ci: Try other way to switch branch and add python env wrapper.

.gitlab-ci.yml

@@ -16,8 +16,8 @@ build:
     - linux
   script:
     - cd cpython
-    - git branch 3.10
-    - git checkout 3.10
+    - git fetch origin
+    - git switch 3.10
     - ./configure --enable-optimizations --with-lto --enable-shared --with-system-expat --with-system-ffi --with-ensurepip=install --with-computed-gotos --prefix=$(pwd)/../dist/ --disable-test-modules
     - make -j18 all
     - make install

python

+#!/bin/sh
+
+export LD_LIBRARY_PATH=$PWD/lib:$LD_LIBRARY_PATH
+export PKG_CONFIG_PATH=$PWD/lib/pkgconfig:$PKG_CONFIG_PATH
+export C_INCLUDE_PATH=$PWD/include/python3.10:$C_INCLUDE_PATH
+export CPLUS_INCLUDE_PATH=$PWD/include/python3.10:$CPLUS_INCLUDE_PATH
+
+./bin/python3 $@