[libc++] Mark a few more tests as unsupported on gcc-8/9.

This will fix remaining failures on gcc-9 buildbot: http://lab.llvm.org:8011/#/builders/101.
gcc-8 and gcc-9 do not support constexpr destructors nor constexpr allocation.

Fix gcc warnings: -Wconversion, -Wpragmas.

10 files changed, 16 insertions, 1 deletions

diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate.pass.cpp
index ab354f42a1d8..e42277828750 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: gcc-8, gcc-9
+
 // <memory>
 
 // template <class Alloc>
diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate_hint.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate_hint.pass.cpp
index 5cdb5e070bed..0960285ed543 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate_hint.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/allocate_hint.pass.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: clang-8
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/construct.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/construct.pass.cpp
index a3465ff22d66..6015a6150b4b 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/construct.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/construct.pass.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: clang-8
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/deallocate.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/deallocate.pass.cpp
index 2f153eedc6fc..a23345942db7 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/deallocate.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/deallocate.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: gcc-8, gcc-9
+
 // <memory>
 
 // template <class Alloc>
diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
index 6d7b0bd5c44c..e85813b3ebf2 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: clang-8
+// constexpr destructors are only supported starting with gcc 10
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/default.allocator/allocator.members/allocate.pass.cpp b/libcxx/test/std/utilities/memory/default.allocator/allocator.members/allocate.pass.cpp
index a528bf20273a..2f6bd0a83068 100644
--- a/libcxx/test/std/utilities/memory/default.allocator/allocator.members/allocate.pass.cpp
+++ b/libcxx/test/std/utilities/memory/default.allocator/allocator.members/allocate.pass.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: clang-8
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy.pass.cpp b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy.pass.cpp
index bac1da6b2b0d..d9998c7d0429 100644
--- a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy.pass.cpp
+++ b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy.pass.cpp
@@ -9,6 +9,8 @@
 // UNSUPPORTED: c++03, c++11, c++14
 // constexpr destructors are only supported starting with clang 10
 // UNSUPPORTED: clang-5, clang-6, clang-7, clang-8, clang-9
+// constexpr destructors are only supported starting with gcc 10
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp
index e15bf757f04c..50c43a10dfbc 100644
--- a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp
+++ b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp
@@ -9,6 +9,8 @@
 // UNSUPPORTED: c++03, c++11, c++14
 // constexpr destructors are only supported starting with clang 10
 // UNSUPPORTED: clang-5, clang-6, clang-7, clang-8, clang-9
+// constexpr destructors are only supported starting with gcc 10
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_n.pass.cpp b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_n.pass.cpp
index 33dd1910bf8e..54b1633d096f 100644
--- a/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_n.pass.cpp
+++ b/libcxx/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_n.pass.cpp
@@ -9,6 +9,8 @@
 // UNSUPPORTED: c++03, c++11, c++14
 // constexpr destructors are only supported starting with clang 10
 // UNSUPPORTED: clang-5, clang-6, clang-7, clang-8, clang-9
+// constexpr destructors are only supported starting with gcc 10
+// UNSUPPORTED: gcc-8, gcc-9
 
 // <memory>
 
diff --git a/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp b/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
index c9123fe18881..844e11eef7bb 100644
--- a/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
@@ -19,7 +19,7 @@
 
 // Ignore warnings about volatile in parameters being deprecated.
 // We know it is, but we still have to test it.
-#if defined(__GNUC__) && !defined(__clang__)
+#if defined(__GNUC__) && (__GNUC__ >= 10) && !defined(__clang__)
 #   pragma GCC diagnostic ignored "-Wvolatile"
 #endif