Turns out we have three instances of the same link in our libstdc++ documentation -- do we really need all of those?
In any case, I went ahead and applied this straightforward update. Gerald 2019-10-26 Gerald Pfeifer <ger...@pfeifer.com> * doc/xml/manual/codecvt.xml: Switch pubs.opengroup.org to https. * doc/xml/manual/locale.xml (LC_ALL): Ditto. * doc/xml/manual/messages.xml: Ditto. Index: libstdc++-v3/doc/xml/manual/codecvt.xml =================================================================== --- libstdc++-v3/doc/xml/manual/codecvt.xml (revision 277475) +++ libstdc++-v3/doc/xml/manual/codecvt.xml (working copy) @@ -595,7 +595,7 @@ codecvt usage. <biblioentry> <title> <link xmlns:xlink="http://www.w3.org/1999/xlink" - xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/"> + xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/"> System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008) </link> </title> Index: libstdc++-v3/doc/xml/manual/locale.xml =================================================================== --- libstdc++-v3/doc/xml/manual/locale.xml (revision 277475) +++ libstdc++-v3/doc/xml/manual/locale.xml (working copy) @@ -560,7 +560,7 @@ global locale" (emphasis Paolo), that is: <biblioentry> <title> <link xmlns:xlink="http://www.w3.org/1999/xlink" - xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/"> + xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/"> System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008) </link> </title> Index: libstdc++-v3/doc/xml/manual/messages.xml =================================================================== --- libstdc++-v3/doc/xml/manual/messages.xml (revision 277475) +++ libstdc++-v3/doc/xml/manual/messages.xml (working copy) @@ -488,7 +488,7 @@ void test01() <biblioentry> <title> <link xmlns:xlink="http://www.w3.org/1999/xlink" - xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/"> + xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/"> System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008) </link> </title>