Making FindBoost prefer Boost_ROOT

[Matthew Woehlke]

Andreas Pakulat wrote:
> On 26.03.08 18:32:26, Matthew Woehlke wrote:
>> Alexander Neundorf wrote:
>>> On Thursday 27 March 2008, Matthew Woehlke wrote:
>>>> Alexander Neundorf wrote:
>>>> Besides I'd rather not pollute CMAKE_PREFIX_PATH with
>>>> random packages' stuff when I can use Boost_ROOT instead. (Shouldn't
>>>> that be upper-case?)
>>> I don't think introducing an environment variable for every package is 
>>> a good idea.
>> Why not? We have QTDIR, KDEDIR,
> 
> No we don't.

Ok, so maybe I just have them to deal with all the setting of PATH, 
LD_LIBRARY_PATH, etc I have to do, then :-). But I still prefer writing 
my environment-setup scripts that way; plus it's nice to be able to do 
things like 'ls $QTDIR/include'.

>> However, I think you miss the point. Boost *already* has Boost_ROOT*.  
>> The problem is that its find does a lousy job of honoring it (because it  
>> doesn't check twice with NO_DEFAULT_PATH, a system-level flavor is  
>> preferred over one in $Boost_ROOT).
> 
> I've recently got a private mail with some fixes for the FindBoost.cmake
> thats (hopefully) getting into a CMake 2.6.x release. I just need to get
> around at backporting some of them to the kdevplatform one (because the
> 2.6 version uses 2.6 features)

Ok. Btw I found I had remove the 'if(NOT Boost_INCLUDE_DIR)' in the 
foreach also, since the system one is found immediately, but the 
BOOST_ROOT one, being the last version that is checked, isn't found for 
several iterations. Other than being slower (not noticeably so, and only 
at configure time), I don't think it's a problem.

That said, the version list should probably search latest-first.

Incidentally, I also did this:
-              SET(Boost_INCLUDE_DIR FALSE)
+              SET(Boost_INCLUDE_DIR Boost_INCLUDE_DIR-NOTFOUND)


-- 
Matthew
I'm anti-ascii. Probably because I once worked with a guy who sent EVERY 
BLOODY DESIGN SCHEMA as an ascii art thing. A year into that job and I 
just about wanted to punch him in the head with an ascii fist. He 
totally ruined ascii porn for me even. -- Aaron Seigo