Re: Automake passing CFLAGS or CXXFLAGS when linking

[Bob Friesenhahn]

On Tue, 28 Jun 2016, Grégory Pakosz wrote:

> Hello,
>
> What's the rationale behind Automake passing CFLAGS or CXXFLAGS when linking?
>
> LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
>  $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
>  $(AM_LDFLAGS) $(LDFLAGS) -o $@

Notice that these lines all start with $(LIBTOOL).  Libtool will 
normally discard flags not needed for linking.  It is common for 
libtool to link using the C compiler when possible and so the C 
compiler can also use/discard options as needed.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/