message: Fix build on non-Linux glibc-based systems
  dl functions are provided by all glibc-based systems (GNU/Linux, but
  also GNU/Hurd, GNU/kFreeBSD)
diff: @@ -21,7 +21,7 @@ using namespace std;
  #if defined(_WIN32)
  #include <windows.h>
  -#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
  +#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__GLIBC__)
  #include <dlfcn.h>
  #endif
  @@ -77,7 +77,7 @@ void* getSymbol_(LibHandle_t h, const char* symbolName)
  {
  #if defined(_WIN32)
  return (void*)GetProcAddress(h, symbolName);
  -#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
  +#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__GLIBC__)
  return dlsym(h, symbolName);
  #endif
  }
  @@ -91,7 +91,7 @@ LibHandle_t libraryLoad_(const FileSystemPath_t& filename)
  # else
  return LoadLibraryW(filename.c_str());
  #endif
  -#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
  +#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__GLIBC__)
  return dlopen(filename.c_str(), RTLD_LAZY);
  #endif
  }
  @@ -101,7 +101,7 @@ void libraryRelease_(LibHandle_t h)
  {
  #if defined(_WIN32)
  FreeLibrary(h);
  -#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
  +#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__GLIBC__)
  dlclose(h);
  #endif
  }
  