diff --git a/cmake/install.cmake b/cmake/install.cmake
index 9d837ac536c9..e7eb2103be6e 100644
--- a/cmake/install.cmake
+++ b/cmake/install.cmake
@@ -8,10 +8,14 @@ list(APPEND _pc_targets "utf8_range")
 
 set(_protobuf_PC_REQUIRES "")
 set(_sep "")
-foreach (_target IN LISTS _pc_target_list)
+foreach (_target IN LISTS _pc_targets)
   string(CONCAT _protobuf_PC_REQUIRES "${_protobuf_PC_REQUIRES}" "${_sep}" "${_target}")
   set(_sep " ")
 endforeach ()
+set(_protobuf_PC_CFLAGS)
+if (protobuf_BUILD_SHARED_LIBS)
+  set(_protobuf_PC_CFLAGS -DPROTOBUF_USE_DLLS)
+endif ()
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/protobuf.pc.cmake
                ${CMAKE_CURRENT_BINARY_DIR}/protobuf.pc @ONLY)
diff --git a/cmake/protobuf-lite.pc.cmake b/cmake/protobuf-lite.pc.cmake
index 7f88046998ea..47d911b303fa 100644
--- a/cmake/protobuf-lite.pc.cmake
+++ b/cmake/protobuf-lite.pc.cmake
@@ -9,5 +9,5 @@ Version: @protobuf_VERSION@
 Requires: @_protobuf_PC_REQUIRES@
 Requires.private: @_protobuf_PC_REQUIRES_PRIVATE@
 Libs: -L${libdir} -lprotobuf-lite @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir}
+Cflags: -I${includedir} @_protobuf_PC_CFLAGS@
 Conflicts: protobuf
diff --git a/cmake/protobuf.pc.cmake b/cmake/protobuf.pc.cmake
index b3cda920757c..8f6b78c28c64 100644
--- a/cmake/protobuf.pc.cmake
+++ b/cmake/protobuf.pc.cmake
@@ -9,5 +9,5 @@ Version: @protobuf_VERSION@
 Requires: @_protobuf_PC_REQUIRES@
 Requires.private: @_protobuf_PC_REQUIRES_PRIVATE@
 Libs: -L${libdir} -lprotobuf @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir}
+Cflags: -I${includedir} @_protobuf_PC_CFLAGS@
 Conflicts: protobuf-lite
diff --git a/src/google/protobuf/arena_align.h b/src/google/protobuf/arena_align.h
index 958bb9d072b8..d63393c84311 100644
--- a/src/google/protobuf/arena_align.h
+++ b/src/google/protobuf/arena_align.h
@@ -99,7 +99,7 @@ struct ArenaAlignDefault {
   }
 
   static inline PROTOBUF_ALWAYS_INLINE constexpr size_t Ceil(size_t n) {
-    return (n + align - 1) & -align;
+    return (n + align - 1) & ~(align - 1);
   }
   static inline PROTOBUF_ALWAYS_INLINE constexpr size_t Floor(size_t n) {
     return (n & ~(align - 1));
@@ -113,7 +113,7 @@ struct ArenaAlignDefault {
   template <typename T>
   static inline PROTOBUF_ALWAYS_INLINE T* Ceil(T* ptr) {
     uintptr_t intptr = reinterpret_cast<uintptr_t>(ptr);
-    return reinterpret_cast<T*>((intptr + align - 1) & -align);
+    return reinterpret_cast<T*>((intptr + align - 1) & ~(align - 1));
   }
 
   template <typename T>
@@ -142,7 +142,9 @@ struct ArenaAlign {
     return (reinterpret_cast<uintptr_t>(ptr) & (align - 1)) == 0U;
   }
 
-  constexpr size_t Ceil(size_t n) const { return (n + align - 1) & -align; }
+  constexpr size_t Ceil(size_t n) const {
+    return (n + align - 1) & ~(align - 1);
+  }
   constexpr size_t Floor(size_t n) const { return (n & ~(align - 1)); }
 
   constexpr size_t Padded(size_t n) const {
@@ -156,7 +158,7 @@ struct ArenaAlign {
   template <typename T>
   T* Ceil(T* ptr) const {
     uintptr_t intptr = reinterpret_cast<uintptr_t>(ptr);
-    return reinterpret_cast<T*>((intptr + align - 1) & -align);
+    return reinterpret_cast<T*>((intptr + align - 1) & ~(align - 1));
   }
 
   template <typename T>
diff --git a/src/google/protobuf/repeated_field.h b/src/google/protobuf/repeated_field.h
index bfcb93833d08..057565a41652 100644
--- a/src/google/protobuf/repeated_field.h
+++ b/src/google/protobuf/repeated_field.h
@@ -494,7 +494,7 @@ template <typename Element>
 inline RepeatedField<Element>::RepeatedField(const RepeatedField& rhs)
     : current_size_(0), total_size_(0), arena_or_elements_(nullptr) {
   StaticValidityCheck();
-  if (size_t size = rhs.current_size_) {
+  if (auto size = rhs.current_size_) {
     Grow(0, size);
     ExchangeCurrentSize(size);
     UninitializedCopyN(rhs.elements(), size, unsafe_elements());
@@ -775,7 +775,7 @@ inline void RepeatedField<Element>::Clear() {
 template <typename Element>
 inline void RepeatedField<Element>::MergeFrom(const RepeatedField& rhs) {
   ABSL_DCHECK_NE(&rhs, this);
-  if (size_t size = rhs.current_size_) {
+  if (auto size = rhs.current_size_) {
     Reserve(current_size_ + size);
     Element* dst = elements() + ExchangeCurrentSize(current_size_ + size);
     UninitializedCopyN(rhs.elements(), size, dst);