编译libc执行configure时遇到如下问题:
LD_LIBRARY_PATH shouldn't contain the current directory
执行指令：echo $LD_LIBRARY_PATH，发现并没有指定当前目录。
打开configure文件，查找LD_LIBRARY_PATH，找到如下内容：
# Test if LD_LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LD_LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
因为在环境变量的最前和最后均有一个“:”，程序将此分隔符解释为当前目录了。
解决方法：
执行指令：vi ~/.bash_profile
将LD_LIBRARY_PATH环境变量的形如和末尾的“:”去掉，保存。
执行指令：source ~/.bash_profile