[Bug 1717013] New: blender fails to build with Python 3.8

https://bugzilla.redhat.com/show_bug.cgi?id=1717013

            Bug ID: 1717013
           Summary: blender fails to build with Python 3.8
           Product: Fedora
           Version: rawhide
            Status: NEW
         Component: blender
          Severity: high
          Assignee: luya_tfz(a)thefinalzone.net
          Reporter: mhroncok(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: design-devel(a)lists.fedoraproject.org,
                    kwizart(a)gmail.com, luya_tfz(a)thefinalzone.net,
                    negativo17(a)gmail.com, promac(a)gmail.com
            Blocks: 1686977 (PYTHON38)
  Target Milestone: ---
    Classification: Fedora



bledner 1:2.79b-17.fc30 fails to build with Python 3.8.0a4+,

[ 71%] Building C object
source/blender/python/intern/CMakeFiles/bf_python.dir/gpu.c.o
cd /builddir/build/BUILD/blender-2.79b/cmake-make/source/blender/python/intern
&& /usr/bin/cc -DBUILD_DATE -DNDEBUG -DWITH_ALEMBIC -DWITH_AUDASPACE -DWITH_AVI
-DWITH_BULLET -DWITH_CINEON -DWITH_COLLADA -DWITH_COMPOSITOR -DWITH_CYCLES
-DWITH_DDS -DWITH_FRAMESERVER -DWITH_FREESTYLE -DWITH_GAMEENGINE -DWITH_GLU
-DWITH_GL_PROFILE_COMPAT -DWITH_HDR -DWITH_INPUT_NDOF -DWITH_INTERNATIONAL
-DWITH_JACK -DWITH_LIBMV -DWITH_MOD_BOOLEAN -DWITH_MOD_FLUID -DWITH_MOD_REMESH
-DWITH_OCEANSIM -DWITH_OCIO -DWITH_OPENAL -DWITH_OPENEXR -DWITH_OPENIMAGEIO
-DWITH_OPENJPEG -DWITH_PLAYER -DWITH_PYTHON_SAFETY -DWITH_SDL -DWITH_SMOKE
-DWITH_SNDFILE -DWITH_TIFF -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
-D_LARGEFILE_SOURCE -D__LITTLE_ENDIAN__ -D__MMX__ -D__SSE2__ -D__SSE__
-I/builddir/build/BUILD/blender-2.79b/source/blender/python
-I/builddir/build/BUILD/blender-2.79b/source/blender/blenkernel
-I/builddir/build/BUILD/blender-2.79b/source/blender/blenlib
-I/builddir/build/BUILD/blender-2.79b/source/blender/blenloader
-I/builddir/build/BUILD/blender-2.79b/source/blender/blentranslation
-I/builddir/build/BUILD/blender-2.79b/source/blender/editors/include
-I/builddir/build/BUILD/blender-2.79b/source/blender/gpu
-I/builddir/build/BUILD/blender-2.79b/source/blender/imbuf
-I/builddir/build/BUILD/blender-2.79b/source/blender/makesdna
-I/builddir/build/BUILD/blender-2.79b/source/blender/makesrna
-I/builddir/build/BUILD/blender-2.79b/source/blender/windowmanager
-I/builddir/build/BUILD/blender-2.79b/intern/cycles/blender
-I/builddir/build/BUILD/blender-2.79b/intern/opencolorio
-I/builddir/build/BUILD/blender-2.79b/intern/guardedalloc
-I/builddir/build/BUILD/blender-2.79b/source/blender/freestyle/intern/python
-I/builddir/build/BUILD/blender-2.79b/source/blender/alembic
-I/builddir/build/BUILD/blender-2.79b/source/blender/imbuf/intern/oiio -isystem
/usr/include/python3.8 -isystem /usr/include/SDL2  -Wall -Wcast-align
-Werror=implicit-function-declaration -Werror=return-type -Werror=vla
-Wstrict-prototypes -Wmissing-prototypes -Wno-char-subscripts
-Wno-unknown-pragmas -Wpointer-arith -Wunused-parameter -Wwrite-strings
-Wlogical-op -Wundef -Winit-self -Wnonnull -Wmissing-include-dirs
-Wno-div-by-zero -Wtype-limits -Wformat-signedness -Wuninitialized
-Wredundant-decls -Wshadow -Wno-error=unused-but-set-variable
-Wimplicit-fallthrough=5 -O2 -g -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions
-fstack-protector-strong -grecord-gcc-switches
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection
-fuse-ld=gold -fopenmp -std=gnu11   -msse -pipe -fPIC -funsigned-char
-fno-strict-aliasing -msse2 -DNDEBUG   -o CMakeFiles/bf_python.dir/gpu.c.o   -c
/builddir/build/BUILD/blender-2.79b/source/blender/python/intern/gpu.c
/builddir/build/BUILD/blender-2.79b/source/blender/python/intern/gpu.c: In
function 'GPU_initPython':
/builddir/build/BUILD/blender-2.79b/source/blender/python/intern/gpu.c:326:53:
error: dereferencing pointer to incomplete type 'PyInterpreterState' {aka
'struct _is'}
  326 |  PyObject *sys_modules = PyThreadState_GET()->interp->modules;
      |                                                     ^~
make[2]: ***
[source/blender/python/intern/CMakeFiles/bf_python.dir/build.make:66:
source/blender/python/intern/CMakeFiles/bf_python.dir/gpu.c.o] Error 1
make[2]: Leaving directory '/builddir/build/BUILD/blender-2.79b/cmake-make'
make[1]: *** [CMakeFiles/Makefile2:6532:
source/blender/python/intern/CMakeFiles/bf_python.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
make[2]: Entering directory '/builddir/build/BUILD/blender-2.79b/cmake-make'

I've seen this error fixed in another project(s) before, will just need to
remember where.

Logs and mock config at:

https://copr.fedorainfracloud.org/coprs/g/python/python3.8/package/blender/
https://copr.fedorainfracloud.org/coprs/g/python/python3.8/


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1686977
[Bug 1686977] Python 3.8
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