LINUX下安装pcre出现WARNING: 'aclocal-1.15' is missing on your system错误的解决办法

wget https://ftp.gnu.org/gnu/automake/automake-1.15.tar.gz

tar -xzvf automake-1.15.tar.gz

$ cd automake-1.15
$ ./configure  --prefix=安装目录
$ make
$ sudo mkdir -p /opt
$ sudo make install

export PATH=/opt/aclocal-1.15/bin:$PATH

aclocal --version