From f588e6b649e198f97bd01cc5d1a2d0050005cd67 Mon Sep 17 00:00:00 2001
From: owentou <owentou@tencent.com>
Date: Tue, 26 Oct 2021 22:51:48 +0800
Subject: [PATCH] Using legacy `LIBPROTOBUF_EXPORT` with old version of
 protobuf Support old protobuf for OtlpHttp*Exporter

Signed-off-by: owentou <owentou@tencent.com>
---
 exporters/otlp/src/otlp_http_client.cc | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/exporters/otlp/src/otlp_http_client.cc b/exporters/otlp/src/otlp_http_client.cc
index cd6ae11867..df494dc9fa 100644
--- a/exporters/otlp/src/otlp_http_client.cc
+++ b/exporters/otlp/src/otlp_http_client.cc
@@ -11,7 +11,20 @@
 
 #include "google/protobuf/message.h"
 #include "google/protobuf/reflection.h"
-#include "google/protobuf/stubs/strutil.h"
+#include "google/protobuf/stubs/common.h"
+
+#if defined(GOOGLE_PROTOBUF_VERSION) && GOOGLE_PROTOBUF_VERSION >= 3007000
+#  include "google/protobuf/stubs/strutil.h"
+#else
+#  include "google/protobuf/stubs/port.h"
+namespace google
+{
+namespace protobuf
+{
+LIBPROTOBUF_EXPORT int Base64Escape(const unsigned char *src, int slen, char *dest, int szdest);
+}  // namespace protobuf
+}  // namespace google
+#endif
 
 #include "opentelemetry/exporters/otlp/protobuf_include_suffix.h"