--- /dev/null
+From 7fe1b8a53cc8c865c2a10dcd8f6cb4e51ccc6300 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Mon, 29 Jul 2019 12:19:10 +0200
+Subject: [PATCH] configure.ac: add an option to disable tests
+
+Add an option to allow the user to disable tests, this can be useful for
+example when the toolchain does not provide thread. Indeed, in this
+case, libgcrypt fails to build t-lock:
+
+t-lock.c: In function 'run_test':
+t-lock.c:359:3: error: unknown type name 'pthread_t'
+ pthread_t rthread;
+
+Fixes:
+ - http://autobuild.buildroot.org/results/50a8ba572e3fafd3c6a39bd54bcfcaf78b5ad325
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ Makefile.am | 7 ++++++-
+ configure.ac | 10 ++++++++++
+ 2 files changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 7fa4fa4d..f0bd90e4 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -39,9 +39,14 @@ else
+ doc =
+ endif
+
++if BUILD_TESTS
++tests = tests
++else
++tests =
++endif
+
+ DIST_SUBDIRS = m4 compat mpi cipher random src doc tests
+-SUBDIRS = compat mpi cipher random src $(doc) tests
++SUBDIRS = compat mpi cipher random src $(doc) $(tests)
+
+ EXTRA_DIST = autogen.sh autogen.rc README.GIT LICENSES \
+ ChangeLog-2011 build-aux/ChangeLog-2011 doc/ChangeLog-2011 \
+diff --git a/configure.ac b/configure.ac
+index e8c8cd39..1a6b61e5 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -2710,6 +2710,16 @@ AC_ARG_ENABLE([doc], AC_HELP_STRING([--disable-doc],
+ AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno])
+
+
++#
++# Option to disable building of tests
++#
++build_tests=yes
++AC_ARG_ENABLE([tests], AC_HELP_STRING([--disable-tests],
++ [do not build tests]),
++ build_tests=$enableval, build_tests=yes)
++AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno])
++
++
+ #
+ # Provide information about the build.
+ #
+--
+2.20.1
+