add ability to build manpages independent from other documentation choices

Makefile.am

@@ -1,13 +1,21 @@
 # This Makefile.am is in the public domain
 AM_CPPFLAGS = -I$(top_srcdir)/src/include
 
+# only documentation (ALL of the documentation)
 if DOCUMENTATION_ONLY
   SUBDIRS = doc
 else
   SUBDIRS = m4 src po pkgconfig
+endif
+
+# documentation on / off switch (affects all of the documentation)
 if DOCUMENTATION
   SUBDIRS += doc
 endif
+
+# only manpages, needs "doc" subdir
+if INCLUDE_MANPAGES
+  SUBDIRS += doc
 endif
 
 if !TALER_ONLY

configure.ac

@@ -375,6 +375,21 @@ else
   AC_DEFINE([DOCUMENTATION_ONLY],[0],[Not building only the documentation])
 fi
 
+# should the build process be including the manpages? (default: yes)
+AC_MSG_CHECKING(whether to include man pages)
+AC_ARG_ENABLE([include-manpages],
+   [AS_HELP_STRING([--disable-include-manpages], [Do not include the man pages in build and installation])],
+   [include_manpages=${enableval}],
+   [include_manpages=yes])
+AC_MSG_RESULT($include_manpages)
+if test "x$include_manpages" = "xyes"
+then
+  AM_CONDITIONAL([INCLUDE_MANPAGES],true)
+  AC_DEFINE([INCLUDE_MANPAGES],[1],[Including the man pages in the build and installation])
+else
+  AM_CONDITIONAL([INCLUDE_MANPAGES],false)
+  AC_DEFINE([INCLUDE_MANPAGES],[0],[Not including the man pages in the build and installation])
+fi
 
 # Adam shostack suggests the following for Windows:
 # -D_FORTIFY_SOURCE=2 -fstack-protector-all
@@ -1326,6 +1341,7 @@ DATAROOTDIR=$datarootdir
 AC_SUBST(DATAROOTDIR)
 
 # test for sudo
+# TODO: do we need to change anything for "doas" on openbsd?
 AC_MSG_CHECKING(for sudo)
 AC_ARG_WITH(sudo,
   [  --with-sudo=PATH       path to sudo binary (or just yes)],

doc/Makefile.am

@@ -1,9 +1,14 @@
 # This Makefile.am is in the public domain
 if DOCUMENTATION
-  SUBDIRS = man doxygen handbook tutorial
+  SUBDIRS = doxygen handbook tutorial
 endif
+
 if !DOCUMENTATION
-  SUBDIRS = man doxygen
+  SUBDIRS = doxygen
+endif
+
+if INCLUDE_MANPAGES
+  SUBDIRS += man
 endif
 
 EXTRA_DIST =							\