[Guidolib-devel] 64 bit platform related bugs

[Bart S. <rhi...@gm...>]

Hi there,

I tried to compile guidolib 1.37 on 64bit Linux today, but ran into
some problems:


In src/graphic/GRSingleNote.cpp:

../src/graphic/GRSingleNote.cpp: In member function ‘virtual char*
GRSingleNote::getGGSInfo(int) const’:
../src/graphic/GRSingleNote.cpp:143: error: cast from ‘const
GRSpring*’ to ‘int’ loses precision
../src/graphic/GRSingleNote.cpp:145: error: cast from ‘const
GRSpring*’ to ‘int’ loses precision
../src/graphic/GRSingleNote.cpp: In member function ‘virtual void
GRSingleNote::GGSOutput() const’:
../src/graphic/GRSingleNote.cpp:180: error: cast from ‘const
GRSingleNote*’ to ‘int’ loses precision
../src/graphic/GRSingleNote.cpp:190: error: cast from ‘const
GRSingleNote*’ to ‘int’ loses precision

Line 143, 145: prevspring and nextspring should be casted to long int
instead of int. Furthermore, snprintf's format string should use %ld
instead of %d.
Line 180, 190: el->setID should both cast to long int instead of int.


In ../src/graphic/GRTempo.cpp:

../src/graphic/GRTempo.cpp: In member function ‘void
GRTempo::DrawText(VGDevice&, const char*, float, float, float*)
const’:
../src/graphic/GRTempo.cpp:237: error: ‘strlen’ was not declared in this scope

This file should include string.h


After fixing this compilation of the static library went fine, but I
was looking for a dynamic library (to load from within Python). Some
changes in the Makefile gave me one eventually, but when I tried to
load it, it immediately segfaulted. I'm not sure if this was also a 64
bit related issue or that I screwed something up, but it did raise
some questions regarding the cross-platformness of it all. My question
is basically: is 64 bit supported or should I stop trying to get it to
run and try to compile it with 32 bit libs?

I was recommended to try out this library, because we are looking for
cross platform functions that can draw music notation in real-time
(say, for use in applications like music editors) and this library
could supposedly do it. It would be great if it did, but at this point
I unfortunately can't test this premise. Would this be possible and if
so are there some docs available regarding GUIDOLib's internals?

Thanks in advance
Best regards,
Bart Spaans