From 7b5814e1752da355780bbbcc9b4bb80b8bc2b23b Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 31 Jan 2020 18:26:23 +0000
Subject: [PATCH] Work around two -Werror warning issues in googletest, which
 have been solved upstream in the mean time.

The first issue is because one of googletest's generated headers contain
classes with a user-declared copy assignment operator, but rely on the
generation by the compiler of an implicit copy constructor, which is now
deprecated:

/usr/obj/usr/src/amd64.amd64/tmp/usr/include/private/gtest/internal/gtest-param-util-generated.h:5284:8: error: definition of implicit copy constructor for 'CartesianProductHolder3<testing::internal::ParamGenerator<bool>, testing::internal::ValueArray3<int, int, int>, testing::internal::ValueArray4<cache_mode, cache_mode, cache_mode, cache_mode> >' is deprecated because it has a user-declared copy assignment operator [-Werror,-Wdeprecated-copy]
  void operator=(const CartesianProductHolder3& other);
       ^
/usr/obj/usr/src/amd64.amd64/tmp/usr/include/private/gtest/gtest-param-test.h:1277:10: note: in implicit copy constructor for 'testing::internal::CartesianProductHolder3<testing::internal::ParamGenerator<bool>, testing::internal::ValueArray3<int, int, int>, testing::internal::ValueArray4<cache_mode, cache_mode, cache_mode, cache_mode> >' first required here
  return internal::CartesianProductHolder3<Generator1, Generator2, Generator3>(
         ^
/usr/src/tests/sys/fs/fusefs/io.cc:534:2: note: in instantiation of function template specialization 'testing::Combine<testing::internal::ParamGenerator<bool>, testing::internal::ValueArray3<int, int, int>, testing::internal::ValueArray4<cache_mode, cache_mode, cache_mode, cache_mode> >' requested here
        Combine(Bool(),                                 /* async read */
        ^

For now, silence the warning using -Wno-deprecated-copy.

The second issue is because one of the googlemock test programs attempts
to use "unsigned wchar_t" and "signed wchar_t", which are non-standard
and at best, hazily defined:

contrib/googletest/googlemock/test/gmock-actions_test.cc:111:37: error: 'wchar_t' cannot be signed or unsigned [-Wsigned-unsigned-wchar]
  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned wchar_t>::Get());
                                    ^
contrib/googletest/googlemock/test/gmock-actions_test.cc:112:36: error: 'wchar_t' cannot be signed or unsigned [-Wsigned-unsigned-wchar]
  EXPECT_EQ(0, BuiltInDefaultValue<signed wchar_t>::Get());
                                   ^

For now, silence the warning using -Wno-signed-unsigned-wchar.

MFC after:	3 days
---
 share/mk/googletest.test.inc.mk | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/share/mk/googletest.test.inc.mk b/share/mk/googletest.test.inc.mk
index ee08a9a70dcc..1f35e11894d3 100644
--- a/share/mk/googletest.test.inc.mk
+++ b/share/mk/googletest.test.inc.mk
@@ -5,6 +5,18 @@ GTESTS_CXXFLAGS+= -DGTEST_HAS_PTHREAD=1
 GTESTS_CXXFLAGS+= -DGTEST_HAS_STREAM_REDIRECTION=1
 GTESTS_CXXFLAGS+= -frtti
 
+.include <bsd.compiler.mk>
+
+.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000
+# Required until googletest is upgraded to a more recent version (after
+# upstream commit efecb0bfa687cf87836494f5d62868485c00fb66).
+GTESTS_CXXFLAGS+= -Wno-deprecated-copy
+
+# Required until googletest is upgraded to a more recent version (after
+# upstream commit d44b137fd104dfffdcdea103f7de11b9eccc45c2).
+GTESTS_CXXFLAGS+= -Wno-signed-unsigned-wchar
+.endif
+
 # XXX: src.libnames.mk should handle adding this directory for libgtest's,
 # libgmock's, etc, headers.
 CXXFLAGS+=	-I${DESTDIR}${INCLUDEDIR}/private