File: [local] / OpenXM_contrib / gnuplot / m4 / Attic / select.m4 (download)
Revision 1.1.1.2 (vendor branch), Mon Sep 15 07:09:33 2003 UTC (20 years, 11 months ago) by ohara
Branch: GNUPLOT
CVS Tags: VERSION_3_7_3, RELEASE_1_2_3, RELEASE_1_2_2_KNOPPIX_b, RELEASE_1_2_2_KNOPPIX Changes since 1.1.1.1: +23 -20
lines
Import gnuplot 3.7.3
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dnl testing new version of FUNC_SELECT
AC_DEFUN(AC_FUNC_SELECT,
[AC_CHECK_FUNCS(select)
if test "$ac_cv_func_select" = yes; then
AC_CHECK_HEADERS(unistd.h sys/types.h sys/time.h sys/select.h sys/socket.h)
AC_MSG_CHECKING([argument types of select()])
AC_CACHE_VAL(ac_cv_type_fd_set_size_t,
[AC_CACHE_VAL(ac_cv_type_fd_set,
[for ac_cv_type_fd_set in 'fd_set' 'int' 'void'; do
for ac_cv_type_fd_set_size_t in 'int' 'size_t' 'unsigned long' 'unsigned'; do
for ac_type_timeval in 'struct timeval' 'const struct timeval'; do
AC_TRY_COMPILE(
[#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
],
[#ifdef __STDC__
extern int select ($ac_cv_type_fd_set_size_t,
$ac_cv_type_fd_set *, $ac_cv_type_fd_set *, $ac_cv_type_fd_set *,
$ac_type_timeval *);
#else
extern int select ();
$ac_cv_type_fd_set_size_t s;
$ac_cv_type_fd_set *p;
$ac_type_timeval *t;
#endif
],
[ac_found=yes ; break 3],ac_found=no)
done
done
done
])dnl AC_CACHE_VAL
])dnl AC_CACHE_VAL
if test "$ac_found" = no; then
AC_MSG_ERROR([can't determine argument types])
fi
AC_MSG_RESULT([select($ac_cv_type_fd_set_size_t,$ac_cv_type_fd_set *,...)])
AC_DEFINE_UNQUOTED(fd_set_size_t, $ac_cv_type_fd_set_size_t,
[ First arg for select. ])
ac_cast=
if test "$ac_cv_type_fd_set" != fd_set; then
# Arguments 2-4 are not fd_set. Some weirdo systems use fd_set type for
# FD_SET macros, but insist that you cast the argument to select. I don't
# understand why that might be, but it means we cannot define fd_set.
AC_EGREP_CPP(
changequote(<<,>>)dnl
<<(^|[^a-zA-Z_0-9])fd_set[^a-zA-Z_0-9]>>dnl
changequote([,]),dnl
[#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
],
# We found fd_set type in a header, need special cast
ac_cast="($ac_cv_type_fd_set *)",dnl
# No fd_set type; it is safe to define it
AC_DEFINE_UNQUOTED(fd_set,$ac_cv_type_fd_set,
[ Define if the type in arguments 2-4 to select is fd_set. ]))
fi
AC_DEFINE_UNQUOTED(SELECT_FD_SET_CAST,$ac_cast,
[ Define if the type in arguments 2-4 to select is fd_set. ])
fi
])