out we need pyconfig.h to build the (new) python bindings.  I
> don't think this is adequately checked for by the configure script,
> since I had a Fedora user report a build failure (during make install,
> which I found odd) missing pyconfig.h
> On Debian this is on libpython3.x-dev, which is not a dependency of the
> python3-cffi package.

You need python3-cffi to run python code which uses cffi bindings -
think of it as the "lib" part. You need the devel package to generate a
python module using cffi (i.e. binding for a specific c library).

So, it makes sense for the lib package not to depend on the devel
package (which is python3-devel on Fedora).

I can't help with adapting configure to the header requirement, though.


> log follows.
> ----------------------------------------------------------------------
> cd bindings/python-cffi && \
>         python3 build --build-lib build/stage && \
>         mkdir -p build/stage/tests && cp tests/*.py build/stage/tests
> running build
> running build_py
> running build_ext
> generating cffi module 'build/temp.linux-x86_64-3.9/notmuch2._capi.c'
> creating build/temp.linux-x86_64-3.9
> building 'notmuch2._capi' extension
> creating build/temp.linux-x86_64-3.9/build
> creating build/temp.linux-x86_64-3.9/build/temp.linux-x86_64-3.9
> gcc -pthread -Wno-unused-result -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -fPIC -I../../lib -I/usr/include/python3.9 -c build/temp.linux-x86_64-3.9/notmuch2._capi.c -o bui
>  ld/temp.linux-x86_64-3.9/build/temp.linux-x86_64-3.9/notmuch2._capi.o
> build/temp.linux-x86_64-3.9/notmuch2._capi.c:50:14: fatal error: pyconfig.h: No such file or directory
>    50 | #    include <pyconfig.h>
>       |              ^~~~~~~~~~~~
> compilation terminated.
> error: command '/usr/bin/gcc' failed with exit code 1
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