src/cf/have-struct-field.m4

   1 dnl Borrowed from Heimdal, but renamed as I don't think we
   2 dnl should be shipping AC_ macros.
   3
   4 AC_DEFUN([OPENAFS_HAVE_STRUCT_FIELD], [
   5 define(cache_val, translit(ac_cv_type_$1_$2, [A-Z ], [a-z_]))
   6 AC_CACHE_CHECK([for $2 in $1], cache_val,[
   7 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]],
   8         [[$1 x; memset(&x, 0, sizeof(x)); x.$2]])],
   9         [cache_val=yes],
  10         [cache_val=no])
  11 ])
  12 if test "$cache_val" = yes; then
  13         define(foo, translit(HAVE_$1_$2, [a-z ], [A-Z_]))
  14         AC_DEFINE(foo, 1, [Define if $1 has field $2.])
  15         undefine([foo])
  16 fi
  17 undefine([cache_val])
  18 ])
  19