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install.md: add xtgettcap to PGO build instructions

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Daniel Eklöf 2022-10-08 16:56:28 +02:00
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INSTALL.md
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@ -327,6 +327,7 @@ We will use the `pgo` binary along with input corpus generated by
`scripts/generate-alt-random-writes.py`:
```sh
./utils/xtgettcap name
./footclient --version
./foot --version
tmp_file=$(mktemp)
@ -349,9 +350,10 @@ rm ${tmp_file}
```
The first step, running `./foot --version` and `./footclient
--version` might seem unnecessary, but is needed to ensure we have
_some_ profiling data for functions not covered by the PGO helper
binary. Without this, the final link phase will fail.
--version` etc, might seem unnecessary, but is needed to ensure we
have _some_ profiling data for functions not covered by the PGO helper
binary, for **all** binaries. Without this, the final link phase will
fail.
The snippet above then creates an (empty) temporary file. Then, it
runs a script that generates random escape sequences (if you cat