1 files changed, 33 insertions, 0 deletions
diff --git a/dev-libs/protobuf-c/files/protobuf-c-1.3.0-restore-protobuf-2-compatibility.patch b/dev-libs/protobuf-c/files/protobuf-c-1.3.0-restore-protobuf-2-compatibility.patch
new file mode 100644
index 000000000000..962341b6540d
--- /dev/null
+++ b/dev-libs/protobuf-c/files/protobuf-c-1.3.0-restore-protobuf-2-compatibility.patch
@@ -0,0 +1,33 @@
+From 4302266b45303094616685c7997a6e6015ddadba Mon Sep 17 00:00:00 2001
+From: Robert Edmonds <edmonds@users.noreply.github.com>
+Date: Mon, 7 Aug 2017 12:31:55 -0400
+Subject: [PATCH] Restore protobuf-2.x compatibility
+
+The change in commit 712154b912de824741381c0bb26c2fbed54515a3 ("Bump
+minimum required header version for proto3 syntax") uses functionality
+only exposed by protobuf-3.x, breaking the build when compiling against
+protobuf-2.x.
+
+Since we still want to support building against protobuf-2.x, this
+commit makes the proto3 syntax check in the file generator dependent on
+building against protobuf-3.x.
+---
+ protoc-c/c_file.cc | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/protoc-c/c_file.cc b/protoc-c/c_file.cc
+index 9851768..0f1d770 100644
+--- a/protoc-c/c_file.cc
++++ b/protoc-c/c_file.cc
+@@ -120,9 +120,11 @@ void FileGenerator::GenerateHeader(io::Printer* printer) {
+   string filename_identifier = FilenameIdentifier(file_->name());
+ 
+   int min_header_version = 1000000;
++#if defined(HAVE_PROTO3)
+   if (file_->syntax() == FileDescriptor::SYNTAX_PROTO3) {
+     min_header_version = 1003000;
+   }
++#endif
+ 
+   // Generate top of header.
+   printer->Print(