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Stack alignement with pthreads

Hi all,

To make a long story short, I've got a problem with stack alignment in threads
created by pthread_create() and compiled with gcc, running a recent -curent.

It *seems* that the stack of pthreads is always offset by 4 bytes, thus messing
up the gcc aligment efforts. Below is a short program that illustrates this.

Any hint?

# cat test.c
#include <stdio.h>
#include <pthread.h>

void *
test(void *data)
  int test __attribute__((aligned(16)));
  printf("%p\n", &test);

  pthread_t tg;

  pthread_create(&tg, NULL, test, NULL);
  pthread_join(tg, NULL);
  return 0;
# gcc -o test test.c -pthread
# ./test


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