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-rw-r--r--doc/README.md9
-rw-r--r--doc/sphinx/changes.rst10
2 files changed, 13 insertions, 6 deletions
diff --git a/doc/README.md b/doc/README.md
index e3ab5ae4d2..99d285320d 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -28,9 +28,10 @@ Dependencies
To produce the complete documentation in HTML, you will need Coq dependencies
listed in [`INSTALL.md`](../INSTALL.md). Additionally, the Sphinx-based
-reference manual requires Python 3, and the following Python packages:
+reference manual requires Python 3, and the following Python packages
+(note the version constraints on Sphinx):
- - sphinx >= 2.3.1
+ - sphinx >= 2.3.1 & < 3.0.0
- sphinx_rtd_theme >= 0.4.3
- beautifulsoup4 >= 4.0.6
- antlr4-python3-runtime >= 4.7.1
@@ -40,8 +41,8 @@ reference manual requires Python 3, and the following Python packages:
To install them, you should first install pip and setuptools (for instance,
with `apt install python3-pip python3-setuptools` on Debian / Ubuntu) then run:
- pip3 install sphinx sphinx_rtd_theme beautifulsoup4 antlr4-python3-runtime \
- pexpect sphinxcontrib-bibtex
+ pip3 install sphinx==2.3.1 sphinx_rtd_theme beautifulsoup4 \
+ antlr4-python3-runtime==4.7.1 pexpect sphinxcontrib-bibtex
Nix users should get the correct development environment to build the
HTML documentation from Coq's [`default.nix`](../default.nix) (note this
diff --git a/doc/sphinx/changes.rst b/doc/sphinx/changes.rst
index 72f0fdf4c5..68ab36a5ff 100644
--- a/doc/sphinx/changes.rst
+++ b/doc/sphinx/changes.rst
@@ -970,8 +970,14 @@ Infrastructure and dependencies
- **Changed:**
Minimal versions of dependencies for building the reference manual:
- now requires Sphinx 2.3.1+, sphinx_rtd_theme 0.4.3+ and
- sphinxcontrib-bibtex 0.4.2+
+ now requires Sphinx >= 2.3.1 & < 3.0.0, sphinx_rtd_theme 0.4.3+ and
+ sphinxcontrib-bibtex 0.4.2+.
+
+ .. warning::
+
+ The reference manual is known not to build properly with
+ Sphinx 3.
+
(`#12224 <https://github.com/coq/coq/pull/12224>`_,
by Jim Fehrle and Théo Zimmermann).
- **Removed:**