acinclude.m4

   1 #######################
   2 # type alignment test #
   3 #######################
   4
   5 AC_DEFUN([DBIND_CHECK_ALIGNOF],
   6         [changequote(<<, >>)dnl
   7         dnl The name to #define.
   8         define(<<AC_TYPE_NAME>>,
   9                 translit(dbind_alignof_$1, [a-z *], [A-Z_P]))dnl
  10         dnl The cache variable name.
  11         define(<<AC_CV_NAME>>,
  12                 translit(ac_cv_alignof_$1, [ *], [_p]))dnl
  13         changequote([, ])dnl
  14         AC_MSG_CHECKING(alignment of $1)
  15         AC_CACHE_VAL(AC_CV_NAME,
  16                 [AC_TRY_RUN(
  17                         [ #include <stdio.h>
  18                           #include <stdlib.h>
  19                           #define DBUS_API_SUBJECT_TO_CHANGE
  20                           #include <dbus/dbus.h>
  21                         typedef struct {char s1;} dbind_struct;
  22                         typedef void *dbind_pointer;
  23                         struct test {char s1; $1 s2;};
  24                         main()
  25                         {
  26                         FILE *f=fopen("conftestval", "w");
  27                         if (!f) exit(1);
  28                         fprintf(f, "%d\n", &(((struct test*)0)->s2));
  29                         exit(0);
  30                         } ],
  31                         AC_CV_NAME=`cat conftestval`,
  32                         AC_CV_NAME=0, AC_CV_NAME=0)
  33                 ])dnl
  34         AC_MSG_RESULT($AC_CV_NAME)
  35         if test "$AC_CV_NAME" = "0" ; then
  36                 AC_MSG_ERROR([Failed to find alignment. Check config.log for details.])
  37         fi
  38         AC_TYPE_NAME=$AC_CV_NAME
  39         AC_SUBST(AC_TYPE_NAME)
  40         undefine([AC_TYPE_NAME])dnl
  41         undefine([AC_CV_NAME])dnl
  42 ])
  43