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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/command/FIND_XXX_ROOT.txt
+9 -2
View File
@@ -1,10 +1,17 @@
The CMake variable CMAKE_FIND_ROOT_PATH specifies one or more
directories to be prepended to all other search directories. This
effectively "re-roots" the entire search under given locations. By
default it is empty. It is especially useful when cross-compiling to
default it is empty.
The :variable:`CMAKE_SYSROOT` variable can also be used to specify exactly one
directory to use as a prefix. Setting :variable:`CMAKE_SYSROOT` also has other
effects. See the documentation for that variable for more.
These variables are especially useful when cross-compiling to
point to the root directory of the target environment and CMake will
search there too. By default at first the directories listed in
CMAKE_FIND_ROOT_PATH and then the non-rooted directories will be
CMAKE_FIND_ROOT_PATH are searched, then the :variable:`CMAKE_SYSROOT` directory is
searched, and then the non-rooted directories will be
searched. The default behavior can be adjusted by setting
|CMAKE_FIND_ROOT_PATH_MODE_XXX|. This behavior can be manually
overridden on a per-call basis. By using CMAKE_FIND_ROOT_PATH_BOTH