安装python时出错: /usr/lib/qgis/crssync:符号查找错误: /usr/lib/libgdal.so.26:未定义符号: GEOSMakeValid_r

Question

在Ubuntu18.04.5LTS上，当我尝试安装python3-venv或卸载python3.8时，我收到以下错误消息，从下面一行开始：

/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libgdal.so.26: undefined symbol: GEOSMakeValid_r

有人能帮我解决这个问题吗？可能出了什么问题？提前感谢！

❯ sudo apt-get install python3-venv
Reading package lists... Done
Building dependency tree
Reading state information... Done
python3-venv is already the newest version (3.6.7-1~18.04).
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
4 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up qgis-providers (3.10.12+dfsg-1~bionic1) ...
/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libgdal.so.26: undefined symbol: GEOSMakeValid_r
dpkg: error processing package qgis-providers (--configure):
 installed qgis-providers package post-installation script subprocess returned error exit status 127
dpkg: dependency problems prevent configuration of qgis:
 qgis depends on qgis-providers (= 3.10.12+dfsg-1~bionic1); however:
  Package qgis-providers is not configured yet.
dpkg: error processing package qgis (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of python3-qgis:
 python3-qgis depends on qgis-providers (= 3.10.12+dfsg-1~bionic1); however:
  Package qgis-providers is not configured yet.
dpkg: error processing package python3-qgis (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of qgis-plugin-grass:
 qgis-plugin-grass depends on qgis (= 3.10.12+dfsg-1~bionic1); however:
  Package qgis is not configured yet.
dpkg: error processing package qgis-plugin-grass (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          No apport report written because the error message indicates its a followup error from a previous failure.
    No apport report written because MaxReports is reached already
                                                                  Errors were encountered while processing:
 qgis-providers
 qgis
 python3-qgis
 qgis-plugin-grass
E: Sub-process /usr/bin/dpkg returned an error code (1)

Answer 1

当我尝试在ubuntu 18.04上安装qgis时，我也遇到了同样的问题和错误信息。

根据这篇讨论中的提示，https://github.com/OSGeo/gdal/issues/2214似乎问题在于，在我的系统上安装了geos-3.5.0时，gdal期望的是geos-3.8.0或更高版本。

手动安装源码中的geos-3.8.1 (可以在这里找到：https://trac.osgeo.org/geos/)解决了这个问题，并允许我安装qgis。