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From a7c1f5fce6303a643fadff7d85d59934bd0cf6b6 Mon Sep 17 00:00:00 2001
From: Aaron Plattner <aplattner@nvidia.com>
Date: Mon, 18 May 2020 15:27:01 -0700
Subject: [PATCH] nvidia-settings: Make VDPAUDeviceFunctions static to
ctkvdpau.c
GCC 10 defaults to building with -fno-common, which exposes a bug in
nvidia-settings: The VDPAUDeviceFunctions structure is defined as global in
ctkvdpau.h, so both ctkvdpau.o and ctkwindow.o have it as a global, non-static
"tentative definition" symbol. The GCC 10 man page describes it like this:
-fcommon
In C code, this option controls the placement of global variables
defined without an initializer, known as tentative definitions in
the C standard. Tentative definitions are distinct from
declarations of a variable with the "extern" keyword, which do not
allocate storage.
The default is -fno-common, which specifies that the compiler
places uninitialized global variables in the BSS section of the
object file. This inhibits the merging of tentative definitions by
the linker so you get a multiple-definition error if the same
variable is accidentally defined in more than one compilation unit.
The -fcommon places uninitialized global variables in a common
block. This allows the linker to resolve all tentative definitions
of the same variable in different compilation units to the same
object, or to a non-tentative definition. This behavior is
inconsistent with C++, and on many targets implies a speed and code
size penalty on global variable references. It is mainly useful to
enable legacy code to link without errors.
Since the copy of VDPAUDeviceFunctions in ctkwindow.o is not used, just remove
it by moving the definition of this structure into ctkvdpau.c.
---
src/gtk+-2.x/ctkvdpau.c | 23 +++++++++++++++++++++++
src/gtk+-2.x/ctkvdpau.h | 24 ------------------------
2 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/src/gtk+-2.x/ctkvdpau.c b/src/gtk+-2.x/ctkvdpau.c
index 2f120f0..6149c28 100644
--- a/src/gtk+-2.x/ctkvdpau.c
+++ b/src/gtk+-2.x/ctkvdpau.c
@@ -103,6 +103,29 @@ const gchar* __video_mixer_parameter_help =
const gchar* __video_mixer_attribute_help =
"This shows the video mixer attributes and any applicable ranges.";
+static struct VDPAUDeviceImpl {
+
+ VdpGetErrorString *GetErrorString;
+ VdpGetProcAddress *GetProcAddress;
+ VdpGetApiVersion *GetApiVersion;
+ VdpGetInformationString *GetInformationString;
+ VdpVideoSurfaceQueryCapabilities *VideoSurfaceQueryCapabilities;
+ VdpVideoSurfaceQueryGetPutBitsYCbCrCapabilities
+ *VideoSurfaceQueryGetPutBitsYCbCrCapabilities;
+ VdpOutputSurfaceQueryCapabilities *OutputSurfaceQueryCapabilities;
+ VdpOutputSurfaceQueryGetPutBitsNativeCapabilities
+ *OutputSurfaceQueryGetPutBitsNativeCapabilities;
+ VdpOutputSurfaceQueryPutBitsYCbCrCapabilities
+ *OutputSurfaceQueryPutBitsYCbCrCapabilities;
+ VdpBitmapSurfaceQueryCapabilities *BitmapSurfaceQueryCapabilities;
+ VdpDecoderQueryCapabilities *DecoderQueryCapabilities;
+ VdpVideoMixerQueryFeatureSupport *VideoMixerQueryFeatureSupport;
+ VdpVideoMixerQueryParameterSupport *VideoMixerQueryParameterSupport;
+ VdpVideoMixerQueryAttributeSupport *VideoMixerQueryAttributeSupport;
+ VdpVideoMixerQueryParameterValueRange *VideoMixerQueryParameterValueRange;
+ VdpVideoMixerQueryAttributeValueRange *VideoMixerQueryAttributeValueRange;
+} VDPAUDeviceFunctions;
+
static int queryOutputSurface(CtkVDPAU *ctk_vdpau, VdpDevice device,
VdpGetProcAddress *getProcAddress);
diff --git a/src/gtk+-2.x/ctkvdpau.h b/src/gtk+-2.x/ctkvdpau.h
index ec58d36..2652f6f 100644
--- a/src/gtk+-2.x/ctkvdpau.h
+++ b/src/gtk+-2.x/ctkvdpau.h
@@ -45,30 +45,6 @@ G_BEGIN_DECLS
#define CTK_VDPAU_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), CTK_TYPE_VDPAU, CtkVDPAUClass))
-
-struct VDPAUDeviceImpl {
-
- VdpGetErrorString *GetErrorString;
- VdpGetProcAddress *GetProcAddress;
- VdpGetApiVersion *GetApiVersion;
- VdpGetInformationString *GetInformationString;
- VdpVideoSurfaceQueryCapabilities *VideoSurfaceQueryCapabilities;
- VdpVideoSurfaceQueryGetPutBitsYCbCrCapabilities
- *VideoSurfaceQueryGetPutBitsYCbCrCapabilities;
- VdpOutputSurfaceQueryCapabilities *OutputSurfaceQueryCapabilities;
- VdpOutputSurfaceQueryGetPutBitsNativeCapabilities
- *OutputSurfaceQueryGetPutBitsNativeCapabilities;
- VdpOutputSurfaceQueryPutBitsYCbCrCapabilities
- *OutputSurfaceQueryPutBitsYCbCrCapabilities;
- VdpBitmapSurfaceQueryCapabilities *BitmapSurfaceQueryCapabilities;
- VdpDecoderQueryCapabilities *DecoderQueryCapabilities;
- VdpVideoMixerQueryFeatureSupport *VideoMixerQueryFeatureSupport;
- VdpVideoMixerQueryParameterSupport *VideoMixerQueryParameterSupport;
- VdpVideoMixerQueryAttributeSupport *VideoMixerQueryAttributeSupport;
- VdpVideoMixerQueryParameterValueRange *VideoMixerQueryParameterValueRange;
- VdpVideoMixerQueryAttributeValueRange *VideoMixerQueryAttributeValueRange;
-} VDPAUDeviceFunctions;
-
/* Generic description structure */
typedef struct
{
--
2.27.0
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