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Mention the CMAKE_PREFIX_PATH variable.

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Gael Guennebaud 2016-12-06 15:23:45 +01:00
parent f90c4aebc5
commit f725f1cebc
1 changed files with 7 additions and 3 deletions
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10
doc/TopicCMakeGuide.dox
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@ -32,9 +32,13 @@ which requires at least version 3.3 of %Eigen. Here, `path-to-example-directory`
is the path to the directory that contains both `CMakeLists.txt` and
`example.cpp`.
If you have multiple installed version of %Eigen, you can pick your favorite one by setting the \c Eigen3_DIR cmake's variable to the respective path containing the \c Eigen3*.cmake files. For instance:
\code
cmake path-to-example-directory -DEigen3_DIR=$HOME/mypackages/share/eigen3/cmake/
Do not forget to set the <a href="https://cmake.org/cmake/help/v3.7/variable/CMAKE_PREFIX_PATH.html">\c CMAKE_PREFIX_PATH </a> variable if Eigen is not installed in a default location or if you want to pick a specific version. For instance:
\code{.sh}
$ cmake path-to-example-directory -DCMAKE_PREFIX_PATH=$HOME/mypackages
\endcode
An alternative is to set the \c Eigen3_DIR cmake's variable to the respective path containing the \c Eigen3*.cmake files. For instance:
\code{.sh}
$ cmake path-to-example-directory -DEigen3_DIR=$HOME/mypackages/share/eigen3/cmake/
\endcode
If the `REQUIRED` option is omitted when locating %Eigen using