tree 760e38c939bdbe668b0db3518a8eb91e489bd684
parent e4096f85fe37635461dcc0186b508a5a150468bc
author Patrick Williams <patrick@stwcx.xyz> 1647872048 -0500
committer Patrick Williams <patrick@stwcx.xyz> 1647872049 -0500

meson: enable override_find_program for subprojects

When sdbusplus is used as a meson subproject it is helpful to have a
section like:

```
    [provide]
    sdbusplus = sdbusplus_dep
    program_names = sdbus++, sdbus++-gen-meson
```

This allows a project to easily find both the 'sdbusplus' dependency
without manually setting a 'fallback' and it allows it to obtain the
typically used programs utilizing the `find_program`.  Doing this
requires usage of the `meson.override_find_program` in the subproject.

Meson doesn't like it if you pass an already `find_program` result into
the `override_find_program`.  The typical expectation from meson appears
to be that you are exporting a program you've compiled rather than an
existing script.  In order to work around this, add a simple indirection
where we symlink all of the executables to the same name prefixed with a
dot.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I23ab97d85c4c43d4e5ad0da00491b75ff03e110d