limit symbols exported when using --enable-mergelibs

when doing LTO and --enable-mergelibs, we can improve the effectiveness
of LTO by marking more code as internal to the merged library.

So introduce a new macro UNLESS_MERGELIBS, which we can wrap around
*_DLLPUBLIC annotations

Also introduced here is a script that can be run on a completed build to
determine which classes can be marked with this macro.

Change-Id: I73fb87c897489da53791277d0b66b01f884ba061
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89991
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 448 insertions, 0 deletions

diff --git a/bin/find-mergedlib-can-be-private.classes.results b/bin/find-mergedlib-can-be-private.classes.results
new file mode 100644
index 000000000000..0d8f9b808e15
--- /dev/null
+++ b/bin/find-mergedlib-can-be-private.classes.results
@@ -0,0 +1,448 @@
+Accelerator
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+B3dViewport
+BitmapMedianFilter
+BitmapMonochromeMatrixFilter
+BitmapPalette
+BitmapPopArtFilter
+BitmapSobelGreyFilter
+CalendarField
+CodeCompleteDataCache
+ConvertChar
+CurrencyBox
+CurrencyFormatter
+CursorWrapper
+DateBox
+DateField
+DdeGetPutItem
+DdeHotLink
+DdeItem
+DdeLink
+DdeService
+DdeTopic
+DockingAreaWindow
+DockingManager
+DoubleCurrencyField
+DoubleNumericField
+E3dCompoundObject
+E3dDefaultAttributes
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+E3dPolygonObj
+EditAbstractDialogFactory
+EditUndo
+EditUndoManager
+EditViewCallbacks
+EnhancedCustomShape
+EnhancedCustomShape::FunctionParser
+FileChangedChecker
+FilterMatch
+FixedBitmap
+FixedHyperlink
+FmDesignModeChangedHint
+FmFormObj
+FmFormPageImpl
+FmXFormShell
+FontSelectPattern
+FontSizeNames
+FontSubsetInfo
+FormattedField::StaticFormatter
+FormatterBase
+FreetypeManager::IFSD_Equal
+GroupBox
+HelpLinker
+Hunspell
+Hunzip
+INetMIMEMessage
+INetMIMEMessageStream
+ImageControl
+ImplJobSetup
+IndexerPreProcessor
+IntroWindow
+ListenerMultiplexerBase
+LongCurrencyBox
+LongCurrencyField
+LongCurrencyFormatter
+MenuToggleButton
+MetaAction
+MetaArcAction
+MetaBmpAction
+MetaBmpExScalePartAction
+MetaBmpScaleAction
+MetaBmpScalePartAction
+MetaChordAction
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+MetaEllipseAction
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+MetaGradientExAction
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+MetaISectRegionClipRegionAction
+MetaLayoutModeAction
+MetaMapModeAction
+MetaMoveClipRegionAction
+MetaOverlineColorAction
+MetaPieAction
+MetaPixelAction
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+MetaPopAction
+MetaPushAction
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+MetaRefPointAction
+MetaRoundRectAction
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+MetaTextArrayAction
+MetaTextColorAction
+MetaTextFillColorAction
+MetaTextLanguageAction
+MetaTextLineColorAction
+MetaWallpaperAction
+MetafileAccessor
+ModuleSizeExceeded
+MoreButton
+MultiListBox
+MyThes
+NativeNumberWrapper
+NfCurrencyEntry
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+OpenFileDropTargetListener
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+Point
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+SvParser<HtmlTokenId>::TokenStackType
+SvParser<int>::TokenStackType
+SvtBasePrintOptions
+SvtPrintFileOptions
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+Svx3DTextureProjectionYItem
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+avmedia::MediaControlBase
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+basegfx::BColorModifier
+basegfx::BColorModifierStack
+basegfx::BColorModifier_RGBLuminanceContrast
+basegfx::BColorModifier_black_and_white
+basegfx::BColorModifier_gamma
+basegfx::BColorModifier_gray
+basegfx::BColorModifier_invert
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+basegfx::MinimalSystemDependentDataManager
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+basegfx::RasterConverter3D
+basegfx::SystemDependentDataHolder
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+basegfx::triangulator
+canvas
+char& std::vector<char, std::allocator<char> >
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+drawinglayer::primitive2d::GroupPrimitive2D
+drawinglayer::primitive2d::HelplinePrimitive2D
+drawinglayer::primitive2d::InvertPrimitive2D
+drawinglayer::primitive2d::MarkerArrayPrimitive2D
+drawinglayer::primitive2d::MediaPrimitive2D
+drawinglayer::primitive2d::MetafilePrimitive2D
+drawinglayer::primitive2d::ObjectAndViewTransformationDependentPrimitive2D
+drawinglayer::primitive2d::PagePreviewPrimitive2D
+drawinglayer::primitive2d::PolyPolygonGradientPrimitive2D
+drawinglayer::primitive2d::PolyPolygonGraphicPrimitive2D
+drawinglayer::primitive2d::PolyPolygonHatchPrimitive2D
+drawinglayer::primitive2d::PolyPolygonSelectionPrimitive2D
+drawinglayer::primitive2d::PolygonMarkerPrimitive2D
+drawinglayer::primitive2d::PolygonStrokeArrowPrimitive2D
+drawinglayer::primitive2d::ScenePrimitive2D
+drawinglayer::primitive2d::SdrFrameBorderData::SdrConnectStyleData
+drawinglayer::primitive2d::ShadowPrimitive2D
+drawinglayer::primitive2d::TextHierarchyBlockPrimitive2D
+drawinglayer::primitive2d::TextHierarchyBulletPrimitive2D
+drawinglayer::primitive2d::TextHierarchyEditPrimitive2D
+drawinglayer::primitive2d::TextHierarchyFieldPrimitive2D
+drawinglayer::primitive2d::TextHierarchyLinePrimitive2D
+drawinglayer::primitive2d::TextHierarchyParagraphPrimitive2D
+drawinglayer::primitive2d::ViewTransformationDependentPrimitive2D
+drawinglayer::primitive2d::ViewportDependentPrimitive2D
+drawinglayer::primitive2d::WrongSpellPrimitive2D
+drawinglayer::primitive3d
+drawinglayer::primitive3d::BasePrimitive3D
+drawinglayer::primitive3d::BufferedDecompositionPrimitive3D
+drawinglayer::primitive3d::GroupPrimitive3D
+drawinglayer::primitive3d::ModifiedColorPrimitive3D
+drawinglayer::primitive3d::PolyPolygonMaterialPrimitive3D
+drawinglayer::primitive3d::PolygonHairlinePrimitive3D
+drawinglayer::primitive3d::Primitive3DContainer
+drawinglayer::primitive3d::SdrCubePrimitive3D
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+drawinglayer::primitive3d::SdrPrimitive3D
+drawinglayer::primitive3d::SdrSpherePrimitive3D
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+drawinglayer::processor2d::HitTestProcessor2D
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+linguistic::SpellAlternatives
+psp::PrintFontManager::PrintFont
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+sdr::contact::ObjectContactPainter
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+vcl::ILibreOfficeKitNotifier
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+vcl::OldStylePrintAdaptor
+vcl::PDFWriter::AnyWidget
+vcl::test::OutputDeviceTestGradient
+void OpenGLTexture
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