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* [newlib-cygwin] Cygwin: Conditionally build documentation
@ 2021-12-20 14:02 Jon TURNEY
  0 siblings, 0 replies; only message in thread
From: Jon TURNEY @ 2021-12-20 14:02 UTC (permalink / raw)
  To: cygwin-cvs;h=f4a26ececa180cec70c41b6dd2082ff730f92065

commit f4a26ececa180cec70c41b6dd2082ff730f92065
Author: Jon Turney <>
Date:   Tue Dec 7 14:05:34 2021 +0000

    Cygwin: Conditionally build documentation
    Add a configure option '--disable-doc' to disable building of the
    documentation by the 'all' target.
    Check for the required tools at configure time, and require them if
    building documentation is enabled.
    Even if building the documentation was diabled with '--disable-doc',
    'make -C doc' at the top-level can still make the documentation, if the
    documentation tools were found. If the tools were not found, 'missing'
    is used to issue a warning about that.
    Update instructions for building Cygwin appropriately.
    (Building documentation remains the default to increase the chances of
    noticing when building the documentation is broken.)

 winsup/             |  6 +++++-
 winsup/            | 25 ++++++++++++++++++++++++-
 winsup/doc/         |  2 +-
 winsup/doc/faq-programming.xml | 14 +++++++++-----
 4 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/winsup/ b/winsup/
index 067f74688..9efdd4cb1 100644
--- a/winsup/
+++ b/winsup/
@@ -14,6 +14,10 @@ cygdoc_DATA = \
-SUBDIRS = cygwin cygserver doc utils testsuite
+SUBDIRS = cygwin cygserver utils testsuite
+SUBDIRS += doc
 cygserver utils testsuite: cygwin
diff --git a/winsup/ b/winsup/
index cf1128b37..4ae20509a 100644
--- a/winsup/
+++ b/winsup/
@@ -88,7 +88,30 @@ AC_SUBST(TLSOFFSETS_H)
 AM_CONDITIONAL(TARGET_X86_64, [test $target_cpu = "x86_64"])
-AC_CHECK_PROGS([DOCBOOK2XTEXI], [docbook2x-texi db2x_docbook2texi], [true])
+	      [AS_HELP_STRING([--enable-doc], [Build documentation])],,
+	      enable_doc=yes)
+AM_CONDITIONAL(BUILD_DOC, [test $enable_doc != "no"])
+AC_CHECK_PROGS([DOCBOOK2XTEXI], [docbook2x-texi db2x_docbook2texi])
+if test -z "$DOCBOOK2XTEXI" ; then
+    if test "x$enable_doc" != "xno"; then
+        AC_MSG_ERROR([docbook2texi is required to build documentation])
+    else
+        unset DOCBOOK2XTEXI
+        AM_MISSING_PROG([DOCBOOK2XTEXI], [docbook2texi])
+    fi
+if test -z "$XMLTO"; then
+    if test "x$enable_doc" != "xno"; then
+        AC_MSG_ERROR([xmlto is required to build documentation])
+    else
+        unset XMLTO
+        AM_MISSING_PROG([XMLTO], [xmlto])
+    fi
 if test "x$with_cross_bootstrap" != "xyes"; then
     AC_CHECK_PROGS(MINGW_CXX, ${target_cpu}-w64-mingw32-g++)
diff --git a/winsup/doc/ b/winsup/doc/
index 534d67480..5164c6e0a 100644
--- a/winsup/doc/
+++ b/winsup/doc/
@@ -16,7 +16,7 @@ doc_DATA = \
 htmldir = $(datarootdir)/doc
-XMLTO=xmlto --skip-validation --with-dblatex
+XMLTO=@XMLTO@ --skip-validation --with-dblatex
 DOCBOOK2XTEXI=@DOCBOOK2XTEXI@ --xinclude --info --utf8trans-map=charmap
 -include Makefile.dep
diff --git a/winsup/doc/faq-programming.xml b/winsup/doc/faq-programming.xml
index 26fcfe921..46dd23ab8 100644
--- a/winsup/doc/faq-programming.xml
+++ b/winsup/doc/faq-programming.xml
@@ -689,12 +689,16 @@ Building for 32-bit Cygwin also requires
 Building for 64-bit Cygwin also requires
 <literal>mingw64-x86_64-gcc-g++</literal> and
 <!-- If you want to run the tests, <literal>dejagnu</literal> is also required. -->
-Normally, building ignores any errors in building the documentation,
-which requires the <literal>dblatex</literal>, <literal>docbook2X</literal>,
-<literal>docbook-xml45</literal>, <literal>docbook-xsl</literal>, and
-<literal>xmlto</literal> packages.  For more information on building the
-documentation, see the README included in the <literal>cygwin-doc</literal> package.
+Building the documentation also requires the <literal>dblatex</literal>,
+<literal>docbook2X</literal>, <literal>docbook-xml45</literal>,
+<literal>docbook-xsl</literal>, and <literal>xmlto</literal> packages.  Building
+the documentation can be disabled with the <literal>--disable-doc</literal>
+option to <literal>configure</literal>.
 <para>Next, check out the Cygwin sources from the

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