AC_DEFINE_UNQUOTED(WRITER_NAMES, $names, supported writer names)
inits="$(for i in $write_writers; do printf 'extern void '$i'_writer_init(struct writer *); '; done)"
AC_DEFINE_UNQUOTED(DECLARE_WRITER_INITS, $inits, init functions of the supported writers)
AC_DEFINE_UNQUOTED(WRITER_NAMES, $names, supported writer names)
inits="$(for i in $write_writers; do printf 'extern void '$i'_writer_init(struct writer *); '; done)"
AC_DEFINE_UNQUOTED(DECLARE_WRITER_INITS, $inits, init functions of the supported writers)