<1>: ERROR: checking for C compiler default output... configure: error:
C compiler cannot create executables
$sudo apt-get install libc6-dev
<2>: ERROR: configure: error: C++ preprocessor "/lib/cpp" fails sanity check
$sudo apt-get install cpp g++
<3>: ERROR: checking for termcap functions library... configure: error:
No curses/termcap library found
$sudo apt-get install termcap-compat
$sudo apt-get install gcc cpp g++ libncurses5-dev
$sudo apt-get install make autoconf automake libtool
<4>: ERROR: This is a linux system and Linuxthreads was not
found. On linux Linuxthreads should be used. Please install Linuxthreads
(or a new glibc) and try again
#echo '/* Linuxthreads */' >> /usr/include/pthread.h
(注意上面的ERROR<4>可以看出系统缺少线程库
没有线程，Linux当然不行，既然没有linuxthread那用什么代替呢？
是新型的NPTL，因为NPTL（native posix thread library）与 LinuxThreads 相比，NPTL 具有更多 的优点，只不过我们这里先不讨论他的优点。
