编译php7的时候老是遇到 xxx not found 的问题，这里总结一下。 首先是基本的依赖：
openssl libssl-dev make curl libcurl4-gnutls-dev libjpeg-dev libpng-dev libmcrypt-dev libreadline6 libreadline6-dev autoconf
直接apt-get或yum安装。 configure时如果遇到 xxx not found 之类的错误，对应安装相应的依赖：
bison -> bison
xml2-config -> libxml2-dev
OpenSSL -> libcurl4-openssl-dev pkg-config
BZip2 -> libbz2-dev
jpeglib.h -> libjpeg-dev
png.h -> libpng-dev
xpm.h -> libxpm-dev
freetype-config -> libfreetype6-dev
gmp.h -> libgmp-dev libgmp3-dev ln -s /usr/include/x86_64-linux-gnu/gmp.h /usr/include/gmp.h
mcrypt.h -> libmcrypt-dev
mysql -> libmysqlclient15-dev
pspell -> libpspell-dev
recode.h -> librecode-dev
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