佚名 通过本文向大家介绍了mapnik,mapnik下载,mapnik xml,centos7编译安装mysql,centos7编译安装lamp等相关知识,希望对您有所帮助,也希望大家多多支持微课江湖
InstallationTroubleshooting 编译安装遇到问题汇总
git clone https://github.com/mapnik/mapnik.git</div>
安装必要的依赖
yum install boost-devel postgresql-devel proj-devel proj-epsg</div>
扩展需要的依赖
yum install sqlite-devel libpng-devel libtiff-devel libjpeg-devel libicu-devel</div>
编译的时候，官方需求最少要有5GB(for g++)的内存，对于小内存的用户(我当时只有2G)可能会出现内存不够而异常退出的情况，如果出现以下状况而退出的话：
g++: internal compiler error: Killed (program cc1plus)</div>
我们可以临时增加磁盘交换空间来临时解决该问题
sudo dd if=/dev/zero of=/swapfile bs=64M count=16 sudo mkswap /swapfile sudo swapon /swapfile</div>
然后在编译完成后，在恢复到之前的状态
sudo swapoff /swapfile sudo rm /swapfile</div>
开始编译
./configure make make install</div>
中间会出现错误如：
编译一下harfbuzz 参照如下修改
Harfbuzz not found
$ brew install harfbuzz ... $ ./configure ... Checking for C++ library harfbuzz... no Could not find required header or shared library for harfbuzz ... Exiting... the following required dependencies were not found: - harfbuzz (HarfBuzz text shaping library | configure with HB_LIBS & HB_INCLUDES)</div>
Solution: HB_LIBS and HB_INCLUDES are directories, not cflags/ldflags, and HB_INCLUDES needs not to include the “harfbuzz” directory itself. If pkg-config says:
$ pkg-config --libs --cflags harfbuzz -I/usr/local/Cellar/harfbuzz/0.9.35_1/include/harfbuzz -L/usr/local/Cellar/harfbuzz/0.9.35_1/lib -lharfbuzz</div>
what you actually need is 修改配置文件为，直接指定HB_LIBS，HB_INCLUDES
$ ./configure HB_LIBS=/usr/local/Cellar/harfbuzz/0.9.35_1/lib HB_INCLUDES=/usr/local/Cellar/harfbuzz/0.9.35_1/include</div>
简单测试
python import mapnik</div>
如果出现类似的错误
ImportError: libmapnik.so.3.0: cannot open shared object file: No such file or directory</div>
需要手工添加一下so的位置
vim /etc/ld.so.conf.d/mapnik-x86_64.conf</div>
添加一行内容： /usr/local/lib
然后保存退出，同时执行一下
ldconfig</div>
如果没有问题的话可以试一下渲染demo，会生成一些不同品质不同格式的图片demo文件
python demo/python/rundemo.py</div> </div>