Typos found with codespell.
* doc/libtool.texi: Change 'incompatabile' to 'incompatible'.
* doc/notes.texi: Change 'neccesary' to 'necessary'.
Tests @command{libtool}'s versioning system. Tests begin with verifying the
behaviour of @command{libtool} versioning flags @option{-version-info} and
@option{-version-number}. Next, this tests installing a library, then updating
-the library with a new revision, a compatible update, and an incompatabile
+the library with a new revision, a compatible update, and an incompatible
update. In each case, the tests verify that the original library will link and
install as expected.
@code{CXX='pgCC --one_instantiation_per_object'} and avoid parallel @command{make}.
@item
-For C++ code, it may be neccesary to specify a library if it is a dependency
+For C++ code, it may be necessary to specify a library if it is a dependency
of a link/compile flag. For example in GNU G++, if you want to use
@code{-fsanitize=address} you need to specify the @code{-lasan} library,
like so: @code{g++ -o libx.la -fsanitize=address -lasan -rpath [...]}.