Bump eigen to v5.0.0

Also update the installation directory in the cmake build to just
usr-host/include.  Otherwise, it will install to
usr-host/include/eigen3 and we'd need to add extra flags to find the
headers.

[ci skip]

Author: d-torrance

M2/cmake/build-libraries.cmake

@@ -147,8 +147,8 @@ else()
   set(EIGEN_BUILD_TYPE Release)
 endif()
 ExternalProject_Add(build-eigen
-  URL               https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.bz2
-  URL_HASH          SHA256=b4c198460eba6f28d34894e3a5710998818515104d6e74e5cc331ce31e46e626
+  URL               https://gitlab.com/libeigen/eigen/-/archive/5.0.0/eigen-5.0.0.tar.bz2
+  URL_HASH          SHA256=bdca0ec740fb83be21fe038699923f4c589ead9ab904f4058a9c97752e60d50b
   PREFIX            libraries/eigen
   BINARY_DIR        libraries/eigen/build
   DOWNLOAD_DIR      ${CMAKE_SOURCE_DIR}/BUILD/tarfiles
@@ -157,6 +157,7 @@ ExternalProject_Add(build-eigen
                     -DBUILD_TESTING=${BUILD_TESTING}
                     -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
                     -DCMAKE_CXX_FLAGS=${CXXFLAGS}
+                    -DINCLUDE_INSTALL_DIR:PATH=include
   INSTALL_COMMAND   ${CMAKE_COMMAND} --install . ${strip_setting}
           COMMAND   ${CMAKE_COMMAND} -E make_directory ${M2_INSTALL_LICENSESDIR}/eigen
           COMMAND   ${CMAKE_COMMAND} -E copy_if_different ../src/build-eigen/COPYING.MPL2 ${M2_INSTALL_LICENSESDIR}/eigen

M2/libraries/eigen/Makefile.in

@@ -1,5 +1,5 @@
 HOMEPAGE = https://eigen.tuxfamily.org/
-VERSION = 3.4.0
+VERSION = 5.0.0
 URL = https://gitlab.com/libeigen/eigen/-/archive/$(VERSION)
 TARFILE = eigen-$(VERSION).tar.gz
 LICENSEFILES = COPYING.* README.md