doc: Update bit about GUIX_LD_WRAPPER_ALLOW_IMPURITIES.

This is a followup to d0a2db47fb.

* doc/guix.texi (Application Setup)[The GCC toolchain]: Adjust bit
about GUIX_LD_WRAPPER_ALLOW_IMPURITIES.
This commit is contained in:
Ludovic Courtès 2019-01-25 23:25:03 +01:00
parent 1379319fe7
commit 280e9c2a26
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@ -1723,16 +1723,11 @@ including GCC itself, the GNU C Library (headers and binaries, plus
debugging symbols in the @code{debug} output), Binutils, and a linker
wrapper.
@cindex attempt to use impure library, error message
The wrapper's purpose is to inspect the @code{-L} and @code{-l} switches
passed to the linker, add corresponding @code{-rpath} arguments, and
invoke the actual linker with this new set of arguments. By default,
the linker wrapper refuses to link to libraries outside the store to
ensure ``purity''. This can be annoying when using the toolchain to
link with local libraries. To allow references to libraries outside the
store you need to define the environment variable
@code{GUIX_LD_WRAPPER_ALLOW_IMPURITIES}.
invoke the actual linker with this new set of arguments. You can instruct the
wrapper to refuse to link against libraries not in the store by setting the
@code{GUIX_LD_WRAPPER_ALLOW_IMPURITIES} environment variable to @code{no}.
@c TODO What else?