[PATCH] gdb/gdbserver: switch to AC_CONFIG_MACRO_DIRS

[Simon Marchi]

On 2021-06-15 1:44 a.m., Mike Frysinger via Gdb-patches wrote:
> These dirs don't use automake, so use AC_CONFIG_MACRO_DIRS to specify
> ../config as a search dir for m4 macros.  This allows removal of a lot
> of hand-written m4_include's from acinclude.m4 files, and simplifies
> use of `aclocal` or `autoreconf` as manual -I is not needed.

For some reason, I get this when reconfiguring gdb:

    configure.ac:531: warning: macro 'AM_ICONV' not found in library

The result looks ok, the resulting configure looks fine, but if you
happen to know why...

Simon