我不会安装这个gem,我得到了这样的响应。Building native extensions. This could take a while...ERROR: Failed to build gem native extension.
checking for main() in -lssl...
我正在尝试使用gcov on Linux(Ubuntu)来查看每一行源代码的执行频率。我在我的gcc编译器和链接器标志中添加了以下标志,LDFLAGS = -fprofile-arcs -lgcovgcov --object-directory <path to the *.gcno/*.gcda files> myfile.cpp myf