enum="$(for i in $write_writers; do printf "${i}_WRITE, " | tr '[a-z]' '[A-Z]'; done)"
AC_DEFINE_UNQUOTED(WRITER_ENUM, $enum NUM_SUPPORTED_WRITERS,
enum of supported writers)
-names="$(for i in $write_writers; do printf '\"'$i'\", ' ; done)"
+names="$(for i in $write_writers; do printf \"$i\",' ' ; done)"
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)