Re: relocatable-prog: avoid warnings from Automake

[Bruno Haible]

Hi Akim,

> This is what I get currently:
> 
>  cd bison && /bin/sh build-aux/missing automake-1.16 --gnu Makefile
> lib/gnulib.mk:1677: warning: .PHONY was already defined in condition TRUE, 
> which includes condition RELOCATABLE_VIA_WRAPPER ...

I've seen this warning also with respect to normal dependencies like

foo.o : foo.c
        $(CC) $(CPPFLAGS) $(CFLAGS) -c foo.c
if USE_XYZ
foo.o : xyz.h
endif

It would be better if this case was fixed in Automake.

But in the absence of Automake maintenance, your proposed patch is good.
Maybe add a comment:
# Automake warns about conditionally added dependencies to unconditionally 
defined targets.

Bruno