gp2c malloc trouble

["Alain SMEJKAL" <a.smejkal@free.fr>]

Dear list,

I have some trouble to add my own malloc'ed data into a gp2c source. When
running with GP, I have to extend the stack many more than logically
required.
4 Mb stack enable only to malloc 43 Kb, 8Mb -> 97 Kb
What's wrong ?

Regards,

Alain

PS : configuration is Cygwin with pari-2.4.0.alpha and gp2c-0.0.5pl6

Sample of  the malloc code :

unsigned char    *bits;
...
if ((bits = malloc(bitsize)) == NULL)
    pari_err(talker, "invalid size parameter");
...
free(bits);