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 command line option, `-no-suppress` ...
Well, the immediate answer would apparently be to add yet another
variable after the --mode=compile, say LTMODEOPTS for the sake of
argument (have to think about the name), so the output is
LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
$(LIBTOOLFLAGS) --mode=compile $(LTMODEOPTS) $(CC) ...
Mike, Jim, wdyt? --thanks, karl.