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dnl --------------------------------------------------------------------------
dnl PA_ADD_CFLAGS()
dnl
dnl Attempt to add the given option to CFLAGS, if it doesn't break compilation
dnl --------------------------------------------------------------------------
AC_DEFUN(PA_ADD_CFLAGS,
[AC_MSG_CHECKING([if $CC accepts $1])
pa_add_cflags__old_cflags="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_TRY_COMPILE([#include <stdio.h>],
[printf("Hello, World!\n");],
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no])
CFLAGS="$pa_add_cflags__old_cflags")])
dnl --------------------------------------------------------------------------
dnl PA_SIGSETJMP
dnl
dnl Do we have sigsetjmp/siglongjmp? (AC_CHECK_FUNCS doesn't seem to work
dnl for these particular functions.)
dnl --------------------------------------------------------------------------
AC_DEFUN(PA_SIGSETJMP,
[AC_MSG_CHECKING([for sigsetjmp])
AC_TRY_LINK(
[#include <setjmp.h>],
[sigjmp_buf buf;
sigsetjmp(buf,1);
siglongjmp(buf,2);],
AC_MSG_RESULT([yes])
$1,
AC_MSG_RESULT([no])
$2)])
dnl --------------------------------------------------------------------------
dnl PA_MSGHDR_MSG_CONTROL
dnl
dnl Does struct msghdr have the msg_control field?
dnl --------------------------------------------------------------------------
AC_DEFUN(PA_MSGHDR_MSG_CONTROL,
[AC_MSG_CHECKING([for msg_control in struct msghdr])
AC_TRY_COMPILE(
[
#include <sys/types.h>
#include <sys/socket.h>
],
[
struct msghdr msg;
void *p = (void *) &msg.msg_control;
],
[
AC_DEFINE(HAVE_MSGHDR_MSG_CONTROL)
AC_MSG_RESULT([yes])
],
[
AC_MSG_RESULT([no])
])])
dnl --------------------------------------------------------------------------
dnl PA_HAVE_TCPWRAPPERS
dnl
dnl Do we have the tcpwrappers -lwrap? This can't be done using AC_CHECK_LIBS
dnl due to the need to provide "allow_severity" and "deny_severity" variables
dnl --------------------------------------------------------------------------
AC_DEFUN(PA_HAVE_TCPWRAPPERS,
[AC_CHECK_LIB([wrap], [main])
AC_MSG_CHECKING([for tcpwrappers])
AC_TRY_LINK(
[
#include <tcpd.h>
int allow_severity = 0;
int deny_severity = 0;
],
[
struct request_info ri;
request_init(&ri, 0);
],
[
AC_DEFINE(HAVE_TCPWRAPPERS)
AC_MSG_RESULT([yes])
],
[
AC_MSG_RESULT([no])
])])
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