From ba7431b4fd6c62dd04d252e769e825769accb2a9 Mon Sep 17 00:00:00 2001
From: attilamolnar <attilamolnar@hush.com>
Date: Fri, 23 Aug 2013 11:13:09 +0200
Subject: [PATCH] Hide all symbols that aren't exported explicitly

In addition to reducing the sizes of all binaries this also helps the optimizer
---
 include/compat.h      | 4 ++--
 include/hashcomp.h    | 4 ++--
 include/modules.h     | 2 +-
 include/protocol.h    | 2 +-
 make/template/main.mk | 6 +++++-
 5 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/include/compat.h b/include/compat.h
index 1cdad06c2..0357f5478 100644
--- a/include/compat.h
+++ b/include/compat.h
@@ -111,6 +111,6 @@
 #else
 # include <unistd.h>
 # define ENTRYPOINT int main(int argc, char** argv)
-# define DllExport
-# define CoreExport
+# define DllExport __attribute__ ((visibility ("default")))
+# define CoreExport __attribute__ ((visibility ("default")))
 #endif
diff --git a/include/hashcomp.h b/include/hashcomp.h
index 51570978a..ec1cc5764 100644
--- a/include/hashcomp.h
+++ b/include/hashcomp.h
@@ -118,8 +118,8 @@ namespace irc
 	 * This class is used to implement irc::string, a case-insensitive, RFC-
 	 * comparing string class.
 	 */
-	struct irc_char_traits : std::char_traits<char> {
-
+	struct CoreExport irc_char_traits : public std::char_traits<char>
+	{
 		/** Check if two chars match.
 		 * @param c1st First character
 		 * @param c2nd Second character
diff --git a/include/modules.h b/include/modules.h
index e8f0d10fe..d7b46ad48 100644
--- a/include/modules.h
+++ b/include/modules.h
@@ -1428,7 +1428,7 @@ struct AllModuleList {
 	{ \
 		return new y; \
 	} \
-	extern "C" const char inspircd_src_version[] = VERSION " " REVISION;
+	extern "C" DllExport const char inspircd_src_version[] = VERSION " " REVISION;
 #endif
 
 #define COMMAND_INIT(c) MODULE_INIT(CommandModule<c>)
diff --git a/include/protocol.h b/include/protocol.h
index 6af0ed21c..e474dd095 100644
--- a/include/protocol.h
+++ b/include/protocol.h
@@ -26,7 +26,7 @@ class User;
 
 typedef std::vector<std::string> parameterlist;
 
-class ProtocolInterface
+class CoreExport ProtocolInterface
 {
  public:
 	class ServerInfo
diff --git a/make/template/main.mk b/make/template/main.mk
index bdb4d9762..d82e8b27e 100644
--- a/make/template/main.mk
+++ b/make/template/main.mk
@@ -35,7 +35,7 @@ COMPILER = @COMPILER@
 SYSTEM = @SYSTEM@
 BUILDPATH = @BUILD_DIR@
 SOCKETENGINE = @SOCKETENGINE@
-CORECXXFLAGS = -fPIC -pipe -Iinclude -Wall -Wextra -Wfatal-errors -Wno-unused-parameter -Wshadow
+CORECXXFLAGS = -fPIC -fvisibility-inlines-hidden -pipe -Iinclude -Wall -Wextra -Wfatal-errors -Wno-unused-parameter -Wshadow
 LDLIBS = -lstdc++
 CORELDFLAGS = -rdynamic -L. $(LDFLAGS)
 PICLDFLAGS = -fPIC -shared -rdynamic $(LDFLAGS)
@@ -54,6 +54,10 @@ INSTMODE_LIB = 0640
   CORECXXFLAGS += -pedantic -Woverloaded-virtual -Wshadow -Wformat=2 -Wmissing-format-attribute
 @ENDIF
 
+@IFNEQ $(SYSTEM)-$(COMPILER) darwin-gcc
+  CORECXXFLAGS += -fvisibility=hidden
+@ENDIF
+
 @IFNEQ $(SYSTEM) darwin
   LDLIBS += -pthread
 @ENDIF
-- 
2.39.2