ctest doesn't compile on mac (mohave)

stevewatanabe @ ~/libcouchbase/tests/iotests (master) $ gcc --version

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1

Apple clang version 11.0.0 (clang-1100.0.33.8)

Target: x86_64-apple-darwin18.7.0

Thread model: posix

InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

stevewatanabe @ ~/libcouchbase/tests/iotests (master) $ git diff

diff --git a/tests/iotests/t_netfail.cc b/tests/iotests/t_netfail.cc

index c45c61cd..88a18aa7 100644

--- a/tests/iotests/t_netfail.cc

+++ b/tests/iotests/t_netfail.cc

@@ -815,7 +815,9 @@ TEST_F(MockUnitTest, testNegativeIndex)

     lcb_cmdstore_key(scmd, key.c_str(), key.size());

     std::string value("{}");

     lcb_cmdstore_value(scmd, value.c_str(), value.size());

-    ni = {LCB_SUCCESS, 0};

+    // ni = {LCB_SUCCESS, 0};

+    ni.err = LCB_SUCCESS;

+    ni.callCount = 0;

     err = lcb_store(instance, &ni, scmd);

     ASSERT_EQ(LCB_SUCCESS, err);

     lcb_wait(instance, LCB_WAIT_DEFAULT);

@@ -826,7 +828,9 @@ TEST_F(MockUnitTest, testNegativeIndex)

     lcb_CMDGET *gcmd;

     lcb_cmdget_create(&gcmd);

     lcb_cmdget_key(gcmd, key.c_str(), key.size());

-    ni = {LCB_SUCCESS, 0};

+    // ni = {LCB_SUCCESS, 0};

+    ni.err = LCB_SUCCESS;

+    ni.callCount = 0;

     // Set the index to -1

     vbc->vbuckets[vb].servers[0] = -1;

     err = lcb_get(instance, &ni, gcmd);

diff --git a/tests/iotests/t_obseqno.cc b/tests/iotests/t_obseqno.cc

index d4fb60a5..e7a8e590 100644

--- a/tests/iotests/t_obseqno.cc

+++ b/tests/iotests/t_obseqno.cc

@@ -129,7 +129,8 @@ TEST_F(ObseqnoTest, testObserve)

     for (size_t ii = 0; ii < lcbvb_get_nreplicas(vbc) + 1; ii++) {

         int ix = lcbvb_vbserver(vbc, st_fetched.vbid_, ii);

-        lcb_RESPOBSEQNO resp{};

+        // lcb_RESPOBSEQNO resp{};

+        lcb_RESPOBSEQNO resp;