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

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

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

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

  4. #

  5. # SYNOPSIS

  6. #

  7. #   AX_FUNC_MEMMOVE

  8. #

  9. # DESCRIPTION

  10. #

  11. #   Checks for a memmove that can handle overlaps correctly. If no working

  12. #   memmove is found, request a replacement and warn the user about it.

  13. #

  14. # LICENSE

  15. #

  16. #   Copyright (c) 2008 Ruediger Kuhlmann <info@ruediger-kuhlmann.de>

  17. #

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

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

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

  21. #   warranty.

  22. 

  23. #serial 6

  24. 

  25. AU_ALIAS([AC_FUNC_MEMMOVE], [AX_FUNC_MEMMOVE])

  26. AC_DEFUN([AX_FUNC_MEMMOVE],

  27. [AC_CHECK_FUNCS(memmove)

  28. AC_MSG_CHECKING(for working memmove)

  29. AC_CACHE_VAL(ac_cv_have_working_memmove,

  30. [AC_TRY_RUN(

  31. [#include <stdio.h>

  32. 

  33. int main(void)

  34. {

  35.     char buf[10];

  36.     strcpy (buf, "01234567");

  37.     memmove (buf, buf + 2, 3);

  38.     if (strcmp (buf, "23434567"))

  39.         exit (1);

  40.     strcpy (buf, "01234567");

  41.     memmove (buf + 2, buf, 3);

  42.     if (strcmp (buf, "01012567"))

  43.         exit (1);

  44.     exit (0);

  45. }], ac_cv_have_working_memmove=yes, ac_cv_have_working_memmove=no, ac_cv_have_working_memmove=cross)])

  46. AC_MSG_RESULT([$ac_cv_have_working_memmove])

  47. if test x$ac_cv_have_working_memmove != "xyes"; then

  48.   AC_LIBOBJ(memmove)

  49.   AC_MSG_WARN([Replacing missing/broken memmove.])

  50.   AC_DEFINE(PREFER_PORTABLE_MEMMOVE, 1, "enable replacement memmove if system memmove is broken or missing")

  51. fi])