今天在linux装Qt库时，出现了：
error： zlib.h:no such file or directory
去看了下出错的文件，里面这么一句#include
没这头文件？那就给它呗。
然后去搜索了下zlib.h，发现是属于zlib的。
去下个zlib。
zlib地址：http://www.zlib.net/
然后zlib标准安装指导：
zlib library files are placed into /usr/local/lib and zlib header files are placed into /usr/local/include, by default.
build static libraries
.../zlib-1.2.1]# ./configure
.../zlib-1.2.1]# make test
.../zlib-1.2.1]# make install
build shared libraries
.../zlib-1.2.1]# make clean
.../zlib-1.2.1]# ./configure --shared
.../zlib-1.2.1]# make test
.../zlib-1.2.1]# make install
.../zlib-1.2.1]# cp zutil.h /usr/local/include
.../zlib-1.2.1]# cp zutil.c /usr/local/include
/usr/local/lib should now contain...
libz.a
libz.so -> libz.so.1.2.1
libz.so.1 -> libz.so.1.2.1
libz.so.1.2.1
/usr/local/include should now contain...
zconf.h
zlib.h
zutil.h
可选择的zlib非标准安装指导：
create the directory that will contain zlib
.../zlib-1.2.1]# mkdir /usr/local/zlib
follow the given procedure above, except
.../zlib-1.2.1]# ./configure --prefix=/usr/local/zlib
更新软连接：update the run-time linker
/etc/ld.so.cache will need to be updated with the new zlib shared lib: libz.so.1.2.1
for standard zlib installation...
add /usr/local/lib to /etc/ld.so.conf, if specified path is not present
/etc]# ldconfig
if zlib was installed with a prefix...
add /usr/local/zlib/lib to /etc/ld.so.conf
/etc]# ldconfig
再装，ok了。