这个警告是关于什么的?它似乎在警告内置插件中的 long long 常量。这是来自 GCC 版本 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)。
In file included from ../include/log4cplus/helpers/stringhelper.h:36:0,
from ../tests/performance_test/main.cxx:6:
<built-in>:1:2: warning: use of C++0x long long integer constant [-Wlong-long]