warning: left shift count >= width of type

[raul-klg]

Hello:
After fixing #3 (thanks for that), I'm now noticing the subject warning:

../../../inc/CRC.h:753:52: warning: left shift count >= width of type [-Wshift-count-overflow]
         remainder = static_cast<CRCType>(remainder << SHIFT);

In order to reproduce I clone and update to HEAD (7421f32). I then go to test/prj/gcc and finally I issue make.
I'm on debian stretch and gcc version is:

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-18+deb9u1' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --program-prefix=x86_64-linux-gnu- --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 --enable-default-pie --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --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 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)

build.log

[d-bahr]

Weird, this only happens with GCC 6, but GCC 7 compiles without errors. The BoundedConstexprValue function should trap these errors, but maybe there's something odd with how GCC 6 handles constexpr functions.

Try HEAD now (534c1d8) and let me know if you still have any issues.

[d-bahr]

Note to self, this probably should be fixed by properly supporting SFINAE but getting cross-compilation support with SFINAE is probably pretty painful.

[d-bahr]

Ticket has been idle for a while, a fix has been committed, so I'm going to close this issue.