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knopers8 merged 1 commit into from
Jul 2, 2026
Merged

Update instructions for local build on an FLP suite setup #2672

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17 changes: 14 additions & 3 deletions doc/FLPsuite.md
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Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,9 @@ git checkout <release> # use the release included in the installed FLP suite
mkdir build
cd build
mkdir /tmp/installdir
source /opt/rh/gcc-toolset-14/enable # enable the compiler installed with o2-QualityControl-devel
cmake -DCMAKE_INSTALL_PREFIX=/tmp/installdir -G Ninja -DCLANG_EXECUTABLE=/opt/o2/bin-safe/clang -DCMAKE_BUILD_TYPE=RelWithDebugInfo ..
ninja -j16 install
ninja -j16 install
```

_**Compilation on top of a local O2**_
Expand All @@ -55,7 +56,10 @@ cd AliceO2
git checkout <release> # use the release included in the installed FLP suite
mkdir build
cd build
source /opt/rh/gcc-toolset-14/enable # enable the compiler installed with o2-QualityControl-devel, it might be more recent
cmake -DCMAKE_INSTALL_PREFIX=/tmp/installdir -G Ninja -DCLANG_EXECUTABLE=/opt/o2/bin-safe/clang -DCMAKE_BUILD_TYPE=RelWithDebugInfo ..
# if there are errors with FairLogger during compilation, try complementing cmake command with:
# -DCMAKE_SHARED_LINKER_FLAGS="-L/opt/o2/lib -lFairLogger -lfmt" -DCMAKE_EXE_LINKER_FLAGS="-L/opt/o2/lib -lFairLogger -lfmt"
ninja -j8 install

# QC
Expand All @@ -64,6 +68,7 @@ cd QualityControl
git checkout <release> # use the release included in the installed FLP suite
mkdir build
cd build
source /opt/rh/gcc-toolset-14/enable # enable the compiler installed with o2-QualityControl-devel, it might be more recent
cmake -DCMAKE_INSTALL_PREFIX=/tmp/installdir -G Ninja -DCLANG_EXECUTABLE=/opt/o2/bin-safe/clang -DCMAKE_BUILD_TYPE=RelWithDebugInfo -DO2_ROOT=/tmp/installdir ..
ninja -j8 install
```
Expand All @@ -74,13 +79,19 @@ In case the workflows will span over several FLPs and/or QC machines, one should

**Use it in aliECS**

In the aliECS gui, in the panel "Advanced Configuration", et an extra variable `extra_env_vars` and set it to
In the AliECS gui, in the panel "Advanced Configuration", add extra variables `extra_env_vars` and `jit_env_vars` and set both to

```
PATH=/tmp/installdir/bin/:$PATH; LD_LIBRARY_PATH=/tmp/installdir/lib/:/tmp/installdir/lib64/:$LD_LIBRARY_PATH; QUALITYCONTROL_ROOT=/tmp/installdir/; echo
```

Replace `/tmp/installdir` with your own path. Make sure that the directory is anyway readable and traversable by users `flp` and `qc`
Check `/etc/profile.d/o2.sh` and ensure PATH is augmented with `/opt/o2/bin` at the end, not at the beginning:
```
PATH=$PATH:/opt/o2/bin
```
This is important because during JIT template generation the order is `<jit_env_vars> && source /etc/profile.d/o2.sh && <dpl_command> ...`, so `/opt/o2/bin` would take precedence to any installation directory added in `jit_env_vars`.

Replace `/tmp/installdir` with your own path. Make sure that the directory is readable and traversable by users `flp` and `qc`.

## Switch detector in the workflow _readout-dataflow_

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