bug#54020: Impossible to pass `-no-suppress` to `libtool` via automake files

Hi Damian - thanks for the report. LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \ $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \ $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \ $(AM_CFLAGS) $(CFLAGS) ... `libtool` has a

bug#10828: [PATCH] rm: handle -f w/no arguments gracefully

Fixes automake bug https://bugs.gnu.org/10828. Delete the configure check that would abort if `rm -f` does not work, and delete the plans to make this a hard requirement in the future. Instead, test to see if `rm -f` fails w/out arguments. If it does, define am__rm_f such that it always passes a