It seems that maybe we can just say the whole problem comes down to that rand() from dynamically linked libc.so.6 is slower to execute than what is supposed to be the same code statically linked.
Yes, glibc is under suspicion. There are several indications ...
If you can't get random_r() to work (see eg http://refspecs.freestandards.org/LSB_1.2.0/gLSB/baselib-random-r-3.html
I am trying to implement random_r function. This is my try: ### prueba.c ##################################################### #include <stdio.h> #include <stdlib.h> int32_t r; struct random_data rand_data; int main(int argc, char ** argv) { random_r(&rand_data, &r); printf("%d\n", (int)r); return (0); } ### prueba.c (the end) ########################################### But I obtain this result: # gcc prueba.c -o prueba -Wall -pedantic # ./prueba Segmentation fault I am doing something wrong. Any hint? Thanks!