package/libgpgme: fix build without threads

Fix the following build failure without threads raised since bump to
version 1.17.1 in commit 3f121357ae225be9ac2fbf4505027c2cc690626b and
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=commit;h=f3177d3ee0a1d30e15f33ff226b5e4c96b7610db:

run-wkdlookup.cpp: In function 'int main(int, char**)':
run-wkdlookup.cpp:130:18: error: 'std::this_thread' has not been declared
  130 |             std::this_thread::sleep_for(std::chrono::milliseconds{250 * cnt});
      |                  ^~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/2915f6105bae595274fabaa12de7cc53926d22d0

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libgpgme/0001-Fix-build-without-threads.patch

@@ -0,0 +1,59 @@
+From fc1b821c80c78f4ae635639c7fce5bad754edda7 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sat, 27 Aug 2022 23:24:44 +0200
+Subject: [PATCH] Fix build without threads
+
+Allow the user to disable cpp tests to avoid the following build failure
+without threads raised since version 1.17.1 and
+https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=commit;h=f3177d3ee0a1d30e15f33ff226b5e4c96b7610db
+
+run-wkdlookup.cpp: In function 'int main(int, char**)':
+run-wkdlookup.cpp:130:18: error: 'std::this_thread' has not been declared
+  130 |             std::this_thread::sleep_for(std::chrono::milliseconds{250 * cnt});
+      |                  ^~~~~~~~~~~
+
+Fixes:
+ - http://autobuild.buildroot.org/results/2915f6105bae595274fabaa12de7cc53926d22d0
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://dev.gnupg.org/T6165]
+---
+ configure.ac         | 5 +++++
+ lang/cpp/Makefile.am | 6 +++++-
+ 2 files changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index e7fe04a7..d1c87486 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -553,6 +553,11 @@ AC_ARG_ENABLE(g13-test,
+          run_g13_test=$enableval)
+ AM_CONDITIONAL(RUN_G13_TESTS, test "$run_g13_test" = "yes")
+ 
++run_cpp_test="yes"
++AC_ARG_ENABLE(cpp-test,
++  AS_HELP_STRING([--disable-cpp-test],[disable CPP regression test]),
++         run_cpp_test=$enableval)
++AM_CONDITIONAL(RUN_CPP_TESTS, test "$run_cpp_test" = "yes")
+ 
+ # Checks for header files.
+ AC_CHECK_HEADERS_ONCE([locale.h sys/select.h sys/uio.h argp.h stdint.h
+diff --git a/lang/cpp/Makefile.am b/lang/cpp/Makefile.am
+index 724da6ca..243c463d 100644
+--- a/lang/cpp/Makefile.am
++++ b/lang/cpp/Makefile.am
+@@ -18,6 +18,10 @@
+ # License along with this program; if not, see <https://gnu.org/licenses/>.
+ # SPDX-License-Identifier: LGPL-2.1-or-later
+ 
+-SUBDIRS = src tests
++SUBDIRS = src
++
++if RUN_CPP_TESTS
++SUBDIRS += tests
++endif
+ 
+ EXTRA_DIST = README
+-- 
+2.35.1
+

package/libgpgme/libgpgme.mk

@@ -14,6 +14,8 @@ LIBGPGME_CPE_ID_PRODUCT = gpgme
 LIBGPGME_INSTALL_STAGING = YES
 LIBGPGME_DEPENDENCIES = libassuan libgpg-error
 LIBGPGME_CONFIG_SCRIPTS = gpgme-config
+# We're patching configure.ac
+LIBGPGME_AUTORECONF = YES
 
 LIBGPGME_LANGUAGE_BINDINGS = cl
 # C++ bindings require a C++11 capable gcc, and -Wsuggest-override support
@@ -28,6 +30,7 @@ LIBGPGME_CONF_OPTS = \
 	--disable-gpgconf-test \
 	--disable-g13-test \
 	--disable-gpg-test \
+	--disable-cpp-test \
 	--enable-languages=$(subst $(space),$(comma),$(LIBGPGME_LANGUAGE_BINDINGS))
 
 # Handle argp-standalone or it errors out during build