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Add CMAKE_SYSROOT variable to set --sysroot when cross compiling.

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As CMAKE_ROOT_FIND_PATH can be a list, a new CMAKE_SYSROOT is
introduced, which is never a list.

The contents of this variable is passed to supporting compilers
as --sysroot. It is also accounted for when processing implicit
link directories reported by the compiler, and when generating
RPATH information.
This commit is contained in:
Stephen Kelly
2013-04-13 14:46:57 +02:00
committed by Brad King
parent 5096967ecd
commit 7cd65c97fa
8 changed files with 78 additions and 9 deletions
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Help/variable/CMAKE_SYSROOT.rst
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CMAKE_SYSROOT
-------------
Path to pass to the compiler in the ``--sysroot`` flag.
The ``CMAKE_SYSROOT`` content is passed to the compiler in the ``--sysroot``
flag, if supported. The path is also stripped from the RPATH/RUNPATH if
necessary on installation. The ``CMAKE_SYSROOT`` is also used to prefix
paths searched by the ``find_*`` commands.
This variable may only be set in a toolchain file specified by
the ``CMAKE_TOOLCHAIN_FILE`` variable.