eigen3: The source directory does not appear to contain CMakeLists.txt

[sk-public@…]

eigen3 doesn't build, apparently because a bunch of options and the configuration directory are appended after the source directory (../eigen_src).

It builds again if

configure.args-append   ../eigen_src

is changed to

configure.post_args   ../eigen_src

But I'm not familiar enough with the macports build process (including this cmake out-of-source transition, which looks related) to tell if this is a coincidence or a solution.

The error is:
CMake Error: The source directory "/opt/macports/var/macports/build/_opt_macports_var_macports_sources_rsync.macports.org_release_tarballs_ports_math_eigen3/eigen3/work/3.2.4" does not appear to contain CMakeLists.txt. Specify --help for usage, or press the help button on the CMake GUI. Command failed: cd "/opt/macports/var/macports/build/macports_opt_macports_var_macports_sources_rsync.macports.org_release_tarballs_ports_math_eigen3/eigen3/work/3.2.4" && /opt/macports/bin/cmake -DCMAKE_INSTALL_PREFIX=/opt/macports -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_COLOR_MAKEFILE=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON -DCMAKE_INSTALL_RPATH=/opt/macports/lib -DCMAKE_INSTALL_NAME_DIR=/opt/macports/lib -DCMAKE_SYSTEM_PREFIX_PATH="/opt/macports;/usr" -DCMAKE_MODULE_PATH=/opt/macports/share/cmake/Modules -DCMAKE_FIND_FRAMEWORK=LAST -Wno-dev ../eigen_src -DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" -DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" -DCMAKE_OSX_ARCHITECTURES="" -DCMAKE_OSX_DEPLOYMENT_TARGET="10.10" -DCMAKE_OSX_SYSROOT="/" /opt/macports/var/macports/build/_opt_macports_var_macports_sources_rsync.macports.org_release_tarballs_ports_math_eigen3/eigen3/work/3.2.4

[larryv (Lawrence Velázquez)]

Replying to sk-public@…:

(including this cmake out-of-source transition, which looks related)

It is related. The opencv port had a similar problem in #47256, which was solved with r134472. eigen3 needs a similar fix.

[eborisch (Eric A. Borisch)]

Fixed in r134500.

[larryv (Lawrence Velázquez)]

Uh, okay, but why not use the portgroup's support?

[eborisch (Eric A. Borisch)]

To minimize changes to the Portfile at this point. Perhaps I will at the next version bump...