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doc/stdenv: Document autoPatchelfHook changes

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First of all, this makes the existing documentation a bit more clear on
what autoPatchelfHook is all about, because after discussing with
@svanderburg - who wrote a similar implementation - the rationale about
autoPatchelfHook wasn't very clear in the documentation.

I also added the recent changes around being able to use autoPatchelf
manually and the new --no-recurse flag.

Signed-off-by: aszlig <aszlig@nix.build>
This commit is contained in:
aszlig 2018-11-19 23:33:44 +01:00
parent 3ca35ce0b2
commit 503b41b9b2
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1 changed files with 25 additions and 6 deletions
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29
doc/stdenv.xml
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@ -2421,12 +2421,31 @@ addEnvHooks "$hostOffset" myBashFunction
<para>
This is a special setup hook which helps in packaging proprietary
software in that it automatically tries to find missing shared library
dependencies of ELF files. All packages within the
<envar>runtimeDependencies</envar> environment variable are
unconditionally added to executables, which is useful for programs that
use <citerefentry>
dependencies of ELF files based on the given
<varname>buildInputs</varname> and <varname>nativeBuildInputs</varname>.
</para>
<para>
You can also specify a <envar>runtimeDependencies</envar> environment
variable which lists dependencies that are unconditionally added to all
executables.
</para>
<para>
This is useful for programs that use <citerefentry>
<refentrytitle>dlopen</refentrytitle>
<manvolnum>3</manvolnum> </citerefentry> to load libraries at runtime.
<manvolnum>3</manvolnum>
</citerefentry> to load libraries at runtime.
</para>
<para>
In certain situations you may want to run the main command
(<command>autoPatchelf</command>) of the setup hook on a file or a set
of directories instead of unconditionally patching all outputs. This
can be done by setting the <envar>dontAutoPatchelf</envar> environment
variable to a non-empty value.
</para>
<para>
The <command>autoPatchelf</command> command also recognizes a
<parameter class="command">--no-recurse</parameter> command line flag,
which prevents it from recursing into subdirectories.
</para>
</listitem>
</varlistentry>