[Interest] mkspecs/features/qt_common.prf

[Igor Mironchik]

Hello,

Building Qt 3D Studio...

At the beginning got:

Unknown options for g++ -Wshift-overflow=2 -Wduplicated-cond

I'm on Ubuntu 16.04

gcc -v

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 
5.4.0-6ubuntu1~16.04.5' 
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs 
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ 
--prefix=/usr --program-suffix=-5 --enable-shared 
--enable-linker-build-id --libexecdir=/usr/lib 
--without-included-gettext --enable-threads=posix --libdir=/usr/lib 
--enable-nls --with-sysroot=/ --enable-clocale=gnu 
--enable-libstdcxx-debug --enable-libstdcxx-time=yes 
--with-default-libstdcxx-abi=new --enable-gnu-unique-object 
--disable-vtable-verify --enable-libmpx --enable-plugin 
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk 
--enable-gtk-cairo 
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre 
--enable-java-home 
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 
--with-arch-directory=amd64 
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc 
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic 
--enable-checking=release --build=x86_64-linux-gnu 
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5)

In mkspecs/features/qt_common.prf I had to comment 
greaterThan(QT_GCC_MAJOR_VERSION, 5)...

clang {
     # Clang 3.5 introduced -Wdate-time
     # The conditional assumes we aren't compiling against Clang 2.x anymore
     greaterThan(QT_CLANG_MAJOR_VERSION, 
3)|greaterThan(QT_CLANG_MINOR_VERSION, 4): \
         QMAKE_CXXFLAGS_WARN_ON += -Wdate-time
} else: gcc:!intel_icc {
     QMAKE_CXXFLAGS_WARN_ON += -Wvla
     # GCC 5 introduced -Wdate-time
     greaterThan(QT_GCC_MAJOR_VERSION, 4): QMAKE_CXXFLAGS_WARN_ON += 
-Wdate-time
     # GCC 6 introduced these
     # greaterThan(QT_GCC_MAJOR_VERSION, 5): QMAKE_CXXFLAGS_WARN_ON += 
-Wshift-overflow=2 -Wduplicated-cond
     # GCC 7 has a lot of false positives relating to this, so disable 
completely
     greaterThan(QT_GCC_MAJOR_VERSION, 6): QMAKE_CXXFLAGS_WARN_ON += 
-Wno-stringop-overflow
}

Is it known issue?

Thank you.