1dnl $Id$ 2dnl 3dnl check for fields in a structure 4dnl 5dnl AC_HAVE_STRUCT_FIELD(struct, field, headers) 6 7AC_DEFUN([AC_HAVE_STRUCT_FIELD], [ 8define(cache_val, translit(ac_cv_type_$1_$2, [A-Z ], [a-z_])) 9AC_CACHE_CHECK([for $2 in $1], cache_val,[ 10AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]], 11 [[$1 x; memset(&x, 0, sizeof(x)); x.$2]])], 12 [cache_val=yes], 13 [cache_val=no]) 14]) 15if test "$cache_val" = yes; then 16 define(foo, translit(HAVE_$1_$2, [a-z ], [A-Z_])) 17 AC_DEFINE(foo, 1, [Define if $1 has field $2.]) 18 undefine([foo]) 19fi 20undefine([cache_val]) 21]) 22