986ba33c7a
I've been holding back on this because 1.7.0 requires OpenSSL 1.1.0 or newer for full DANE support. But we can't wait forever, and nothing in base uses DANE anyway, so here we go.
73 lines
2.2 KiB
Plaintext
73 lines
2.2 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_have_poll.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_HAVE_POLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# AX_HAVE_PPOLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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#
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# DESCRIPTION
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#
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# This macro determines whether the system supports the poll I/O event
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# interface. A neat usage example would be:
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#
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# AX_HAVE_POLL(
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# [AX_CONFIG_FEATURE_ENABLE(poll)],
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# [AX_CONFIG_FEATURE_DISABLE(poll)])
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# AX_CONFIG_FEATURE(
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# [poll], [This platform supports poll(7)],
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# [HAVE_POLL], [This platform supports poll(7).])
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#
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# Some systems -- most notably Linux kernel 2.6.16 and later -- also have
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# the variant ppoll(). The availability of that function can be tested
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# with the second macro. Generally speaking, it is safe to assume that
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# AX_HAVE_POLL would succeed if AX_HAVE_PPOLL has, but not the other way
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# round.
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#
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# LICENSE
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#
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# Copyright (c) 2009 Peter Simons <simons@cryp.to>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 7
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AC_DEFUN([AX_HAVE_POLL], [dnl
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AC_MSG_CHECKING([for poll(2)])
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AC_CACHE_VAL([ax_cv_have_poll], [dnl
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AC_LINK_IFELSE([dnl
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AC_LANG_PROGRAM(
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[#include <poll.h>],
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[int rc; rc = poll((struct pollfd *)(0), 0, 0);])],
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[ax_cv_have_poll=yes],
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[ax_cv_have_poll=no])])
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AS_IF([test "${ax_cv_have_poll}" = "yes"],
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[AC_MSG_RESULT([yes])
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$1],[AC_MSG_RESULT([no])
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$2])
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])dnl
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AC_DEFUN([AX_HAVE_PPOLL], [dnl
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AC_MSG_CHECKING([for ppoll(2)])
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AC_CACHE_VAL([ax_cv_have_ppoll], [dnl
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AC_LINK_IFELSE([dnl
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AC_LANG_PROGRAM(
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[dnl
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#include <poll.h>
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#include <signal.h>],
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[dnl
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int rc;
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rc = poll((struct pollfd *)(0), 0, 0);
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rc = ppoll((struct pollfd *)(0), 0, (struct timespec const *)(0), (sigset_t const *)(0));])],
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[ax_cv_have_ppoll=yes],
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[ax_cv_have_ppoll=no])])
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AS_IF([test "${ax_cv_have_ppoll}" = "yes"],
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[AC_MSG_RESULT([yes])
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$1],[AC_MSG_RESULT([no])
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$2])
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])
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