Re: 026fa0d5ad Breaks installs with absolue $(gitexecdir) and $(template_dir) variables using older GNU makes

Junio C Hamano [off-list ref] writes:

Regardless, I think your patch to config.mak is independently good,
because the way Makefile defines these directories is without the trailing
slash, and it would be better to be consistent.

In other words, I am thinking about applying your patch after amending the 
log message like this.

    [PATCH] config.mak.in: define paths without trailing slash

    The main Makefile defines gitexecdir and template_dir without trailing
    slash.  config.mak.in should do the same to be consistent.

    Signed-off-by: Pascal Obry [off-list ref]

I think the misuse of abspath is a separate issue.

The main Makefile should be made robust not to misdetect the relative vs
absolute, especially because not everybody uses config.mak.autogen, and
because people should be able to override these variables from the command
line of make invocation and the name of the directory with or without
trailing slash ought to mean the same thing.