Hi, usually I’m using the --enable-cxx11 configure option to build LyX binaries on Mac with autotools.
Today I saw a warning with lyx-2.3.0 as follows: configure: WARNING: unrecognized options: --enable-cxx11 So I tried to build w/o this option. But this leads to a configure error: configure:10942: g++ -o conftest -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//i nclude/Qt -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtCore -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtGui -I/U sers/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtWidgets -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtSvg -I/Users/Shared /LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtConcurrent -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtMacExtras -F/Users/Shared/L yX/qt-5.9.4-frameworks-cocoa-x86_64//lib -I/Users/Shared/LyX/utilities/include -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX .platform/Developer/SDKs/MacOSX10.12.sdk -arch x86_64 -mmacosx-version-min=10.7 -L/Users/Shared/LyX/utilities/lib -isysroot /Applications/Xcode.app/Co ntents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -arch x86_64 -mmacosx-version-min=10.7 conftest.cpp -lmagic -framework QtCor e -framework QtGui >&5 clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 In file included from conftest.cpp:35: /Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtCore/qglobal.h:45:12: fatal error: 'type_traits' file not found # include <type_traits> ^ 1 error generated. configure:10942: $? = 1 Back to configure with the „unrecognized“ option it works and the corresponding line in config.log is this: configure:10942: c++ -stdlib=libc++ -o conftest -std=c++14 -std=c++11 -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include -I/Users/Shared/Ly X/qt-5.9.4-frameworks-cocoa-x86_64//include/Qt -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtCore -I/Users/Shared/LyX/qt-5.9.4-framew orks-cocoa-x86_64//include/QtGui -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtWidgets -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa- x86_64//include/QtSvg -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//include/QtConcurrent -I/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64// include/QtMacExtras -F/Users/Shared/LyX/qt-5.9.4-frameworks-cocoa-x86_64//lib -I/Users/Shared/LyX/utilities/include -isysroot /Applications/Xcode.ap p/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -arch x86_64 -mmacosx-version-min=10.7 -L/Users/Shared/LyX/utilities/lib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -arch x86_64 -mmacosx-version-min=10.7 c onftest.cpp -lmagic -framework QtCore -framework QtConcurrent -framework QtSvg -framework QtWidgets -framework QtMacExtras -framework QtGui >&5 configure:10942: $? = 0 Is any other information needed to improve the situation? Stephan