Hi rooters,
I'm still trying to compile a program (working on redhat 6.1) on redhat
7.0. The attached program is the example of thread using you can find at
http://www-linux.gsi.de/~go4/HOWTOthreads/howtothreads.html#tth_sEc8.3
I shows the 2 unrelated problems I encounter.
-The first one looks to be related to the fact that the compiler (gcc
version 2.96) doesn't accept anymore the following trick :
mTh= new TThread("memberfunction",
(void(*) (void *))&Thread0,
(void*) this);
on RH6.1, I just get a warning message like:
Myclass.cxx:98: warning: converting from `void (Myclass::*)(void *)' to
`void *' )
on RH7.0, this is unfortunately an error :
TThreadframe.cxx: In method
`Int_t TThreadframe::Threadstart ()': TThreadframe.cxx:129: ISO C++
forbids taking the address of a non-static member function to form a
pointer to
member
function. Say `&TThreadframe::Thread0'
To check that, just untar the attached example, and type make.
- the second problem is the "different exceptions" stuff I was talking
about in a previous email :
As it occurs while compiling another module, you have to modify the
Makefile.
replace the line :
TMhs3run.$(ObjSuf): TMhs3run.cxx libTMhs3.so libTThreadframe.so
by :
TMhs3run.$(ObjSuf): TMhs3run.cxx libTMhs3.so
and make.
TMhs3run.cxx cannot be compiled because :
g++ -g -Wall -ansi -frtti -fexceptions -DR__THREAD -D_THREADLIB_ -fPIC
-I/usr/l ocal/root/include -c
TMhs3run.cxx In file included from /usr/include/math.h:64,
from /usr/local/root/include/G__ci.h:268,
from /usr/local/root/include/TSystem.h:31,
from /usr/local/root/include/TThread.h:38,
from TThreadframe.h:32,
from TMhs3.h:2,
from TMhs3run.cxx:11: /usr/include/bits/mathcalls.h:54:
declaration of `double acos (double) throw ()' throws different
exceptions
/usr/local/root/include/TMath.h:306: than previous declaration `double
acos (double)' /usr/include/bits/mathcalls.h:56: declaration of `double
asin (double) throw ()' throws different exceptions
/usr/local/root/include/TMath.h:305: than previous declaration `double
asin (double)' /usr/include/bits/mathcalls.h:58: declaration of `double
...
In TMath.h, we have the following lines :
#if defined(R__AIX) || defined(R__MAC) || defined(R__SOLARIS_CC50) || \
defined(R__USESTHROW)
// math functions are defined inline so we have to include them here
#include <math.h>
#else // don't want to include complete <math.h>
extern "C" {
extern double sin(double);
extern double cos(double);
extern double tan(double);
extern double sinh(double);
extern double cosh(double);
extern double tanh(double);
extern double asin(double);
extern double acos(double);
extern double atan(double);
extern double atan2(double, double);
extern double sqrt(double);
extern double exp(double);
extern double pow(double, double);
extern double log(double);
extern double log10(double);
}
#endif
The problem comes from the extern declarations. If I replace them by
#include <math.h> the "different exceptions" errors disappear. So
the variable R__USESTHROW is not defined, but should be. I can be done
in the Makefile, but I think it would be better if exceptions work by
default.
cheers,
Colin
--
Colin Bernet
Tel. +49-6131/39-23192
Fax +49-6131/39-22964
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