generation of manual pages has been added

Makefile.am

@@ -18,7 +18,7 @@
 
 ACLOCAL_AMFLAGS = -I m4
 
-GRC_SUBDIRS = . src tests
+GRC_SUBDIRS = . doc src tests
 
 SUBDIRS = $(GRC_SUBDIRS)
 DIST_SUBDIRS = $(GRC_SUBDIRS) include m4

configure.ac

@@ -58,6 +58,7 @@ AC_PROG_LN_S
 AC_PROG_MAKE_SET
 AC_PROG_LIBTOOL
 AC_PROG_AWK
+AM_MISSING_PROG([HELP2MAN], [help2man])
 
 AX_PROG_JQ
 AX_PROG_CAT
@@ -180,6 +181,7 @@ AX_MSG_BOLD([Writing output files])
 
 AC_CONFIG_FILES([ \
   Makefile \
+  doc/Makefile \
   m4/Makefile \
   include/Makefile \
   src/Makefile \

doc/Makefile.am

@@ -0,0 +1,32 @@
+############################################################################
+# This file is part of Grenache Command Line Interface.                    #
+#                                                                          #
+# Copyright (C) 2017, 2018 Davide Scola <davide@bitfinex.com>              #
+#                                                                          #
+# Licensed under the Apache License,  Version 2.0 (the "License"); you may #
+# not use this file except in  compliance with the License. You may obtain #
+# a copy of the License at                                                 #
+#                                                                          #
+#       http://www.apache.org/licenses/LICENSE-2.0                         #
+#                                                                          #
+# Unless  required by  applicable law  or agreed  to in  writing, software #
+# distributed  under the  License  is  distributed on  an  "AS IS"  BASIS, #
+# WITHOUT  WARRANTIES  OR  CONDITIONS  OF  ANY  KIND,  either  express  or #
+# implied. See the License for the specific language governing permissions #
+# and limitations under the License.                                       #
+############################################################################
+
+dist_man1_MANS = \
+grenache-get.1 \
+grenache-put.1 \
+grenache-keygen.1 \
+grenache-lookup.1 \
+grenache-announce.1
+
+MAINTAINERCLEANFILES = \
+$(dist_man1_MANS)
+
+%.1: $(top_srcdir)/src/%.in $(top_srcdir)/doc/Makefile.am
+	$(HELP2MAN) --no-info --output=$@ --version-string="$(PACKAGE_VERSION)" \
+		--name="manual page for $(notdir $(basename $<)) ($(PACKAGE_NAME)) $(PACKAGE_VERSION) on $(host_cpu)-$(host_os)" \
+		"${SHELL} $(basename $<)$(EXEEXT)"