On Mac OS, set default FC_DEFAULT_FONTS to system font directories
To address #257 (closed), this MR modifies both the configure.ac
and meson.build
to automatically detect when compiling for Mac OS and then set the default system font directories accordingly. To allow multiple default directories, the ,
-based list is converted to <dir>...</dir>
, and the <dir>
tags are removed from the fonts.conf.in
and fcinit.c
accordingly.