Download and Install Eigen in Build Directory
Keywords: download install eigen build directory and syntax purpose distribution external prefix reuse

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Download and Install Eigen in Build Directory
Syntax `
bin/get_eigen.sh`
Purpose
If you are using Unix, this command will download and install Eigen in the CppAD `build` directory.
Distribution Directory
This command must be executed in the distribution directory .
External Directory
The Eigen source code is downloaded into the sub-directory `build/external` below the distribution directory.
Prefix Directory
The Eigen include files are installed in the sub-directory `build/prefix/include/Eigen` below the distribution directory.
Reuse
The file `build/external/eigen-version.tar.gz` and the directory `build/external/eigen-version` will be reused if they exist. Delete this file and directory to get a complete rebuild.

Input File: bin/get_eigen.sh