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FAQ: add -static-pie information #77

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FAQ: add -static-pie information #77

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16 changes: 16 additions & 0 deletions faq.md
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Expand Up @@ -233,6 +233,22 @@ For example: `CFLAGS="-Dgnu_fnmatch=fnmatch -Drpl_getgroups=getgroups
[gnulib]: https://gitlab.com/sortix/sortix/wikis/Gnulib
[overwrite]: https://github.com/sabotage-linux/sabotage/blob/master/KEEP/gnulibfix

# Q: How to turn on static PIE support?

There's a [patch] by Harald Hoyer. It's been tested and is in use in the [Fedora package].

To use the musl-gcc wrapper:

```sh
CC="musl-gcc -static-pie" ./configure --prefix=$HOME/musl && make
```

`-static-pie` only affects linking options (`-static -pie --no-dynamic-linker -z text`), not compile options (`-fPIE`). As the default toolchain config isn't visible to the spec file logic, building a musl-based cross-toolchain is [recommended for non-basic use].

[patch]: https://www.openwall.com/lists/musl/2020/05/08/1
[Fedora package]: https://src.fedoraproject.org/rpms/musl/blob/rawhide/f/musl-1.2.0-Support-static-pie-with-musl-gcc-specs.patch
[recommended for non-basic use]: https://www.openwall.com/lists/musl/2020/04/07/1

# Q: None of these are questions!

Why would the Frequently Aired Quandaries page have questions?