ocl-icd: Disable manpage generation

Manpage generation using(a2x) xmllint, which needs network to download xml DTD.
Fails with below error:

| a2x: executing: "xmllint" --nonet --noout --valid "/home/avalluri/ostro-os-xt/build/tmp-glibc/work/corei7-64-ostro-linux/ocl-icd/2.2.9-r0/ocl-icd-2.2.9/doc/libOpenCL.7.xml"
|
| I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd
| /home/avalluri/ostro-os-xt/build/tmp-glibc/work/corei7-64-ostro-linux/ocl-icd/2.2.9-r0/ocl-icd-2.2.9/doc/libOpenCL.7.xml:2: warning: failed to load external entity "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"
| D DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"
|                                                                                ^

Patched configure.ac to add config option to enable/disable document generation.

Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com>

Author: avalluri

meta-ostro-xt/recipes-opencl/ocl-icd/ocl-icd/configurable-doc-generation.patch

@@ -0,0 +1,25 @@
+diff --git a/configure.ac b/configure.ac
+index 264d6e0..eb54bb2 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -30,9 +30,17 @@ AC_PROG_INSTALL
+ AC_PROG_LN_S
+ AM_PROG_CC_C_O
+ 
+-AC_PATH_PROG([ASCIIDOC], [asciidoc], [])
+-AC_PATH_PROG([A2X], [a2x], [])
+-AC_PATH_PROG([XMLTO], [xmlto], [])
++AC_ARG_ENABLE([doc],
++  [AS_HELP_STRING([--enable-doc],
++               [Generate documentation])],
++  [generate_doc=$enableval],
++  [generate_doc=no])
++
++if test "x$generate_doc" = "xyes"; then
++  AC_PATH_PROG([ASCIIDOC], [asciidoc], [])
++  AC_PATH_PROG([A2X], [a2x], [])
++  AC_PATH_PROG([XMLTO], [xmlto], [])
++fi
+ AM_CONDITIONAL([GEN_DOC], [\
+ 	test x"$ASCIIDOC" != x && \
+ 	test x"$A2X" != x && \

meta-ostro-xt/recipes-opencl/ocl-icd/ocl-icd_2.2.9.bb

@@ -1,12 +1,17 @@
 LICENSE = "BSD-2-Clause"
 LIC_FILES_CHKSUM = "file://COPYING;md5=232257bbf7320320725ca9529d3782ab"
 
-SRC_URI = "https://forge.imag.fr/frs/download.php/716/${BP}.tar.gz"
+SRC_URI = " \
+  https://forge.imag.fr/frs/download.php/716/${BP}.tar.gz \
+  file://configurable-doc-generation.patch \
+"
 SRC_URI[md5sum] = "7dab1a9531ea79c19a414a9ee229504e"
 SRC_URI[sha256sum] = "0c8ac13e2c5b737c34de49f9aca6cad3c4d33dd0bbb149b01238d76e798feae5"
 
 inherit autotools
 
+EXTRA_OECONF = "--disable-doc"
+
 DEPENDS += "ruby-native"
 
 BBCLASSEXTEND = "native"