https://github.com/yo8192/fcron/pull/45

Use standard autoconf's --docdir

--- a/configure.in
+++ b/configure.in
@@ -398,26 +398,6 @@ PROC=$proc
 AC_DEFINE_UNQUOTED(PROC, "$proc")
 fi
 
-docdir="${datadir}/doc"
-AC_MSG_CHECKING(location of doc directory)
-AC_ARG_WITH(docdir,
-[  --with-docdir=PATH	Directory containing documentation.],
-[ case "$withval" in
-  no)
-    AC_MSG_ERROR(Need DOCDIR.)
-    ;;
-  yes)
-    ;;
-  *)
-    docdir="$withval"
-    ;;
-  esac ])
-
-AC_MSG_RESULT($docdir)
-DOCDIR="$docdir"
-AC_SUBST(DOCDIR)
-
-
 dnl systemd init system
 SYSTEMD_DIR="no"
 
--- a/doc/Makefile.in
+++ b/doc/Makefile.in
@@ -16,7 +16,7 @@ SRCDIR		= @srcdir@
 prefix		= @prefix@
 datarootdir	= @datarootdir@
 DESTMAN		= @mandir@
-DESTDOC		= @DOCDIR@
+DESTDOC		= @docdir@
 
 INSTALL		= @INSTALL@
 JADE 		= @JADE@
@@ -134,11 +134,11 @@ install-staged: doc-if-none clean
 		done ; \
 	done )
 
-	@(echo "Installing documentation files in $(DESTDIR)$(DESTDOC)/fcron-$(VERSION)...")
-	@(if test ! -d $(DESTDIR)$(DESTDOC)/fcron-$(VERSION); then $(INSTALL) -m 755 -d $(DESTDIR)$(DESTDOC)/fcron-$(VERSION) ; fi)
+	@(echo "Installing documentation files in $(DESTDIR)$(DESTDOC)...")
+	@(if test ! -d $(DESTDIR)$(DESTDOC); then $(INSTALL) -m 755 -d $(DESTDIR)$(DESTDOC) ; fi)
 
 	@(for l in $(LANGUAGES); do \
-		DIR=$(DESTDIR)$(DESTDOC)/fcron-$(VERSION) ; \
+		DIR=$(DESTDIR)$(DESTDOC) ; \
 		if test ! -d $$DIR/$$l; then \
 	$(INSTALL) -m 755 -d $$DIR/$$l ; \
 		fi ; \
@@ -173,10 +173,8 @@ perms:
 	done
 	chown $(ROOTNAME) $(DESTDIR)$(DESTDOC)
 	chgrp $(ROOTGROUP) $(DESTDIR)$(DESTDOC)
-	chown $(ROOTNAME) $(DESTDIR)$(DESTDOC)/fcron-$(VERSION) 
-	chgrp $(ROOTGROUP) $(DESTDIR)$(DESTDOC)/fcron-$(VERSION) 
 	for l in $(LANGUAGES); do \
-		DIR=$(DESTDIR)$(DESTDOC)/fcron-$(VERSION)/$$l ; \
+		DIR=$(DESTDIR)$(DESTDOC)/$$l ; \
 		chown $(ROOTNAME) $$DIR ; \
 		chgrp $(ROOTGROUP) $$DIR ; \
 		for i in txt HTML; do \
@@ -189,7 +187,7 @@ perms:
 
 
 uninstall:
-	rm -fR $(DESTDOC)/fcron-$(VERSION)
+	rm -fR $(DESTDOC)
 	@(echo "Removing man pages ...")
 	@(for l in $(LANGUAGES); do \
 		if test "x$$l" = "xen"; then \