Check host system features
Look for a program among a list of alternative program the first found is returned.
Check the presence of a particular program.
Check the presence of a program or its native version.
The ocamlfind command line tool, used to query version of package. Use BaseStandardVar.ocamlfind variable if you want a safe way to access this variable.
version var_pref cmp ver ()
Check version ver ()
, using cmp
and
OASISVersion.comparator_apply. Generate a variable prefixed
by var_pref
and using OASISVersion.varname_of_comparator
.
Check for findlib package and version. Return install directory.