[PATCH video-intel] simplify Makefile as per-target compilation flags are not needed

[Alan Coopersmith]

Chris Wilson wrote:
> On Fri, 23 Jul 2010 19:15:22 -0400, Gaetan Nadon <memsize at videotron.ca> wrote:
>> We then do not need the AM_PROG_CC_C_O to detect compiler who
>> do not accept both -c and -o together.
>>
>> This setup is only needed when the same source is compiled
>> multiple times with different compiler options.
> 
> Looks ok, and I don't have plans to break it in the immediate future.
> There used to be a C file shared between i810 and i830, no longer.
> 
> Can you add a note explaining the target_CFLAGS to AM_CFLAGS change? Why
> does that need to be coupled to the removal of AM_PROG_CC_C_O or is that
> just accidental?

It's part of the same change - "target_CFLAGS" is what indicates to automake
that the same file needs to be compiled for different targets with different
CFLAGS:
http://sources.redhat.com/automake/automake.html#index-maude_005fCFLAGS-463

AM_CFLAGS indicates the same CFLAGS are used for compiling all C sources in
the directory.  Per-target CFLAGS in Makefile.am require AM_PROG_CC_C_O in
configure.ac.

-- 
	-Alan Coopersmith-        alan.coopersmith at oracle.com
	 Oracle Solaris Platform Engineering: X Window System