Apollo: About the gcc/g++ version required by apollo.
Hi,
On Ubuntu 20.04, I want to install git master version of apollo on the apollo Dev-kit vehicle. I noticed that the suggested gcc/g++ version is 4.8. Considering that it's a rather old version, so I'm very confused on this requirement. Any hints for this problem?
Regards.
hongyi-zhao
All 7 comments
Hi,
On Ubuntu 20.04, I want to install git master version of apollo on the apollo Dev-kit vehicle. I noticed that the suggested gcc/g++ version is 4.8. Considering that it's a rather old version, so I'm very confused on this requirement. Any hints for this problem?
Regards.
I think the main reason for gcc/g++-4.8 is to avoid possible compilation errors if compiled using higher gcc/g++ versions.
Currently we are working to fix them (if any) for ubuntu （18.04+）with gcc-7.5 & c++14. Once completed, the gcc/g++-4.8 requrements should be removed.
Also cc @diegohu
storypku
on 3 Jul 2020
I think the main reason for gcc/g++-4.8 is to avoid possible compilation errors if compiled using higher gcc/g++ versions.
Which errors?
Currently we are working to fix them (if any) for ubuntu （18.04+）with gcc-7.5 & c++14.
According to the document here, all versions of gcc 6.1+ support c++14.
Once completed, the gcc/g++-4.8 requrements should be removed.
OTOH, the current Ubuntu stable version is 20.04 LTS. Why not try to support the most recent version which shipped with 20.04:
```
$ g++ --version
g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ gcc --version
gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```
hongyi-zhao
on 3 Jul 2020
I think the main reason for gcc/g++-4.8 is to avoid possible compilation errors if compiled using higher gcc/g++ versions.
Which errors?
Currently we are working to fix them (if any) for ubuntu （18.04+）with gcc-7.5 & c++14.
According to the document here, all versions of gcc 6.1+ support c++14.
Once completed, the gcc/g++-4.8 requrements should be removed.
OTOH, the current Ubuntu stable version is 20.04 LTS. Why not try to support the most recent version which shipped with 20.04:
$ g++ --version g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0 Copyright (C) 2019 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ gcc --version gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 Copyright (C) 2019 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
1) About compilation errors:
gcc-7.5+ was more strict than gcc-4.8.5, so many modules can't compile under gcc-7.5+.
Presently, we are working to get them all resolved.
2) About gcc-9.3 and gcc-7.5:
Ubuntu 18.04 ships gcc-7.5 while Ubuntu 20.04 ships gcc-9.3 as default gcc compiler. We are trying hard to make sure Apollo can compile and run on them both with c++14/17 standards. And, our arm64 support was not complete yet. All these need effort.
Backward compatibility is important to any software systems, so do Apollo.
Thanks for your attention to Apollo. Hope my answer helps.
storypku
on 3 Jul 2020
Hi,
On Ubuntu 20.04, I want to install git master version of apollo on the apollo Dev-kit vehicle. I noticed that the suggested gcc/g++ version is 4.8. Considering that it's a rather old version, so I'm very confused on this requirement. Any hints for this problem?
Regards.I think the main reason for gcc/g++-4.8 is to avoid possible compilation errors if compiled using higher gcc/g++ versions.
Currently we are working to fix them (if any) for ubuntu （18.04+）with gcc-7.5 & c++14. Once completed, the gcc/g++-4.8 requrements should be removed.
Also cc @diegohu
Today the master branch has been updated with ubuntu-18.04+gcc-7.5 support. gcc/g++-4.8 can be deleted now.
storypku
on 8 Jul 2020
Good news. Next step, I expect apollo can support up to the latest stable version of gcc/g++.
hongyi-zhao
on 8 Jul 2020
Good news. Next step, I expect apollo can support up to the latest stable version of gcc/g++.
Haha, hopes that we can meet your expectation.
storypku
on 9 Jul 2020
Good news. Next step, I expect apollo can support up to the latest stable version of gcc/g++.
Haha, hopes that we can meet your expectation.
Should be hope here :-)
hongyi-zhao
on 9 Jul 2020
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Most helpful comment
1) About compilation errors:
gcc-7.5+ was more strict than gcc-4.8.5, so many modules can't compile under gcc-7.5+.
Presently, we are working to get them all resolved.
2) About gcc-9.3 and gcc-7.5:
Ubuntu 18.04 ships gcc-7.5 while Ubuntu 20.04 ships gcc-9.3 as default gcc compiler. We are trying hard to make sure Apollo can compile and run on them both with c++14/17 standards. And, our
arm64support was not complete yet. All these need effort.Backward compatibility is important to any software systems, so do Apollo.
Thanks for your attention to Apollo. Hope my answer helps.