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Added a check in configure that verifies if <signal.h> is available,

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defining HAVE_SIGNAL_H if the header is available.

Added a check in configure that tests if the sig_atomic_t type is
available, defining HAVE_SIG_ATOMIC_T if it is available. Providing
a suitable default in setup_once.h if not available.

Added a check in configure that tests if the sig_atomic_t type is
already defined as volatile, defining HAVE_SIG_ATOMIC_T_VOLATILE
if it is available and already defined as volatile.
This commit is contained in:
Yang Tse
2006-11-22 18:41:34 +00:00
parent ab160ef445
commit 73226415fc
6 changed files with 108 additions and 0 deletions
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42
acinclude.m4
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@@ -1035,6 +1035,48 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
]) # AC_DEFUN
dnl TYPE_SIG_ATOMIC_T
dnl -------------------------------------------------
dnl Check if the sig_atomic_t type is available, and
dnl verify if it is already defined as volatile.
AC_DEFUN([TYPE_SIG_ATOMIC_T], [
AC_CHECK_HEADERS(signal.h)
AC_CHECK_TYPE([sig_atomic_t],[
AC_DEFINE(HAVE_SIG_ATOMIC_T, 1,
[Define to 1 if sig_atomic_t is an available typedef.])
], ,[
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
])
case "$ac_cv_type_sig_atomic_t" in
yes)
#
AC_MSG_CHECKING([if sig_atomic_t is already defined as volatile])
AC_TRY_LINK([
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
],[
static volatile sig_atomic_t dummy = 0;
],[
AC_MSG_RESULT([no])
ac_cv_sig_atomic_t_volatile="no"
],[
AC_MSG_RESULT([yes])
ac_cv_sig_atomic_t_volatile="yes"
])
#
if test "$ac_cv_sig_atomic_t_volatile" = "yes"; then
AC_DEFINE(HAVE_SIG_ATOMIC_T_VOLATILE, 1,
[Define to 1 if sig_atomic_t is already defined as volatile.])
fi
;;
esac
]) # AC_DEFUN
dnl CURL_CHECK_NONBLOCKING_SOCKET
dnl -------------------------------------------------
dnl Check for how to set a socket to non-blocking state. There seems to exist