New loplugin:external

...warning about (for now only) functions and variables with external linkage
that likely don't need it.

The problems with moving entities into unnamed namespacs and breaking ADL
(as alluded to in comments in compilerplugins/clang/external.cxx) are
illustrated by the fact that while

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    struct S2: S1 { int f() { return 1; } };
    int f(S2 s) { return s.f(); }
  }
  int main() { return f(N::S2()); }

returns 1, both moving just the struct S2 into an nunnamed namespace,

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    namespace { struct S2: S1 { int f() { return 1; } }; }
    int f(S2 s) { return s.f(); }
  }
  int main() { return f(N::S2()); }

as well as moving just the function f overload into an unnamed namespace,

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    struct S2: S1 { int f() { return 1; } };
    namespace { int f(S2 s) { return s.f(); } }
  }
  int main() { return f(N::S2()); }

would each change the program to return 0 instead.

Change-Id: I4d09f7ac5e8f9bcd6e6bde4712608444b642265c
Reviewed-on: https://gerrit.libreoffice.org/60539
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

3 files changed, 3 insertions, 3 deletions

diff --git a/formula/source/core/api/FormulaCompiler.cxx b/formula/source/core/api/FormulaCompiler.cxx
index 6580ea898e75..c2a9466ebbb7 100644
--- a/formula/source/core/api/FormulaCompiler.cxx
+++ b/formula/source/core/api/FormulaCompiler.cxx
@@ -833,7 +833,7 @@ FormulaCompiler::OpCodeMapPtr FormulaCompiler::CreateOpCodeMap(
     return xMap;
 }
 
-void lcl_fillNativeSymbols( FormulaCompiler::NonConstOpCodeMapPtr& xMap, bool bDestroy = false )
+static void lcl_fillNativeSymbols( FormulaCompiler::NonConstOpCodeMapPtr& xMap, bool bDestroy = false )
 {
     static OpCodeMapData aSymbolMap;
     osl::MutexGuard aGuard(&aSymbolMap.maMtx);
diff --git a/formula/source/core/api/token.cxx b/formula/source/core/api/token.cxx
index 43c152ee7161..84a8e4bc6834 100644
--- a/formula/source/core/api/token.cxx
+++ b/formula/source/core/api/token.cxx
@@ -43,7 +43,7 @@ namespace formula
 
 // --- helpers --------------------------------------------------------------
 
-inline bool lcl_IsReference( OpCode eOp, StackVar eType )
+static inline bool lcl_IsReference( OpCode eOp, StackVar eType )
 {
     return
         (eOp == ocPush && (eType == svSingleRef || eType == svDoubleRef))
diff --git a/formula/source/ui/dlg/FormulaHelper.cxx b/formula/source/ui/dlg/FormulaHelper.cxx
index 8bcdb516a21a..ed7d28b0612f 100644
--- a/formula/source/ui/dlg/FormulaHelper.cxx
+++ b/formula/source/ui/dlg/FormulaHelper.cxx
@@ -179,7 +179,7 @@ void FormulaHelper::GetArgStrings( ::std::vector< OUString >& _rArgs,
 }
 
 
-inline bool IsFormulaText( const CharClass* _pCharClass,const OUString& rStr, sal_Int32 nPos )
+static inline bool IsFormulaText( const CharClass* _pCharClass,const OUString& rStr, sal_Int32 nPos )
 {
     if( _pCharClass->isLetterNumeric( rStr, nPos ) )
         return true;