不同操作系统编译C++静态库的推荐？

Question

Let's say I use CentOS 7 and GCC 7 to compile a static library (let's call it mylib.a) and I would like to use it (compiled against) on CentOS 6 (with older system libraries).

What's the best way to do so? Static linking to libstdc++, etc? What else?

Currently, I am getting something like this when I built (with gcc 4.x on CentOS 6) an executable against my static library mylib.a:

/opt/boost/boost/date_time/gregorian/gregorian_io.hpp:62: undefined reference to `operator delete(void*, unsigned long)'
mylib.a([myFile].o): In function `std::locale::locale<boost::date_time::date_facet<boost::gregorian::date, char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&, boost::date_time::date_facet<boost::gregorian::date, char, std::ostreambuf_iterator<char, std::char_traits<char> > >*)':
/opt/rh/devtoolset-7/root/usr/include/c++/7/bits/locale_classes.tcc:47: undefined reference to `operator delete(void*, unsigned long)'

I suspect that it is because boost_date_time.a wasn't built against libstdc++.a when it was built with gcc 4.x on CentOS 7 without the latest dev tool.

Thought?

Thanks!

Answer 1

Build on the oldest supported system - that way it usually works on Linux. Newer versions of gcc and libstdc++ is usually compatible with older ones.

Answer 2

You can have a try with Musl , the static linked c library, then build your program with all static libraries include libc and libstdc++, it's a universal Linux executable program.

The Alpine disto has shipped Musl as the default libc library, so I suggest you use a docker image with alpine to build your program with CI/CD pipeline.

But be aware there are some trivial differences between glibc and musl, you may need to change your program to make it musl compatible