安装时，make总是有如下错误，最后几行

/bin/sh ./libtool  --tag=CC   --mode=link gcc -std=gnu99  -g -O2 -Wall -pthread -ldl -L/usr/lib -L/usr/lib -ldl -L/usr/lib -L/usr/lib -o utilities/gm utilities/gm.o magick/libGraphicsMagick.la

libtool: link: gcc -std=gnu99 -g -O2 -Wall -pthread -o utilities/.libs/gm utilities/gm.o  -L/usr/lib magick/.libs/libGraphicsMagick.so -ldl -ltiff -lfreetype -ljpeg -lpng12 -lwmflite -lXext -lX11 -lbz2 -lxml2 -lz -lm -lpthread -pthread -Wl,-rpath -Wl,/usr/local/magick/lib

magick/.libs/libGraphicsMagick.so: undefined reference to `gzopen64'

magick/.libs/libGraphicsMagick.so: undefined reference to `gzseek64'

magick/.libs/libGraphicsMagick.so: undefined reference to `gztell64'

collect2: ld returned  exit status

make[]: *** [utilities/gm] Error

make[]: Leaving directory `/home/wuyue/soft/GraphicsMagick-1.3.'

make: *** [all] Error 

#cd zlib-1.2.

#CFLAGS="-O3 -fPIC" ./configure --prefix=/usr/local/zlib/

#make

# make install

#cp   /usr/local/zlib/lib/libz.so.1.2.  /usr/lib/

#unlink /usr/lib/libz.so

#link /usr/lib/libz.so.1.2. /usr/lib/libz.so

 ...

 ....

#cd GraphicsMagick-1.3.

#./configure

#make

#make install

gm: /lib/libz.so.: version `ZLIB_1.2.3.' not found (required by gm)

[root@localhost GraphicsMagick-1.3.24]# cp /usr/local/lib/libz.so.1 /lib/
cp：是否覆盖"/lib/libz.so.1"？ y

[root@localhost GraphicsMagick-1.3.]# gm -version

GraphicsMagick 1.3. -- Q8 http://www.GraphicsMagick.org/

Copyright (C) - GraphicsMagick Group.

Additional copyrights and licenses apply to this software.

See http://www.GraphicsMagick.org/www/Copyright.html for details.

Feature Support:

  Native Thread Safe       yes

  Large Files (>  bit)   yes

  Large Memory (>  bit)  no

  BZIP                     yes

  DPS                      no

  FlashPix                 no

  FreeType                 yes

  Ghostscript (Library)    no

  JBIG                     no

  JPEG-                yes

  JPEG                     yes

  Little CMS               no

  Loadable Modules         no

  OpenMP                   yes ()

  PNG                      yes

  TIFF                     yes

  TRIO                     no

  UMEM                     no

  WebP                     no

  WMF                      no

  X11                      yes

  XML                      yes

  ZLIB                     yes