Description
| Bugzilla Link | 19333 |
| Version | trunk |
| OS | All |
| Reporter | LLVM Bugzilla Contributor |
| CC | @tstellar |
Extended Description
This doesn't apply to Windows because by default symbols are hidden in DLLs. On Unix like systems like Linux and Mac though there are a bunch of symbols exported that shouldn't be which increase startup time. There is a long and annoying process of marking symbols to export for the libraries but for the executables (which obviously shouldn't export any symbols unless they have a plugin system) the flag -fvisibility=hidden should be a cheap and easy optimization. Note that LLVM does not use runtime type information or exceptions so I believe there shouldn't be very many problems however, according to http://gcc.gnu.org/wiki/Visibility there also some other cases (for example, static data members of templates that can cause this problem). Using #pragma push for one's own code could be one way of quickly accomplishing this.