[MacPorts] #61518: qt4-mac @4.8.7 fails to install on mac OS 11.0.1

[MacPorts]

#61518: qt4-mac @4.8.7 fails to install on mac OS 11.0.1
----------------------------+--------------------
 Reporter:  sudheerhebbale  |      Owner:  (none)
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:
 Keywords:                  |       Port:
----------------------------+--------------------
 While trying to install qt4-mac after OS upgrade and port upgrade, the
 installation fails with the following. errot

 Error: Failed to configure qt4-mac: configure failure: command execution
 failed

 The log is as follows


 :info:configure /usr/bin/clang++ -c -o makefile.o -arch x86_64
 -stdlib=libc++ -pipe -DQMAKE_OPENSOURCE_EDITION -fconstant-cfstrings -
 isysroot
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
 -g -I. -Igenerators -         Igenerators/unix -Igenerators/win32
 -Igenerators/mac -Igenerators/symbian -Igenerators/integrity
 -I/opt/local/var/macports/build/
 _opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work
 /qt-everywhere-opensource-src-4.8.7/include
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work
 /qt-everywhere-opensource-src-4.8.7/include/QtCore
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.
 macports.org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work/qt-
 everywhere-opensource-src-4.8.7/src/corelib/global
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work/qt-
 everywhere-opensource-src-4.8.7/src/corelib/xml
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.
 org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work/qt-
 everywhere-opensource-src-4.8.7/tools/shared -DQT_NO_PCRE -
 DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQLIBRARYINFO_EPOCROOT
 -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -
 DQT_NO_COMPRESS
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.
 org_macports_release_tarballs_ports_aqua_qt4-mac/qt4-mac/work/qt-
 everywhere-opensource-src-4.8.7/mkspecs/macx-g++ -DHAVE_QCONFIG_CPP -
 DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT -DQT_NO_DEPRECATED
 generators/makefile.cpp
 :info:configure clang: error: invalid deployment target for -stdlib=libc++
 (requires OS X 10.7 or later)
 :info:configure clang: error: invalid deployment target for -stdlib=libc++
 (requires OS X 10.7 or later)
 :info:configure clang: error: invalid deployment target for -stdlib=libc++
 (requires OS X 10.7 or later)
 :info:configure gmake: *** [Makefile:287: makefile.o] Error 1
 :info:configure gmake: *** Waiting for unfinished jobs....
 :info:configure gmake: *** [Makefile:263: property.o] Error 1
 :info:configure gmake: *** [Makefile:260: project.o] Error 1

-- 
Ticket URL: <https://trac.macports.org/ticket/61518>
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