Missing "-std=c++11" flag and "std::(f)abs" (mis)usage.

[JacekHoleczek]

The output from "qcdloop-config --cppflags" does NOT contain "-std=c++11", even though this flag is badly needed. Please fix it.

On this occasion, I would also like to ask you to improve the "qcdloop/maths.h" file a bit. Instead of:
inline double Abs(complex const& x) { return std::fabs(x);}
please use:
inline double Abs(complex const& x) { return std::abs(x);}

[scarrazza]

Thanks for pointing out this issue, I hope this is fixed in #12.

[JacekHoleczek]

Hi, thanks. I think maybe one should also use "std::abs" instead of "std::fabs" in: inline double Abs(double const& x) { return std::fabs(x); } I would also like to ask you to add a "fix" which I mentioned in another issue (badly needed on "CentOS" and related systems): sed -i -e '{s#/usr/lib/gcc/x86_64-linux-gnu/\*#& /usr/lib/gcc/x86_64-redhat-linux/\*#}' CMakeLists.txt It adds the "/usr/lib/gcc/x86_64-redhat-linux/*" entry to the "PATHS" in the "QUADMATH_LIBRARY" search (in "CMakeLists.txt"). Thanks ni advance, Best regards, Jacek.