[MacPorts] #51925: hdf5-18 @1.8.16 Cannot use environment variable HDF5_ROOT_DIR

[MacPorts]

#51925: hdf5-18 @1.8.16 Cannot use environment variable HDF5_ROOT_DIR
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 Reporter:  fredericperez1@…  |      Owner:  macports-tickets@…
     Type:  request           |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:  2.3.4
 Keywords:  hdf5              |       Port:  hdf5-18 @1.8.16
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 Due to the switch to hdf5 @1.10.0, my software crashes (this hdf5 version
 has some bugs).

 The port hdf5-18 @1.8.16 fixes the problem, but moves all the dependencies
 to /opt/local/include/hdf5-18/ and /opt/local/lib/hdf5-18/. It turns out
 that a few programs use the environment variable HDF5_ROOT_DIR, which here
 points to /opt/local. It is used to point the compiler to
 $HDF5_ROOT_DIR/include and $HDF5_ROOT_DIR/lib.

 Of course, this does not work anymore because this would mean changing all
 my makefiles to $HDF5_ROOT_DIR/include/hdf5-18 and
 $HDF5_ROOT_DIR/lib/hdf5-18. This is not portable, thus I cannot make use
 anymore of this environment variable.

 I believe it would make more sense to have the hdf5-18 include and lib
 directories inside another single directory such as /opt/local/hdf5-18/,
 but I am not sure this is very good practice. In any case, the current
 implementation does not look workable for me.

 Thanks

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Ticket URL: <https://trac.macports.org/ticket/51925>
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