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Merge pull request #28 from rolk/028_eigen

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Improve detection of the Eigen3 library
This commit is contained in:
Bård Skaflestad 2013-09-02 01:53:51 -07:00
commit db1299cf0c
1 changed files with 37 additions and 5 deletions
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42
cmake/Modules/FindEigen3.cmake
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@ -65,17 +65,49 @@ if (NOT EIGEN3_INCLUDE_DIR)
# other version to be swapped in to substitute; if not specified, then # other version to be swapped in to substitute; if not specified, then
# go search usual locations # go search usual locations
if (EIGEN3_ROOT) if (EIGEN3_ROOT)
# if we are given the path to a "build" tree (meaning somewhere Eigen3
# has been configured), then use the eigen3.pc file to figure out the
# name of the *real* root directory
if (EXISTS "${EIGEN3_ROOT}/CMakeCache.txt")
# get the cache entry that tells use the source tree location
set (_regex "Eigen_SOURCE_DIR:STATIC=\(.*\)")
file (STRINGS
"${EIGEN3_ROOT}/CMakeCache.txt"
EIGEN3_SOURCE_TREE
REGEX "${_regex}"
)
# trim away the key definition, be left with the value
if (EIGEN3_SOURCE_TREE)
string (REGEX REPLACE
"${_regex}"
"\\1"
EIGEN3_SOURCE_TREE
"${EIGEN3_SOURCE_TREE}"
)
# if something doesn't look as expected, abort and search in _ROOT
else ()
set (EIGEN3_SOURCE_TREE "${EIGEN3_ROOT}")
endif ()
else ()
set (EIGEN3_SOURCE_TREE "${EIGEN3_ROOT}")
endif ()
find_path (EIGEN3_INCLUDE_DIR find_path (EIGEN3_INCLUDE_DIR
NAMES signature_of_eigen3_matrix_library NAMES signature_of_eigen3_matrix_library
PATHS ${EIGEN3_ROOT} PATHS ${EIGEN3_SOURCE_TREE}
PATH_SUFFIXES eigen3 include/eigen3 eigen include/eigen PATH_SUFFIXES eigen3 include/eigen3 eigen include/eigen
NO_DEFAULT_PATH NO_DEFAULT_PATH
) )
else (EIGEN3_ROOT) else (EIGEN3_ROOT)
find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library # assume that if there is a sibling directory to our project which
PATHS # is called eigen3, there is a newer version located there, or that
${CMAKE_INSTALL_PREFIX}/include # it may have been checked out next to the build directory
${KDE4_INCLUDE_DIR} find_path(EIGEN3_INCLUDE_DIR
NAMES signature_of_eigen3_matrix_library
HINTS ${CMAKE_SOURCE_DIR}/../
${PROJECT_SOURCE_DIR}/../
${CMAKE_INSTALL_PREFIX}/include
${KDE4_INCLUDE_DIR}
PATH_SUFFIXES eigen3 eigen PATH_SUFFIXES eigen3 eigen
) )
endif (EIGEN3_ROOT) endif (EIGEN3_ROOT)