Allow excluding documentation from the build

changes/ticket19381

+  o Minor features (build system):
+    - Add --disable-manpage and --disable-html-manual options to configure
+      script. This will enable shortening build times by not building
+      documentation. Resolves issue 19381.

configure.ac

@@ -105,6 +105,12 @@ if test "$enable_memory_sentinels" = "no"; then
            [Defined if we're turning off memory safety code to look for bugs])
 fi
 
+AC_ARG_ENABLE(manpage,
+              AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))
+
+AC_ARG_ENABLE(html-manual,
+              AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))
+
 AC_ARG_ENABLE(asciidoc,
      AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
      [case "${enableval}" in
@@ -299,6 +305,8 @@ AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
 AC_PATH_PROGS([A2X], [a2x a2x.py], none)
 
 AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
+AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
+AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
 
 AM_PROG_CC_C_O
 AC_PROG_CC_C99

doc/include.am

@@ -15,17 +15,32 @@
 all_mans = doc/tor doc/tor-gencert doc/tor-resolve doc/torify doc/tor-print-ed-signing-cert
 
 if USE_ASCIIDOC
-nodist_man1_MANS = $(all_mans:=.1)
-doc_DATA = $(all_mans:=.html)
+txt_in = $(all_mans:=.1.txt)
+
+if BUILD_HTML_DOCS
 html_in = $(all_mans:=.html.in)
+doc_DATA = $(all_mans:=.html)
+else
+html_in =
+doc_DATA =
+endif
+
+if BUILD_MANPAGE
+nodist_man1_MANS = $(all_mans:=.1)
 man_in = $(all_mans:=.1.in)
-txt_in = $(all_mans:=.1.txt)
 else
+nodist_man1_MANS =
+man_in =
+endif
+
+else
+
 html_in =
+doc_DATA =
 man_in =
 txt_in =
 nodist_man1_MANS =
-doc_DATA =
+
 endif
 
 EXTRA_DIST+= doc/asciidoc-helper.sh			\