Re: use of '#define FOO' in macro

Hi,

sorry for the slow reply! -p invokes the external preprocessor - all preprocessor macros will already be expanded when CINT sees your code. It will thus not be able to use it.

Instead, do not use -p, and instead use the following hack. Put in your Linkdef.h:
extern const bool b1;
#pragma link C++ global b1;

This way, CINT will know that b1 is a variable. And you don't have to change the CCfits header files.

Cheers, Axel.

OKUMURA, Akira wrote:
> Hello ROOTers,
>
> '-p' option given to rootcint seems to prevent my code from using global
> macro. I wrote simple test codes which had some '#define' constants and
> compiled them using '-p' option of rootcint. I could not access such
> constants from interpreter but I could do it if I delete '-p'.
>
> However in my original code which was linked to CCFITS needs '-p'
> because a declaration of bool in its header cannot be handled by CINT
> correctly.
> (see http://root.cern.ch/root/roottalk/roottalk06/1562.html)
>
> Any suggestion?
>
> Sincerely
>
> OKUMURA, Akira oxon_at_icrr.u-tokyo.ac.jp
> Institute for Cosmic Ray Research, University of Tokyo
> 5-1-5 Kashiwanoha Kashiwa Chiba 277-8582 Japan
> Phone/Fax : +81 4-7136-3153
> Skype : okumura.akira
>
> On 2007/05/23, at 5:00, OKUMURA, Akira wrote:
>

>> Hello ROOTers,
>>
>> I found an old post in roottalk.
>> http://root.cern.ch/root/roottalk/roottalk98/2493.html
>> I tried this but I still get 'Error: Symbol SHORT_IMG is ...'.
>>
>> I added
>> #defined SHORT_IMG 16
>> in FITSfunction.h, and
>> #pragma link C++ global SHORT_IMG;
>> in FITSLinkDef.h .
>>
>> These two headers correspond to CERNfunction.h and CERNLinkDef.h
>> (see http://root.cern.ch/root/HowtoCERNLIB.html)
>>
>> Sincerely
>>
>> OKUMURA, Akira oxon_at_icrr.u-tokyo.ac.jp
>> Institute for Cosmic Ray Research, University of Tokyo
>> 5-1-5 Kashiwanoha Kashiwa Chiba 277-8582 Japan
>> Phone/Fax : +81 4-7136-3153
>> Skype : okumura.akira
>>
>> On 2007/05/22, at 17:44, OKUMURA, Akira wrote:
>>
>>> Hello ROOTers
>>>
>>> I compiled my original ROOT according to the web page
>>> http://root.cern.ch/root/HowtoCERNLIB.html
>>> It was compiled with the library CCfits (C++ FITS library).
>>>
>>> One of its headers has some #define lines such as
>>> #define BYTE_IMG      8
>>> #define SHORT_IMG    16
>>> #define LONG_IMG     32
>>>
>>> If I use these constants in my macro, I get an error.
>>> root [0] .x test.C
>>> Error: Symbol SHORT_IMG is not defined in current scope  cookbook.C:114:
>>> *** Interpreter error recovered ***
>>>
>>> but
>>> root [0] .x test.C+
>>> runs as I expected.
>>>
>>> Is it possible to use #define constants of the library in my macro
>>> without compiling? Is there any solution?
>>>
>>> Sincerely
>>>
>>> OKUMURA, Akira oxon_at_icrr.u-tokyo.ac.jp
>>> Institute for Cosmic Ray Research, University of Tokyo
>>> 5-1-5 Kashiwanoha Kashiwa Chiba 277-8582 Japan
>>> Phone/Fax : +81 4-7136-3153
>>> Skype : okumura.akira
>>>
>>>
>>
>>