Linux: Add version script to restrict exported symbols (issue #1765)

cef.gyp

@@ -2090,6 +2090,14 @@
               },
             },
           }],
+          [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
+            'link_settings': {
+              'ldflags': [
+                # Only export necessary symbols from libcef.so.
+                '-Wl,--version-script=<!(cd <(DEPTH) && pwd -P)/cef/libcef_dll/libcef.lst',
+              ],
+            },
+          }],
         ],
       }],
     }],  # OS!="mac"

include/capi/cef_request_context_capi.h

@@ -279,7 +279,7 @@ CEF_EXPORT cef_request_context_t* cef_request_context_create_context(
 // Creates a new context object that shares storage with |other| and uses an
 // optional |handler|.
 ///
-CEF_EXPORT cef_request_context_t* create_context_shared(
+CEF_EXPORT cef_request_context_t* cef_create_context_shared(
     cef_request_context_t* other,
     struct _cef_request_context_handler_t* handler);
 

include/cef_request_context.h

@@ -104,7 +104,7 @@ class CefRequestContext : public virtual CefBase {
   // Creates a new context object that shares storage with |other| and uses an
   // optional |handler|.
   ///
-  /*--cef(capi_name=create_context_shared,optional_param=handler)--*/
+  /*--cef(capi_name=cef_create_context_shared,optional_param=handler)--*/
   static CefRefPtr<CefRequestContext> CreateContext(
       CefRefPtr<CefRequestContext> other,
       CefRefPtr<CefRequestContextHandler> handler);

libcef_dll/cpptoc/request_context_cpptoc.cc

@@ -58,7 +58,7 @@ CEF_EXPORT cef_request_context_t* cef_request_context_create_context(
   return CefRequestContextCppToC::Wrap(_retval);
 }
 
-CEF_EXPORT cef_request_context_t* create_context_shared(
+CEF_EXPORT cef_request_context_t* cef_create_context_shared(
     cef_request_context_t* other,
     struct _cef_request_context_handler_t* handler) {
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING

libcef_dll/ctocpp/request_context_ctocpp.cc

@@ -61,7 +61,7 @@ CefRefPtr<CefRequestContext> CefRequestContext::CreateContext(
   // Unverified params: handler
 
   // Execute
-  cef_request_context_t* _retval = create_context_shared(
+  cef_request_context_t* _retval = cef_create_context_shared(
       CefRequestContextCToCpp::Unwrap(other),
       CefRequestContextHandlerCppToC::Wrap(handler));
 

libcef_dll/libcef.lst

@@ -0,0 +1,9 @@
+# Copyright 2016 The Chromium Embedded Framework Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  /* Only export necessary symbols from libcef.so. */
+  global: cef_*;
+  local: *;
+};