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我正在尝试从 https://sourceforge.net/projects/sserver/?source=typ_redirect 安装 Robocup 模拟器。如要构建它的文件夹中的 README 文件中所述，我必须执行 /.configure 但我收到此错误。
saurabh@saurabh-GL502VM:~/intelligent_systems/project/rcssserver-15.3.0$ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether the C++ compiler works... no
configure: error: in `/home/saurabh/intelligent_systems/project/rcssserver-15.3.0':
configure: error: C++ compiler cannot create ex
现在，当我检查我的 g++ 编译器时。
saurabh@saurabh-GL502VM:~/intelligent_systems/project/rcssserver-15.3.0$ g++ -v
The program 'g++' is currently not installed. You can install it by typing:
sudo apt install g++
但是当我尝试安装 g++ 编译器时，我得到了这个：
saurabh@saurabh-GL502VM:~/intelligent_systems/project/rcssserver-15.3.0$ sudo apt install g++
Reading package lists... Done
Building dependency tree
Reading state information... Done
g++ is already the newest version (4:5.3.1-1ubuntu1).
The following packages were automatically installed and are no longer required:
cpp-4.8 libcloog-isl4 xserver-xorg-legacy
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.
现在，我应该怎么做才能安装模拟器？谢谢！
原文由 talos1904 发布，翻译遵循 CC BY-SA 4.0 许可协议
apt-get可以找到多个版本的g++，甚至可以并排安装。但显然命令行上的“g++”必须是其中一个的快捷方式。您可以使用sudo update-alternatives --config g++更改该快捷方式。