1*b40995a4Selricdnl Id 2ca1c9b0cSelricdnl 3ca1c9b0cSelricdnl check for fields in a structure 4ca1c9b0cSelricdnl 5ca1c9b0cSelricdnl AC_HAVE_STRUCT_FIELD(struct, field, headers) 6ca1c9b0cSelric 7ca1c9b0cSelricAC_DEFUN([AC_HAVE_STRUCT_FIELD], [ 8ca1c9b0cSelricdefine(cache_val, translit(ac_cv_type_$1_$2, [A-Z ], [a-z_])) 9ca1c9b0cSelricAC_CACHE_CHECK([for $2 in $1], cache_val,[ 10ca1c9b0cSelricAC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]], 11ca1c9b0cSelric [[$1 x; memset(&x, 0, sizeof(x)); x.$2]])], 12ca1c9b0cSelric [cache_val=yes], 13ca1c9b0cSelric [cache_val=no]) 14ca1c9b0cSelric]) 15ca1c9b0cSelricif test "$cache_val" = yes; then 16ca1c9b0cSelric define(foo, translit(HAVE_$1_$2, [a-z ], [A-Z_])) 17ca1c9b0cSelric AC_DEFINE(foo, 1, [Define if $1 has field $2.]) 18ca1c9b0cSelric undefine([foo]) 19ca1c9b0cSelricfi 20ca1c9b0cSelricundefine([cache_val]) 21ca1c9b0cSelric]) 22