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AC_DEFUN(CLIF_SVR_SIGS,
[AC_MSG_CHECKING(for SVR signals)
AC_CACHE_VAL(clif_cv_sigs,
[AC_TRY_LINK(
[#include<stdio.h>
#include<$op_signal>
#include<$op_termio>
#include<$op_fcntl>],
[sigset(SIGINT,(void *)NULL);],
clif_cv_sigs=yes,
clif_cv_sigs=no)])
AC_MSG_RESULT($clif_cv_sigs)])
AC_DEFUN(CLIF_SVR3_TERM,
[AC_MSG_CHECKING(for SVR3 features)
AC_CACHE_VAL(clif_cv_lnctl,
[AC_TRY_LINK(
[#include<$op_termio>],
[int x = LNEW_CTLECH;],
clif_cv_lnctl=yes,
clif_cv_lnctl=no)])
AC_MSG_RESULT($clif_cv_lnctl)])
AC_DEFUN(CLIF_BSD_SIG,
[AC_MSG_CHECKING(for old-BSD signals)
AC_CACHE_VAL(clif_cv_sigv,
[AC_TRY_LINK([#include<stdio.h>
#include<$op_signal>
#include<$op_termio>
#include<$op_fcntl>],
[struct sigvec vec,ovec; sigvec(SIGINT,&vec,&ovec);],
clif_cv_sigv=yes,
clif_cv_sigv=no)])
AC_MSG_RESULT($clif_cv_sigv)])
AC_DEFUN(CLIF_LINUX_SIG,
[AC_MSG_CHECKING(for Linux signals)
AC_CACHE_VAL(clif_cv_lsig,
[AC_TRY_COMPILE([#include</usr/include/stdio.h>
#include</usr/include/bsd/signal.h>
#include</usr/include/$op_termio>
#include</usr/include/$op_fcntl>],
[struct sigvec vec,ovec; sigvec(SIGINT,&vec,&ovec);],
ADD_OBJS="$ADD_OBJS inter_handl_lin.o"
ADD_FORK="$ADD_FORK \$(srcdir)/sigig_lin.c"
ADD_IDIR="$ADD_IDIR -I/usr/include"
AC_TRY_LINK([#include</usr/include/stdio.h>
#include</usr/include/bsd/signal.h>
#include</usr/include/$op_termio>
#include</usr/include/$op_fcntl>],
[ioctl (stdin, TIOCSTI, "\n");],
AC_DEFINE(HAVE_TIOCSTI))
clif_cv_lsig=yes,
clif_cv_lsig=no)])
AC_MSG_RESULT($clif_cv_lsig)])
AC_DEFUN(CLIF_POSIX_SIG,
[AC_MSG_CHECKING(if it is a true POSIXized system)
AC_CACHE_VAL(clif_cv_psig,
[AC_TRY_COMPILE([#include <stdio.h>
#include <$op_signal>
#include <$op_termio>],
[struct termios term;
struct sigaction act, oact;
int fd;
tcgetattr (fd, &term);
sigemptyset (&act.sa_mask);
sigaction (SIGINT, &act, &oact);],
clif_cv_psig=yes,
clif_cv_psig=no)])
AC_MSG_RESULT($clif_cv_psig)])
AC_DEFUN(CLIF_MAX_ALIGNMENT,
[AC_MSG_CHECKING(for default alignment)
AC_CACHE_VAL(clif_cv_align,
[AC_TRY_RUN(
[#include <stdio.h>
struct foo {
int a;
double b;};
int main () {
exit ((int)&((struct foo *)0)->b != sizeof (int));}],
clif_cv_align=4,
clif_cv_align=8,
clif_cv_align=8)])
if test $clif_cv_align -eq 4; then
AC_DEFINE(MAX_ALIGNMENT, 4)
else
AC_DEFINE(MAX_ALIGNMENT, 8)
fi
AC_MSG_RESULT($clif_cv_align)])
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