Re: Portable $addprefix

[Kip Warner]

On Mon, 2017-08-28 at 11:03 -0700, Quinn Grier wrote:
> A portable way to do this is to do the work in configure.ac and
> transfer
> it to the Makefile with AC_SUBST. For example, with an empty
> Makefile.am
> and the following configure.ac:
> 
>       AC_INIT([Example], [1.0])
>       AM_INIT_AUTOMAKE([foreign])
> 
>       m4_define([m_files_only], [a.foo b.foo c.foo])
>       files_only='m_files_only'
>       files_with_path='m4_map_args_w(m_files_only, [dir/], [], [ ])'
>       AC_SUBST([files_only])
>       AC_SUBST([files_with_path])
> 
>       AC_CONFIG_FILES([Makefile])
>       AC_OUTPUT
> 
> The desired macros will appear in the resulting Makefile:
> 
>       files_only = a.foo b.foo c.foo
>       files_with_path = dir/a.foo dir/b.foo dir/c.foo

Hey Quinn. This would have worked perfectly, except automake bails when
I run autoreconf:

    autoreconf: running: automake --add-missing --copy --no-force
    configure.ac:310: error: 'parser_clobbered_source_full_paths' includes 
configure substitution     '@parser    _clobbered_source_full_paths@'
    configure.ac:310: and is referred to from 'nodist_narayan_designer_SOURCES';
    configure.ac:310: configure substitutions are not allowed in _SOURCES 
variables
    autoreconf: automake failed with exit status: 1

This is likely because as the message says, I am attempting to use the
substitution within a *_SOURCES variable.

Is this a dead end or is there a workaround? Assume a reference within
a _SOURCES variable is probably necessary.

-- 
Kip Warner | Senior Software Engineer
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http://www.thevertigo.com

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