Hi David
> I'm curious why the macros
>
> AC_CONFIG_SUBDIRS
> and
> AC_SUBST
>
> take differing arguments to work?
Because the arguments are of different type: AC_CONFIG_SUBDIRS gets a
literal string which resolves to a list of paths, while AC_SUBST gets
the name of an output variable name (@xxx@) to substitute with value
of a shell variable of the same name when configure is run.
> AC_CONFIG_SUBDIRS([${SRC_SUBDIRS}])
Using variables is not recommended since it prevents `./configure
--help=recursive' from working correctly.
See
http://www.gnu.org/software/autoconf/manual/autoconf-2.62/html_node/Subdirectories.html
Best regards
Carsten
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