# AIX declares sig_atomic_t to already include volatile, and C89 compilers
# then choke on 'volatile sig_atomic_t'. C99 requires that it compile.
AC_CHECK_TYPE([volatile sig_atomic_t], [],
[HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
#include <signal.h>
]])
# AIX declares sig_atomic_t to already include volatile, and C89 compilers
# then choke on 'volatile sig_atomic_t'. C99 requires that it compile.
AC_CHECK_TYPE([volatile sig_atomic_t], [],
[HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
#include <signal.h>
]])