Boost logo

Boost :

Subject: Re: [boost] [predef] Using predef-check on 'develop' problem
From: Edward Diener (eldiener_at_[hidden])
Date: 2015-06-10 00:55:43


On 6/9/2015 10:56 PM, Jessica Hamilton wrote:
> On 9 June 2015 at 19:40, Rene Rivera <grafikrobot_at_[hidden]> wrote:
>> On Fri, Jun 5, 2015 at 9:42 PM, Edward Diener <eldiener_at_[hidden]>
>> wrote:
>>
>>> I think I know what is wrong in the predef-check functionality. In my VMD
>>> jamfile the use of predef-check, for any given compile or run rule, looks
>>> like:
>>>
>>> [ predef-check "BOOST_COMP_GNUC >= 4.3" "BOOST_OS_QNX == 0" : :
>>> <cxxflags>-std=c++0x ]
>>>
>>
>> Yes..
>>
>> What I am seeing is that except on QNX, where "BOOST_OS_QNX != 0", the
>>> '-std=c++0x' is always being added as a C++ compiler flag to the command
>>> line.
>>>
>>> This initially suggests to me that you are treating more than one quoted
>>> predef definition as an OR gate rather than an AND gate. But note that on
>>> QNX, where where "BOOST_OS_QNX != 0" and "BOOST_COMP_GNUC >= 4.3" is true,
>>> the '-std=c++0x' is not being added. So your logic seems to be that as you
>>> go through multiple predef definitions once you hit a 'true' condition you
>>> choose the 'true' path as long as no 'false' conditions follow it, else you
>>> choose the 'false' path.
>>>
>>> Please see if you can fix this given this clue about how predef-check is
>>> working for the VMD regression tests on various platforms/compilers.
>>
>>
>> I don't know if it helped but I did a change to one of the tests I do to
>> completely cover all the Venn variations of the binary and expression. I
>> changed my test to this:
>>
>> [ run check_value.cpp : : : <test-info>always_show_run_output
>> [ predef-check "BOOST_COMP_CLANG > 0" "BOOST_OS_LINUX == 0" : :
>> <cxxflags>-DCHECK_VALUE=true : <cxxflags>-DCHECK_VALUE=false ] ]
>
> Out of curiosity, what happens if you remove the second <cxxflags>
> variable, and use an #ifndef check, and run again? It's the only
> difference I can notice between the two examples.

What happens if you specify:

[ run check_value.cpp : : : <test-info>always_show_run_output
     [ predef-check "BOOST_COMP_CLANG > 0" "BOOST_OS_LINUX == 0" : :
<cxxflags>-DCHECK_VALUE=true ] ]

In my tests I am leaving off the predef-check last colon ( ':' )
completely. Could that be the cause of the problem ? I will update my
jam file by inserting it back in and see if that fixes things.


Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk