Make maps fields work on installed C++ protobufs.

Change-Id: Id937e25bbb35968ee76c92bd4a8ce6247408c443

2 files changed, 44 insertions, 25 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 0f0bd089..5179846c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -31,12 +31,24 @@ nobase_dist_proto_DATA = google/protobuf/descriptor.proto \
 clean-local:
 	rm -f *.loT
 
-CLEANFILES = $(protoc_outputs) unittest_proto_middleman \
+public_config = google/protobuf/stubs/pbconfig.h
+
+CLEANFILES = $(protoc_outputs) $(public_config) unittest_proto_middleman \
              testzip.jar testzip.list testzip.proto testzip.zip
 
 MAINTAINERCLEANFILES =   \
   Makefile.in
 
+# Generate and distribute a minimum config.h file to make hash_map work.
+# The autoheader config has too much info, which might conflict with other
+# macros applications might include. Thus, we create a stubs/pbconfig.h, that
+# only #defines what we really need, and prefix it with GOOGLE_PROTOBUF_ to
+# avoid conflicts.
+$(public_config): $(top_builddir)/config.h $(top_srcdir)/config.h.include
+	echo "// Note: Google Protobuf internal only. Do NOT include." > $@
+	cat $(top_builddir)/config.h | grep -f $(top_srcdir)/config.h.include | \
+	sed 's,#define , #define GOOGLE_PROTOBUF_,' >> $@
+
 nobase_include_HEADERS =                                        \
   google/protobuf/stubs/atomic_sequence_num.h                   \
   google/protobuf/stubs/atomicops.h                             \
@@ -54,11 +66,12 @@ nobase_include_HEADERS =                                        \
   google/protobuf/stubs/atomicops_internals_x86_gcc.h           \
   google/protobuf/stubs/atomicops_internals_x86_msvc.h          \
   google/protobuf/stubs/casts.h                                 \
-  google/protobuf/stubs/singleton.h                             \
   google/protobuf/stubs/common.h                                \
   google/protobuf/stubs/fastmem.h                               \
+  google/protobuf/stubs/hash.h                                  \
   google/protobuf/stubs/once.h                                  \
   google/protobuf/stubs/platform_macros.h                       \
+  google/protobuf/stubs/singleton.h                             \
   google/protobuf/stubs/stl_util.h                              \
   google/protobuf/stubs/template_util.h                         \
   google/protobuf/stubs/type_traits.h                           \
@@ -111,6 +124,9 @@ nobase_include_HEADERS =                                        \
   google/protobuf/compiler/python/python_generator.h            \
   google/protobuf/compiler/ruby/ruby_generator.h
 
+nobase_nodist_include_HEADERS =                                 \
+	$(public_config)
+
 lib_LTLIBRARIES = libprotobuf-lite.la libprotobuf.la libprotoc.la
 
 libprotobuf_lite_la_LIBADD = $(PTHREAD_LIBS)
@@ -135,7 +151,8 @@ libprotobuf_lite_la_SOURCES =                                  \
   google/protobuf/io/coded_stream.cc                           \
   google/protobuf/io/coded_stream_inl.h                        \
   google/protobuf/io/zero_copy_stream.cc                       \
-  google/protobuf/io/zero_copy_stream_impl_lite.cc
+  google/protobuf/io/zero_copy_stream_impl_lite.cc             \
+	$(public_config)
 
 libprotobuf_la_LIBADD = $(PTHREAD_LIBS)
 libprotobuf_la_LDFLAGS = -version-info 10:0:0 -export-dynamic -no-undefined
@@ -374,7 +391,7 @@ protoc_outputs =                                               \
   google/protobuf/compiler/cpp/cpp_test_bad_identifiers.pb.cc  \
   google/protobuf/compiler/cpp/cpp_test_bad_identifiers.pb.h
 
-BUILT_SOURCES = $(protoc_outputs)
+BUILT_SOURCES = $(protoc_outputs) $(public_config)
 
 if USE_EXTERNAL_PROTOC
 
diff --git a/src/google/protobuf/stubs/hash.h b/src/google/protobuf/stubs/hash.h
index 5b6a073d..badcb6a5 100644
--- a/src/google/protobuf/stubs/hash.h
+++ b/src/google/protobuf/stubs/hash.h
@@ -37,13 +37,14 @@
 
 #include <string.h>
 #include <google/protobuf/stubs/common.h>
-#include "config.h"
+#include <google/protobuf/stubs/pbconfig.h>
 
-#if defined(HAVE_HASH_MAP) && defined(HAVE_HASH_SET)
-#include HASH_MAP_H
-#include HASH_SET_H
+#if defined(GOOGLE_PROTOBUF_HAVE_HASH_MAP) && \
+    defined(GOOGLE_PROTOBUF_HAVE_HASH_SET)
+#include GOOGLE_PROTOBUF_HASH_MAP_H
+#include GOOGLE_PROTOBUF_HASH_SET_H
 #else
-#define MISSING_HASH
+#define GOOGLE_PROTOBUF_MISSING_HASH
 #include <map>
 #include <set>
 #endif
@@ -51,7 +52,7 @@
 namespace google {
 namespace protobuf {
 
-#ifdef MISSING_HASH
+#ifdef GOOGLE_PROTOBUF_MISSING_HASH
 
 // This system doesn't have hash_map or hash_set.  Emulate them using map and
 // set.
@@ -105,7 +106,7 @@ class hash_set : public std::set<Key, HashFcn> {
 #elif defined(_MSC_VER) && !defined(_STLPORT_VERSION)
 
 template <typename Key>
-struct hash : public HASH_NAMESPACE::hash_compare<Key> {
+struct hash : public GOOGLE_PROTOBUF_HASH_NAMESPACE::hash_compare<Key> {
 };
 
 // MSVC's hash_compare<const char*> hashes based on the string contents but
@@ -119,13 +120,13 @@ class CstringLess {
 
 template <>
 struct hash<const char*>
-  : public HASH_NAMESPACE::hash_compare<const char*, CstringLess> {
-};
+    : public GOOGLE_PROTOBUF_HASH_NAMESPACE::hash_compare<
+        const char*, CstringLess> {};
 
 template <typename Key, typename Data,
           typename HashFcn = hash<Key>,
           typename EqualKey = int >
-class hash_map : public HASH_NAMESPACE::hash_map<
+class hash_map : public GOOGLE_PROTOBUF_HASH_NAMESPACE::hash_map<
     Key, Data, HashFcn> {
  public:
   hash_map(int = 0) {}
@@ -134,7 +135,7 @@ class hash_map : public HASH_NAMESPACE::hash_map<
 template <typename Key,
           typename HashFcn = hash<Key>,
           typename EqualKey = int >
-class hash_set : public HASH_NAMESPACE::hash_set<
+class hash_set : public GOOGLE_PROTOBUF_HASH_NAMESPACE::hash_set<
     Key, HashFcn> {
  public:
   hash_set(int = 0) {}
@@ -143,7 +144,7 @@ class hash_set : public HASH_NAMESPACE::hash_set<
 #else
 
 template <typename Key>
-struct hash : public HASH_NAMESPACE::hash<Key> {
+struct hash : public GOOGLE_PROTOBUF_HASH_NAMESPACE::hash<Key> {
 };
 
 template <typename Key>
@@ -166,25 +167,26 @@ struct hash<const char*> {
   }
 };
 
-template <typename Key, typename Data,
-          typename HashFcn = hash<Key>,
+template <typename Key, typename Data, typename HashFcn = hash<Key>,
           typename EqualKey = std::equal_to<Key> >
-class hash_map : public HASH_NAMESPACE::HASH_MAP_CLASS<
-    Key, Data, HashFcn, EqualKey> {
+class hash_map
+    : public GOOGLE_PROTOBUF_HASH_NAMESPACE::GOOGLE_PROTOBUF_HASH_MAP_CLASS<
+          Key, Data, HashFcn, EqualKey> {
  public:
   hash_map(int = 0) {}
 };
 
-template <typename Key,
-          typename HashFcn = hash<Key>,
+template <typename Key, typename HashFcn = hash<Key>,
           typename EqualKey = std::equal_to<Key> >
-class hash_set : public HASH_NAMESPACE::HASH_SET_CLASS<
-    Key, HashFcn, EqualKey> {
+class hash_set
+    : public GOOGLE_PROTOBUF_HASH_NAMESPACE::GOOGLE_PROTOBUF_HASH_SET_CLASS<
+          Key, HashFcn, EqualKey> {
  public:
   hash_set(int = 0) {}
 };
 
-#endif
+#undef GOOGLE_PROTOBUF_MISSING_HASH
+#endif  // !GOOGLE_PROTOBUF_MISSING_HASH
 
 template <>
 struct hash<string> {