Making it all talk to each other
- • C
- • C++
- • Shared Libraries
- • ELF
- • runtime linker
No Function-scoped Static Objects
void example() {
static std::string str;
}
gcc 3.x has -fuse-cxa-atexit and your libc needs to support __cxa_atexit() in
order to solve this problem. Other than that, if you can't change the code, patch PHP
to not dlclose() the shared extensions on shutdown to avoid the crash.
See http://lerdorf.com/dlclose.txt for the patch.
Throwing C++ exceptions
If a C++ shared library is loaded by a C runtime, like PHP, you could end up with weird
__throw() problems. An annoying workaround is to link your C runtime against libstdc++.so
to prevent the linker from pulling in the __throw symbol from libgcc.a.
