centos7安装libgdiplus。netcore生成验证码，处理图片

yum install autoconf automake libtool
yum install freetype-devel fontconfig libXft-devel
yum install libjpeg-turbo-devel libpng-devel giflib-devel libtiff-devel libexif-devel
yum install glib2-devel cairo-devel
git clone https://github.com/mono/libgdiplus
cd libgdiplus
./autogen.sh
make
make install
cd /usr/lib64/
ln -s /usr/local/lib/libgdiplus.so gdiplus.dll

ln -s /usr/local/lib/libgdiplus.so /usr/lib64/libgdiplus.so

ln -s /usr/local/lib/libgdiplus.so /usr/libgdiplus.so

vi /etc/ld.so.conf

##将 /usr/local/lib 加入

ldconfig #配置生效。