id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,port 50440,qt5-qtbase: libc++ under Lion,ctreleaven,MarcusCalhoun-Lopez,"I'm trying to install qt5-qtwebkit on Lion using XCode 4.6.3. First time around, I got all the pre-requisites installed but qt5-qtwebkit errored out insisting that libc++ was required. It pointed to and I followed the direction to build EVERYTHING with libc++: https://trac.macports.org/wiki/LibcxxOnOlderSystems This build errored out at qt5-qtbase with numerous errors like: {{{ :info:build In file included from ../../corelib/tools/qstring_mac.mm:34: :info:build ../../corelib/tools/qstring.h:739:55: error: no type named 'u16string' in namespace 'std' :info:build static inline QString fromStdU16String(const std::u16string &s); :info:build ~~~~~^ }}} I believe this means that there is a problem with the c++ library? Note that just prior to the failure, the Configuration Report says: {{{ :info:configure Build options: :info:configure Configuration .......... accessibility audio-backend avx avx2 c++11 compile_examples concurrent corewlan cups dbus dbus-linked fontconfig full-config getaddrinfo getifaddrs glib iconv icu ipv6ifname large-config largefile medium-config minimal-config nis opengl openssl-linked png qpa qpa qt_framework reduce_exports release shared small-config sse2 sse3 sse4_1 sse4_2 ssse3 system-freetype system-harfbuzz system-jpeg system-png system-zlib xrender :info:configure Build parts ............ libs tools :info:configure Mode ................... release :info:configure Using sanitizer(s)...... none :info:configure Using C++11 ............ yes ... }}} I found a similar-looking report on the web but don't see how to implement the solution (second last posting): https://forum.qt.io/topic/56064/solved-problem-with-qt-5-5/11 Will attach main log. ",defect,closed,Normal,,ports,2.3.4,fixed,,Lord-Kamina,qt5-qtbase