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Collection of DPF-based plugins for packaging
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DPF-Plugins/plugins/ProM/projectM/m4/autoconf-archive/ax_have_poll.m4

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  1. # ===========================================================================

  2. #       https://www.gnu.org/software/autoconf-archive/ax_have_poll.html

  3. # ===========================================================================

  4. #

  5. # SYNOPSIS

  6. #

  7. #   AX_HAVE_POLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

  8. #   AX_HAVE_PPOLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

  9. #

  10. # DESCRIPTION

  11. #

  12. #   This macro determines whether the system supports the poll I/O event

  13. #   interface. A neat usage example would be:

  14. #

  15. #     AX_HAVE_POLL(

  16. #       [AX_CONFIG_FEATURE_ENABLE(poll)],

  17. #       [AX_CONFIG_FEATURE_DISABLE(poll)])

  18. #     AX_CONFIG_FEATURE(

  19. #       [poll], [This platform supports poll(7)],

  20. #       [HAVE_POLL], [This platform supports poll(7).])

  21. #

  22. #   Some systems -- most notably Linux kernel 2.6.16 and later -- also have

  23. #   the variant ppoll(). The availability of that function can be tested

  24. #   with the second macro. Generally speaking, it is safe to assume that

  25. #   AX_HAVE_POLL would succeed if AX_HAVE_PPOLL has, but not the other way

  26. #   round.

  27. #

  28. # LICENSE

  29. #

  30. #   Copyright (c) 2009 Peter Simons <simons@cryp.to>

  31. #

  32. #   Copying and distribution of this file, with or without modification, are

  33. #   permitted in any medium without royalty provided the copyright notice

  34. #   and this notice are preserved. This file is offered as-is, without any

  35. #   warranty.

  36. 

  37. #serial 8

  38. 

  39. AC_DEFUN([AX_HAVE_POLL], [dnl

  40.   AC_MSG_CHECKING([for poll(2)])

  41.   AC_CACHE_VAL([ax_cv_have_poll], [dnl

  42.     AC_LINK_IFELSE([dnl

  43.       AC_LANG_PROGRAM(

  44.         [#include <poll.h>],

  45.         [int rc; rc = poll((struct pollfd *)(0), 0, 0);])],

  46.       [ax_cv_have_poll=yes],

  47.       [ax_cv_have_poll=no])])

  48.   AS_IF([test "${ax_cv_have_poll}" = "yes"],

  49.     [AC_MSG_RESULT([yes])

  50. $1],[AC_MSG_RESULT([no])

  51. $2])

  52. ])dnl

  53. 

  54. AC_DEFUN([AX_HAVE_PPOLL], [dnl

  55.   AC_MSG_CHECKING([for ppoll(2)])

  56.   AC_CACHE_VAL([ax_cv_have_ppoll], [dnl

  57.     AC_LINK_IFELSE([dnl

  58.       AC_LANG_PROGRAM(

  59.         [dnl

  60. #include <poll.h>

  61. #include <signal.h>],

  62.         [dnl

  63. int rc;

  64. rc = poll((struct pollfd *)(0), 0, 0);

  65. rc = ppoll((struct pollfd *)(0), 0, (struct timespec const *)(0), (sigset_t const *)(0));])],

  66.       [ax_cv_have_ppoll=yes],

  67.       [ax_cv_have_ppoll=no])])

  68.   AS_IF([test "${ax_cv_have_ppoll}" = "yes"],

  69.     [AC_MSG_RESULT([yes])

  70. $1],[AC_MSG_RESULT([no])

  71. $2])

  72. ])