GZIP := gzip -fn9
ZCAT := zcat
+dummy != $(M4) /dev/null || printf 'failed'
+ifeq ($(dummy), failed)
+$(error m4 is required to build this package)
+endif
+dummy != printf '%%%%\n' | $(LEX) -o /dev/null || printf 'failed'
+ifeq ($(dummy), failed)
+$(error (f)lex is required to build this package)
+endif
+
DATE_FMT := +%B %Y
# To get a reproducible build, we use $(SOURCE_DATE_EPOCH) instead of the
# current time if this variable is set.