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>

2 files changed, 3 insertions, 3 deletions

diff --git a/stoc/source/invocation/invocation.cxx b/stoc/source/invocation/invocation.cxx
index 68caa503d044..3fef7146355a 100644
--- a/stoc/source/invocation/invocation.cxx
+++ b/stoc/source/invocation/invocation.cxx
@@ -80,7 +80,7 @@ static OUString inv_getImplementationName()
 }
 
 // TODO: Implement centrally
-inline Reference<XIdlClass> TypeToIdlClass( const Type& rType, const Reference< XIdlReflection > & xRefl )
+static inline Reference<XIdlClass> TypeToIdlClass( const Type& rType, const Reference< XIdlReflection > & xRefl )
 {
     return xRefl->forName( rType.getTypeName() );
 }
@@ -1134,7 +1134,7 @@ Reference<XInterface> InvocationService::createInstanceWithArguments(
 }
 
 /// @throws RuntimeException
-Reference<XInterface> InvocationService_CreateInstance( const Reference<XComponentContext> & xCtx )
+static Reference<XInterface> InvocationService_CreateInstance( const Reference<XComponentContext> & xCtx )
 {
     Reference<XInterface> xService( *new InvocationService( xCtx ) );
     return xService;
diff --git a/stoc/source/javaloader/javaloader.cxx b/stoc/source/javaloader/javaloader.cxx
index 28aefc9fddf4..34d80b4f3b52 100644
--- a/stoc/source/javaloader/javaloader.cxx
+++ b/stoc/source/javaloader/javaloader.cxx
@@ -338,7 +338,7 @@ static Mutex & getInitMutex()
 }
 
 /// @throws Exception
-css::uno::Reference<XInterface> JavaComponentLoader_CreateInstance(const css::uno::Reference<XComponentContext> & xCtx)
+static css::uno::Reference<XInterface> JavaComponentLoader_CreateInstance(const css::uno::Reference<XComponentContext> & xCtx)
 {
     css::uno::Reference<XInterface> xRet;