Fix freebsd build.

It turns out system headers included by generated plugin.pb.h file already contains
major/minor macro definitions when built on FreeBSD and we need to add #undefs to
the generated header file.

This change also fixes another compile error regarding EXPECT_DEATH on FreeBSD.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/google/protobuf/compiler/cpp/cpp_file.h b/src/google/protobuf/compiler/cpp/cpp_file.h
index 25d6eabf..e3fbb96d 100644
--- a/src/google/protobuf/compiler/cpp/cpp_file.h
+++ b/src/google/protobuf/compiler/cpp/cpp_file.h
@@ -133,6 +133,15 @@ class FileGenerator {
 
   void GenerateProto2NamespaceEnumSpecializations(io::Printer* printer);
 
+  // Sometimes the names we use in a .proto file happen to be defined as macros
+  // on some platforms (e.g., macro/minor used in plugin.proto are defined as
+  // macros in sys/types.h on FreeBSD and a few other platforms). To make the
+  // generated code compile on these platforms, we either have to undef the
+  // macro for these few platforms, or rename the field name for all platforms.
+  // Since these names are part of protobuf public API, renaming is generally
+  // a breaking change so we prefer the #undef approach.
+  void GenerateMacroUndefs(io::Printer* printer);
+
   const FileDescriptor* file_;
   const Options options_;