+ cp -a gcc/libgccjit.so gcc/libgccjit.so.0 gcc/libgccjit.so.0.0.1 ../gcc/
+ cd ../gcc/
+ ln -sf xgcc x86_64-redhat-linux-gcc-13
+ cp -a Makefile Makefile.orig
+ sed -i -e '/^CHECK_TARGETS/s/$/ check-jit/' Makefile
+ touch -r Makefile.orig Makefile
+ rm Makefile.orig
+ make jit.sphinx.html
/bin/sh ../../gcc/../mkinstalldirs jit/sphinx-build
mkdir -p -- jit/sphinx-build
(cd ../../gcc/jit/docs && \
  make html BUILDDIR=/root/rpmbuild/BUILD/gcc-13.1.1-20230426/obj-x86_64-redhat-linux/gcc/jit/sphinx-build )
make[1]: Entering directory '/root/rpmbuild/BUILD/gcc-13.1.1-20230426/gcc/jit/docs'
sphinx-build -b html -d /root/rpmbuild/BUILD/gcc-13.1.1-20230426/obj-x86_64-redhat-linux/gcc/jit/sphinx-build/doctrees   . /root/rpmbuild/BUILD/gcc-13.1.1-20230426/obj-x86_64-redhat-linux/gcc/jit/sphinx-build/html
Running Sphinx v1.7.6

Sphinx version error:
This project needs at least Sphinx v3.0 and therefore cannot be built with this version.

# rpm -q python3-sphinx
python3-sphinx-1.7.6-3.el8.noarch


This was possible in gcc-toolset-12.