[WIP] Notes on full reinstall

[partouf]

(without system compiler)

sudo apt install make
sudo apt install libc6-dev
sudo apt install python3-venv
sudo apt install zlib1g-dev
sudo apt install m4

sudo mkdir /opt/compiler-explorer
sudo chown user:user /opt/compiler-explorer

cd /opt/compiler-explorer
git clone https://github.com/compiler-explorer/infra 
git clone https://github.com/compiler-explorer/compiler-explorer ce

cd infra
make ce
bin/ce_install install 'gcc 10.1.0'
bin/ce_install install 'clang 8.0.0'

export CC=/opt/compiler-explorer/gcc-10.1.0/bin/gcc
export CXX=/opt/compiler-explorer/gcc-10.1.0/bin/g++
export LD=/opt/compiler-explorer/gcc-10.1.0/bin/ld
export AR=/opt/compiler-explorer/gcc-10.1.0/bin/ar

update_compilers/install_binaries.sh

sudo ln -s /opt/compiler-explorer/gcc-10.1.0/bin/strip /usr/bin/strip
sudo ln -s /opt/compiler-explorer/gcc-10.1.0/bin/c++filt /usr/bin/c++filt

bin/ce_install install all the things!

bin/ce_install --enable nightly install 'gcc trunk'

TLDR takeaways: install_binaries depends on Clang 8, and most ce_install's depend on strip, which is part of gcc binutils

Also if you do make ce before python3-venv is installed, you need to do make clean first before being able to call make ce again

If something goes wrong during install_binaries, the folder for pahole will be empty and will not be built. You have to remove it every time before retrying install_binaries.

Gcc trunk is needed for readelf

You need c++filt for the unit tests

FPC needs AS to be in the path, so eventually it's unavoidable to install the system's gcc.

[mattgodbolt]

This is great! Thanks. One day we might have a CI build to ensure we install well from a freshly-minted OS.

[partouf]

Was testing installing Swift 5.3 locally and finding out it (swiftc) needs libtinfo.so.5 I assumed it would be in libtinfo-dev, but that didn't help for some reason.

partouf@ceub20:/opt/compiler-explorer/infra$ locate libtinfo.so
/snap/core18/1880/lib/x86_64-linux-gnu/libtinfo.so.5
/snap/core18/1880/lib/x86_64-linux-gnu/libtinfo.so.5.9
/snap/core18/1885/lib/x86_64-linux-gnu/libtinfo.so.5
/snap/core18/1885/lib/x86_64-linux-gnu/libtinfo.so.5.9
/usr/lib/x86_64-linux-gnu/libtinfo.so
/usr/lib/x86_64-linux-gnu/libtinfo.so.6
/usr/lib/x86_64-linux-gnu/libtinfo.so.6.2

partouf@ceub20:/opt/compiler-explorer/infra$ bin/ce_install install 'swift 5.3'
2020-09-17 09:21:41,495 lib.installation INFO     Making uncached requests
Installing compilers/swift 5.3
/opt/compiler-explorer/swift-5.3/usr/bin/swiftc: error while loading shared libraries: libtinfo.so.5: cannot open shared object file: No such file or directory

Installing via sudo apt install libtinfo5 does work