[CMake] --sphinx-qthelp leads to build error with CMake 3.2.3

[René J.V. Bertin]

Hi,

I'm trying to build the latest CMake release, with the Qt4 gui and including the docs in Qt help format. I'm using the same "recipe" as for the 3.2.2 release, but now I see this:

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[ 95%] sphinx-build qthelp: see Utilities/Sphinx/build-qthelp.log
cd /build//cmake-3.2.3/Utilities/Sphinx && /opt/local/bin/sphinx-build-3.4 -c /build//cmake-3.2.3/Utilities/Sphinx -d /build//cmake-3.2.3/Utilities/Sphinx/doctrees -b qthelp /build//cmake-3.2.3/Help /build//cmake-3.2.3/Utilities/Sphinx/qthelp > build-qthelp.log
WARNING: 'default' html theme has been renamed to 'classic'. Please change your html_theme setting either to the new 'alabaster' default theme, or to 'classic' to keep using the old default.
cd /build//cmake-3.2.3/Utilities/Sphinx && ../../Bootstrap.cmk/cmake -DCSS_DIR=/build//cmake-3.2.3/Utilities/Sphinx/qthelp/_static -P /build//cmake-3.2.3/Utilities/Sphinx/apply_qthelp_css_workaround.cmake
CMake Error at apply_qthelp_css_workaround.cmake:4 (file):
  file failed to open for reading (No such file or directory):

    /build//cmake-3.2.3/Utilities/Sphinx/qthelp/_static/default.css


Utilities/Sphinx/CMakeFiles/documentation.dir/build.make:63: recipe for target 'Utilities/Sphinx/doc_format_qthelp' failed
make[2]: *** [Utilities/Sphinx/doc_format_qthelp] Error 1
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I cannot vouch that the WARNING wasn't already there last time, but the fact that a file called default.css is missing while there is a classic.css might be significant.

I've google the error a bit, but so far haven't found anything relevant AND recent.

Thanks,
René