Add absl cuda warnings patch

cmake/external/abseil-cpp.cmake

@@ -21,7 +21,8 @@ else()
 endif()
 
 if(Patch_FOUND AND WIN32)
-  set(ABSL_PATCH_COMMAND ${Patch_EXECUTABLE} --binary --ignore-whitespace -p1 < ${PROJECT_SOURCE_DIR}/patches/abseil/absl_windows.patch)
+  set(ABSL_PATCH_COMMAND ${Patch_EXECUTABLE} --binary --ignore-whitespace -p1 < ${PROJECT_SOURCE_DIR}/patches/abseil/absl_windows.patch &&
+                         ${Patch_EXECUTABLE} --binary --ignore-whitespace -p1 < ${PROJECT_SOURCE_DIR}/patches/abseil/absl_cuda_warnings.patch)
 else()
   set(ABSL_PATCH_COMMAND "")
 endif()

cmake/patches/abseil/absl_cuda_warnings.patch

@@ -0,0 +1,40 @@
+diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h
+index 1234567..abcdefg 100644
+--- a/absl/hash/internal/hash.h
++++ b/absl/hash/internal/hash.h
+@@ -477,7 +477,7 @@ H AbslHashValue(H hash_state, T (&)[N]) {
+ template <typename H, typename T, size_t N>
+ H AbslHashValue(H hash_state, T (&)[N]) {
+   static_assert(
+-      sizeof(T) == -1,
++      sizeof(T) == size_t(-1),
+       "Hashing C arrays is not allowed. For string literals, wrap the literal "
+       "in absl::string_view(). To hash the array contents, use "
+       "absl::MakeSpan() or make the array an std::array. To hash the array "
+diff --git a/absl/hash/hash.h b/absl/hash/hash.h
+index 1234567..abcdefg 100644
+--- a/absl/hash/hash.h
++++ b/absl/hash/hash.h
+@@ -333,7 +333,8 @@ class HashState : public hash_internal::HashStateBase<HashState> {
+       absl::enable_if_t<
+           std::is_base_of<hash_internal::HashStateBase<T>, T>::value, int> = 0>
+   static HashState Create(T* state) {
+-    HashState s;
++    HashState s = {};
++    (void)s;
+     s.Init(state);
+     return s;
+   }
+diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
+index 1234567..abcdefg 100644
+--- a/absl/container/internal/raw_hash_set.h
++++ b/absl/container/internal/raw_hash_set.h
+@@ -464,7 +464,7 @@ inline uint16_t NextSeed() {
+ inline uint16_t NextSeed() {
+   static_assert(PerTableSeed::kBitCount == 16);
+   thread_local uint16_t seed =
+-      static_cast<uint16_t>(reinterpret_cast<uintptr_t>(&seed));
++      static_cast<uint16_t>(reinterpret_cast<uintptr_t>(&seed) & 0xFFFFu);
+   seed += uint16_t{0xad53};
+   return seed;
+ }

cmake/vcpkg-ports/abseil/absl_cuda_warnings.patch

@@ -0,0 +1,40 @@
+diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h
+index 1234567..abcdefg 100644
+--- a/absl/hash/internal/hash.h
++++ b/absl/hash/internal/hash.h
+@@ -477,7 +477,7 @@ H AbslHashValue(H hash_state, T (&)[N]) {
+ template <typename H, typename T, size_t N>
+ H AbslHashValue(H hash_state, T (&)[N]) {
+   static_assert(
+-      sizeof(T) == -1,
++      sizeof(T) == size_t(-1),
+       "Hashing C arrays is not allowed. For string literals, wrap the literal "
+       "in absl::string_view(). To hash the array contents, use "
+       "absl::MakeSpan() or make the array an std::array. To hash the array "
+diff --git a/absl/hash/hash.h b/absl/hash/hash.h
+index 1234567..abcdefg 100644
+--- a/absl/hash/hash.h
++++ b/absl/hash/hash.h
+@@ -333,7 +333,8 @@ class HashState : public hash_internal::HashStateBase<HashState> {
+       absl::enable_if_t<
+           std::is_base_of<hash_internal::HashStateBase<T>, T>::value, int> = 0>
+   static HashState Create(T* state) {
+-    HashState s;
++    HashState s = {};
++    (void)s;
+     s.Init(state);
+     return s;
+   }
+diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
+index 1234567..abcdefg 100644
+--- a/absl/container/internal/raw_hash_set.h
++++ b/absl/container/internal/raw_hash_set.h
+@@ -464,7 +464,7 @@ inline uint16_t NextSeed() {
+ inline uint16_t NextSeed() {
+   static_assert(PerTableSeed::kBitCount == 16);
+   thread_local uint16_t seed =
+-      static_cast<uint16_t>(reinterpret_cast<uintptr_t>(&seed));
++      static_cast<uint16_t>(reinterpret_cast<uintptr_t>(&seed) & 0xFFFFu);
+   seed += uint16_t{0xad53};
+   return seed;
+ }

cmake/vcpkg-ports/abseil/portfile.cmake

@@ -9,6 +9,7 @@ vcpkg_from_github(
     SHA512 4ee1a217203933382e728d354a149253a517150eee7580a0abecc69584b2eb200d91933ef424487e3a3fe0e8ab5e77b0288485cac982171b3585314a4417e7d4
     HEAD_REF master
     PATCHES absl_windows.patch
+            absl_cuda_warnings.patch
 )