Package libopenexr-dev is not available, but is referred to by another package.

Package libopenexr-dev is not available, but is referred to by another package. 这个错误的原因可能是该包在你当前的软件源中不可用。你可以尝试更新你的软件源列表，以获取最新的可用软件包信息。更新软件源的方法可以参考/etc/apt/source.list文件中的源地址，并使用sudo apt-get update命令来更新软件源列表。

相关问题

handsfree@handsfree-nano:~$ sudo apt-get install libjpeg-dev libpng12-dev libtiff5-dev libopenexr-dev -y Reading package lists... Done Building dependency tree Reading state information... Done Package libpng12-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libpng12-dev' has no installation candidate

根据你提供的信息看起来像是安装libpng12-dev出现了问题。这可能是由于更新源的问题导致的。你可以尝试更新一下源，然后再次尝试安装该软件包。可以使用以下命令更新源：

sudo apt-get update

如果更新源后仍然无法安装libpng12-dev，则可以尝试安装libpng-dev来代替它，使用以下命令进行安装：

sudo apt-get install libjpeg-dev libpng-dev libtiff5-dev libopenexr-dev -y

希望这可以帮助您解决问题。

sudo apt-get install xlibmesa-gl-dev Reading package lists... Done Building dependency tree Reading state information... Done Package xlibmesa-gl-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: x11proto-gl-dev E: Package 'xlibmesa-gl-dev' has no installation candidate

这个错误提示说明 xlibmesa-gl-dev 包不存在或者已经被弃用了。你可以尝试安装替代的包 x11proto-gl-dev，使用以下命令进行安装：

sudo apt-get install x11proto-gl-dev

如果你需要使用 xlibmesa-gl-dev 特定版本的话，你可以尝试在其他源中查找该包。