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

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

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

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

  4. #

  5. # SYNOPSIS

  6. #

  7. #   AX_EXT_CHECK_HEADER(<header>, <paths>).

  8. #

  9. # DESCRIPTION

  10. #

  11. #   Check for <header> with -I<path> for each path in <paths> if need be.

  12. #   The first sucecssful path is chosen (eg if you say

  13. #   AX_EXT_CHECK_HEADER(foo.h, bar baz qux) and -Ibaz works then -Iqux will

  14. #   not be tested.

  15. #

  16. #   Any -I flags that locate a header are added to CFLAGS and CPPFLAGS. AS

  17. #   with AC_CHECK_HEADERS it causes HAVE_<header>_H to be defined as 1.

  18. #

  19. #   Example:

  20. #

  21. #    AX_EXT_HAVE_HEADER(openssl/rsa.h, /usr/local/include /usr/local/ssl/include /usr/local/openssl/include)

  22. #

  23. # LICENSE

  24. #

  25. #   Copyright (c) 2008 Duncan Simpson <dps@simpson.demon.co.uk>

  26. #

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

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

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

  30. #   warranty.

  31. 

  32. #serial 8

  33. 

  34. AC_DEFUN([AX_EXT_HAVE_HEADER],

  35. [AC_LANG_PUSH(C)

  36.  AC_CHECK_HEADER($1, [$3 got="yes"], [$4 got="no"], $5)

  37.  hdr=`echo $1 | $as_tr_sh`

  38.  for dir in $2; do

  39.   if test "x${got}" = "xno"; then

  40.    ext_hashdr_cvdir=`echo $dir | $as_tr_sh`

  41.    AC_CACHE_CHECK([for $1 library with -I$dir],

  42.     [ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}],

  43.     [ext_have_hdr_save_cflags=${CFLAGS}

  44.      CFLAGS="${CFLAGS} -I${dir}"

  45.      AC_COMPILE_IFELSE(

  46.       [AC_LANG_PROGRAM([#inc[]lude <$1>])],

  47.        [got="yes"; eval "ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}"="yes"],

  48.        [got="no"; eval "ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}"="no"])

  49.       CFLAGS=$ext_have_hdr_save_cflags])

  50.      if eval `echo 'test x${'ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}'}' = "xyes"`; then

  51.       CFLAGS="${CFLAGS} -I${dir}"

  52.       CPPFLAGS="${CPPFLAGS} -I${dir}"

  53.       got="yes";

  54.       hdr=`echo $1 | $as_tr_cpp`

  55.       AC_DEFINE_UNQUOTED(HAVE_${hdr}, 1,

  56.        [Define this if you have the $1 header])

  57.   fi; fi; done

  58. AC_LANG_POP])