Ensure RTTI symbol visibility for Linux Clang -fsanitize=function,vptr

The problem being that any lib later loaded via osl_loadModule (e.g.,
libgcc3_uno.so) would not bind to the same global (RTTI-related) symbols as
libsofficeapp.so and its dependencies (so, e.g., -fsanitize=function would
erroneously assume that bridges/source/cpp_uno/shared/component.cxx's
uno_initEnvironment is called with a different, non-matching uno_Environment
type).

Change-Id: I08b0cbc1f9eb74641eb617c46587a0a528a56c31

compilerplugins/clang/checkconfigmacros.cxx

@@ -129,9 +129,14 @@ void CheckConfigMacros::checkMacro( const Token& macroToken, SourceLocation loca
     {
     if( configMacros.find( macroToken.getIdentifierInfo()->getName()) != configMacros.end())
         {
-        report( DiagnosticsEngine::Error, "checking whether a config macro %0 is defined",
-            location ) << macroToken.getIdentifierInfo()->getName();
-        report( DiagnosticsEngine::Note, "use #if instead of #ifdef/#ifndef/defined", location );
+        const char* filename = compiler.getSourceManager().getPresumedLoc( location ).getFilename();
+        if( filename == NULL
+            || strncmp( filename, SRCDIR "/include/LibreOfficeKit/", strlen( SRCDIR "/include/LibreOfficeKit/" )) != 0 )
+            {
+            report( DiagnosticsEngine::Error, "checking whether a config macro %0 is defined",
+                location ) << macroToken.getIdentifierInfo()->getName();
+            report( DiagnosticsEngine::Note, "use #if instead of #ifdef/#ifndef/defined", location );
+            }
         }
     }
 

include/LibreOfficeKit/LibreOfficeKitInit.h

@@ -39,7 +39,14 @@ extern "C"
 
     void *_dlopen(const char *pFN)
     {
-        return dlopen(pFN, RTLD_LAZY);
+        return dlopen(pFN, RTLD_LAZY
+#if defined __clang__ && defined __linux__ \
+    && defined ENABLE_RUNTIME_OPTIMIZATIONS
+#if !ENABLE_RUNTIME_OPTIMIZATIONS
+                      | RTLD_GLOBAL
+#endif
+#endif
+                      );
     }
 
     void *_dlsym(void *Hnd, const char *pName)

libreofficekit/qa/unit/tiledrendering.cxx

@@ -19,6 +19,8 @@
 #include <osl/file.hxx>
 #include <rtl/bootstrap.hxx>
 
+#include <config_options.h>
+    // see use of ENABLE_RUNTIME_OPTIMIZATIONS in LibreOfficeKintInit.h
 #define LOK_USE_UNSTABLE_API
 #include <LibreOfficeKit/LibreOfficeKitInit.h>
 #include <LibreOfficeKit/LibreOfficeKit.hxx>