I load an engine into Stunnel to access the private key. The engine loads without incident, but Stunnel consistently aborts when creating a session with the first peer because the thread stack is too small. I rebuilt Stunnel 4.21 on my test machine after increasing the stack size parameter and it fixed the problem. Here is the diff: --------------------- # diff -b common.h common.h_orig 33c33 < #define STACK_SIZE 32768*4 ---

#define STACK_SIZE 32768 42c42 < #define STACK_SIZE 65536*4

#define STACK_SIZE 65536

Could this enhancement be included in the next Stunnel release? Regards, Rich