* gnu/packages/patches/gcc-13.2.0-libstdc++-docbook-xsl-uri.patch: New file.
* gnu/packages/patches/gcc-13.2.0-libstdc++-info-install-fix.patch: Ditto.
* gnu/packages/patches/gcc-5.5.0-libstdc++-xmlcatalog.patch: Ditto.
* gnu/local.mk: Register them.
* gnu/packages/gcc.scm
(gcc-5)[source]: Use gcc-5.5.0-libstdc++-xmlcatalog.patch,
gcc-13.2.0-libstdc++-docbook-xsl-uri.patch and
gcc-13.2.0-libstdc++-info-install-fix.patch.
(gcc-9)[source]: Use gcc-13.2.0-libstdc++-docbook-xsl-uri.patch and
gcc-13.2.0-libstdc++-info-install-fix.patch.
(make-libstdc++-doc)[arguments]<#:phases>: Remove 'set-xsl-directory.
Adjust 'build and 'install for info documentation and to respect make-flags.
[native-inputs]: Add docbook2x.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Change-Id: Ie3b9de0328a10efadb28d211c3fe03f9b7aaf87f
