[vorbis-dev] segfault cause found
scsiprog at hotmail.com
Wed Apr 19 00:57:01 PDT 2000
>Ah. MSVC requires _alloca() as a synonym for *NIX alloca(). This must be
>internal function in mingw32 that I shouldn't use.
I think it's more a bug in mingw32. Without the prototype, it just
subtracts x bytes from the stack pointer to allocate space. The function
version seems to do so as well -- the stack pointer has changed upon return
from _alloca() -- but something's not quite right in all cases. If I have
some more time, I'll probably look at it.
In any case, why the function doesn't work is irrelevant. :-)
>The obvious fault is me using #ifdef _WIN32 in os.h. Is, perhaps, _MSVC_
>somethign like that a better idea?
Perhaps a configuration option, like
#define NEED_UNDERSCORE_ALLOCA 0
# define alloca(x) (_alloca(x))
Each OS/compiler could have its own config.h -- it would be easier than
trying to find what symbols have to be #define'd by different compilers.
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