Building test fails on Linux

[kwahoo2]

Hello,

During test compilation ('make' step) I get a lot of errors for undefined types like:

In file included from /home/adi/OpenXR-Hpp/build/include/openxr/openxr.hpp:174,
                 from /home/adi/OpenXR-Hpp/tests/a.cpp:2:
/home/adi/OpenXR-Hpp/build/include/openxr/openxr_dispatch_static.hpp:710:98: error: ‘XrApiLayerCreateInfo’ does not name a type; did you mean ‘XrActionSetCreateInfo’? 

Please see the attached file:

test-build.log

I've tried Fedora 42 and clean Ubuntu 22.04 LTS installation (OpenXR-SDK, OpenXR-Source-SDK and OpenXR-Hpp from git). The log is from the Ubuntu installation:

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.5 LTS
Release:        22.04
Codename:       jammy

[antoineemerit]

Hello,

I got the same error in my own code.
I solved this by including the file <openxr/openxr_loader_negotiation.h> before <openxr/openxr.hpp>.
You should do the same in the test source files.

[kwahoo2]

Thank you for the tip. Unfortunately it changes nothing for me.

[antoineemerit]

Hello,

I've take few difficulties to prepare the test environment on the OpenXR-HPP library, but now I can compile the test code.
So, for the first errors, you should also enable the extension prototype functions definition.

The a.cpp file should be :

#define XR_EXTENSION_PROTOTYPES 1
#include <openxr/openxr_loader_negotiation.h>
#include "openxr/openxr.hpp"
#include "xr_dependencies.h"

static xr::DispatchLoaderDynamic xr_dispatch{};

This fix the two first errors about the XrApiLayerCreateInfo/::xrApiLayerCreateInfo definitions.

But other errors occurs.

Regards
Antoine

[antoineemerit]

Next error is :

[ 28%] Built target generate_headers
[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_handles.hpp:87,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:176,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:3:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:10435:5: error: expected identifier before numeric constant
10435 |     4X450 = XR_MARKER_ARUCO_DICT_4X4_50_ML,
      |     ^~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:10435:5: error: expected ‘}’ before numeric constant
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:10433:39: note: to match this ‘{’
10433 | enum class MarkerArucoDictML: int32_t {

and

/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp: In function ‘const char* to_string_literal(SpatialMarkerArucoDictEXT)’:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:20593:41: error: expected unqualified-id before numeric constant
20593 |         case SpatialMarkerArucoDictEXT::4X450:
      |                                         ^~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:20593:39: error: expected ‘:’ before numeric constant
20593 |         case SpatialMarkerArucoDictEXT::4X450:
      |                                       ^ ~~~~~
      |                                       :
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_enums.hpp:20593:41: error: unable to find numeric literal operator ‘operator""X450’
20593 |         case SpatialMarkerArucoDictEXT::4X450:
      |                                         ^~~~~

this is caused by a definition that include numeric value as the attribut value, in the MarkerArucoDictML extension 👍

typedef enum XrMarkerArucoDictML {
    XR_MARKER_ARUCO_DICT_4X4_50_ML = 0,
    XR_MARKER_ARUCO_DICT_4X4_100_ML = 1,
    XR_MARKER_ARUCO_DICT_4X4_250_ML = 2,
    XR_MARKER_ARUCO_DICT_4X4_1000_ML = 3,
    XR_MARKER_ARUCO_DICT_5X5_50_ML = 4,
    XR_MARKER_ARUCO_DICT_5X5_100_ML = 5,
    XR_MARKER_ARUCO_DICT_5X5_250_ML = 6,
    XR_MARKER_ARUCO_DICT_5X5_1000_ML = 7,
    XR_MARKER_ARUCO_DICT_6X6_50_ML = 8,
    XR_MARKER_ARUCO_DICT_6X6_100_ML = 9,
    XR_MARKER_ARUCO_DICT_6X6_250_ML = 10,
    XR_MARKER_ARUCO_DICT_6X6_1000_ML = 11,
    XR_MARKER_ARUCO_DICT_7X7_50_ML = 12,
    XR_MARKER_ARUCO_DICT_7X7_100_ML = 13,
    XR_MARKER_ARUCO_DICT_7X7_250_ML = 14,
    XR_MARKER_ARUCO_DICT_7X7_1000_ML = 15,
    XR_MARKER_ARUCO_DICT_MAX_ENUM_ML = 0x7FFFFFFF
} XrMarkerArucoDictML;

the OpenXR-HPP create a attributs values list by splitting the enum after the XR_MARKER_ARUCO_DICT, causing nnumeric value name. This should be adapted.

Meaning while, if this extension is not used it can be disabled using 👍

#undef XR_ML_marker_understanding

before #include "openxr/openxr.hpp"

[antoineemerit]

We got another numeric enum problem with another extension, so adding a

#undef XR_EXT_spatial_marker_tracking

before #include "openxr/openxr.hpp"

[antoineemerit]

Now we got duplicated case :

[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_handles.hpp:88,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:176,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:5:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_exceptions.hpp: In function ‘void xr::exceptions::throwResultException(xr::Result, const char*)’:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_exceptions.hpp:2602:9: error: duplicate case value
 2602 |         case Result::ErrorExtensionDependencyNotEnabledKHR:
      |         ^~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_exceptions.hpp:2162:9: note: previously used here
 2162 |         case Result::ErrorExtensionDependencyNotEnabled:
      |         ^~~~

this seems normal :

../../OpenXR-Hpp/include/openxr/openxr_enums.hpp:  ErrorExtensionDependencyNotEnabled = XR_ERROR_EXTENSION_DEPENDENCY_NOT_ENABLED,
../../OpenXR-Hpp/include/openxr/openxr_enums.hpp:  ErrorExtensionDependencyNotEnabledKHR = XR_ERROR_EXTENSION_DEPENDENCY_NOT_ENABLED_KHR,
../../OpenXR-Hpp/include/openxr/openxr_enums.hpp:    case Result::ErrorExtensionDependencyNotEnabled:
../../OpenXR-Hpp/include/openxr/openxr_enums.hpp:      return "ErrorExtensionDependencyNotEnabled";
../../OpenXR-Hpp/include/openxr/openxr_enums.hpp:        // ErrorExtensionDependencyNotEnabledKHR is an alias for ErrorExtensionDependencyNotEnabled

and

./../OpenXR-SDK-Source/build/linux_debug/include/openxr/openxr.h:    XR_ERROR_EXTENSION_DEPENDENCY_NOT_ENABLED = -1000710001,
../../OpenXR-SDK-Source/build/linux_debug/include/openxr/openxr.h:    XR_ERROR_EXTENSION_DEPENDENCY_NOT_ENABLED_KHR = XR_ERROR_EXTENSION_DEPENDENCY_NOT_ENABLED,

in this case the ErrorExtensionDependencyNotEnabledKHR come from the XR_KHR_maintenance1 extension, that add retro-compatibility definitions/functions from OpenXR 1.0 to OpenXR 1.1.

This extension can be disabled using :

#undef XR_KHR_maintenance1

before #include "openxr/openxr.hpp"

But it may cause other errors if this extension is used for old application/test code.

[antoineemerit]

Next :

 [29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:176,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:6:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_handles.hpp:11061:5: error: ‘FutureEXT’ does not name a type; did you mean ‘XrFutureEXT’?
11061 |     FutureEXT createSpatialAnchorsAsyncML (
      |     ^~~~~~~~~
      |     XrFutureEXT

Watching the OpenXR Registry in ../../OpenXR-SDK-Source/specification/registry/xr.xml, XrFutureEXT description is :

<!-- Non-handle 64-bit opaque type from XR_EXT_future -->
        <type category="basetype"><type>XR_DEFINE_OPAQUE_64</type>(<name>XrFutureEXT</name>)</type>

and this is the only XR_DEFINE_OPAQUE_64 item :

#if !defined(XR_DEFINE_OPAQUE_64)
    #if (XR_PTR_SIZE == 8)
        #define <name>XR_DEFINE_OPAQUE_64</name>(object) typedef struct object##_T* object;
    #else
        #define XR_DEFINE_OPAQUE_64(object) typedef uint64_t object;
    #endif
#endif</type>

I suspect that this case is not managed by the OpenXR-HPP parser.

A workaround is to define an alias before #include openxr.hpp with :

using FutureEXT = XrFutureEXT;

Regards

[antoineemerit]

Next :

[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:177,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:7:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:8465:47: error: static assertion failed: Original type and wrapper have different size!
 8465 |      static_assert(sizeof(XrApiLayerNextInfo) == sizeof(ApiLayerNextInfo), "Original type and wrapper have different size!");
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:8465:47: note: the comparison reduces to ‘(296 == 288)’

This time the last 'next' member of the XrApiLayerNextInfo is not present in the HPP class.

It seems that the parsing has trouble bacause there are many next... members and the last one it 'next'' only, and is so not generated in the final class. If this member is renamed 'nextInfo' in the registry ../../OpenXR-SDK-Source/specification/registry/xr.xml it's working (but the structure is then not the correct one according to the API documentation) :

from :

<type category="struct" name="XrApiLayerNextInfo">
            <member><type>XrLoaderInterfaceStructs</type>     <name>structType</name></member>
            <member><type>uint32_t</type>                     <name>structVersion</name></member>
            <member><type>size_t</type>                       <name>structSize</name></member>
            <member><type>char</type>                         <name>layerName</name>[<enum>XR_MAX_API_LAYER_NAME_SIZE</enum>]</member>
            <member><type>PFN_xrGetInstanceProcAddr</type>    <name>nextGetInstanceProcAddr</name></member>
            <member><type>PFN_xrCreateApiLayerInstance</type> <name>nextCreateApiLayerInstance</name></member>
            <member>struct <type>XrApiLayerNextInfo</type>*   <name>next</name></member>
        </type>

to :

<type category="struct" name="XrApiLayerNextInfo">
            <member><type>XrLoaderInterfaceStructs</type>     <name>structType</name></member>
            <member><type>uint32_t</type>                     <name>structVersion</name></member>
            <member><type>size_t</type>                       <name>structSize</name></member>
            <member><type>char</type>                         <name>layerName</name>[<enum>XR_MAX_API_LAYER_NAME_SIZE</enum>]</member>
            <member><type>PFN_xrGetInstanceProcAddr</type>    <name>nextGetInstanceProcAddr</name></member>
            <member><type>PFN_xrCreateApiLayerInstance</type> <name>nextCreateApiLayerInstance</name></member>
            <member>struct <type>XrApiLayerNextInfo</type>*   <name>nextInfo</name></member>
        </type>

and regenerate the .hpp file from the OpenXR-HPP project, fix this problem (but I also rename back ApiLayerNextInfo::nextInfo to ApiLayerNextInfo::next in ../include/openxr/openxr_structs.hpp)

Regards

[antoineemerit]

Next :

[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:177,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:7:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp: In constructor ‘xr::CompositionLayerPassthroughFB::CompositionLayerPassthroughFB(const xr::CompositionLayerFla
gs&, const xr::Space&, const xr::PassthroughLayerFB&, const void*)’:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:24887:28: error: no matching function for call to ‘xr::CompositionLayerBaseHeader::CompositionLayerBaseHeader(xr::StructureType, const xr::Space&, const void*&)’
24887 | , layerHandle {layerHandle_}
      |                            ^
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3541:17: note: candidate: ‘xr::CompositionLayerBaseHeader::CompositionLayerBaseHeader(xr::StructureType, const xr::CompositionLayerFlags&, const xr::Space&, const void*)’
 3541 |                 CompositionLayerBaseHeader (
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3542:55: note:   no known conversion for argument 2 from ‘const xr::Space’ to ‘const xr::CompositionLayerFlags&’ {aka ‘const xr::Flags<xr::CompositionLayerFlagBits, long unsigned int>&’}
 3542 |   StructureType type_ ,  const CompositionLayerFlags& layerFlags_,  const Space& space_,  const void * next_ = nullptr                  )
      |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3535:25: note: candidate: ‘constexpr xr::CompositionLayerBaseHeader::CompositionLayerBaseHeader(const xr::CompositionLayerBaseHeader&)’
 3535 |     struct XR_MAY_ALIAS CompositionLayerBaseHeader : public impl::InputStructBase
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3535:25: note:   candidate expects 1 argument, 3 provided
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3535:25: note: candidate: ‘constexpr xr::CompositionLayerBaseHeader::CompositionLayerBaseHeader(xr::CompositionLayerBaseHeader&&)’
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:3535:25: note:   candidate expects 1 argument, 3 provided
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp: At global scope:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:24943:60: error: static assertion failed: Original type and wrapper have different size!
24943 |      static_assert(sizeof(XrCompositionLayerPassthroughFB) == sizeof(CompositionLayerPassthroughFB), "Original type and wrapper have different size!");
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In the registry we can see that XrCompositionLayerPassthroughFB "extends" (using parentstruct) CompositionLayerBaseHeader but the derivated class doesn't call the constructor with the parameters in the right order; this caused by the third base parameter which is not the same name as the parent class (flags vs layerFlags).

I also see that there are many CompositionLayerBaseHeader derivated structures with the same problems.

So there are two workaround :

1. disable this extension using

#undef XR_FB_passthrough
#undef XR_META_passthrough_layer_resumed_event
#undef XR_META_passthrough_color_lut

I'm working on Quest headset , so I would prefer the second option, but for the OpenXR-HPP test compilation I use the first.

Regards

[antoineemerit]

Ordering problem with :

 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:177,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:8:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:29533:67: error: invalid use of incomplete type ‘struct xr::FutureCompletionBaseHeaderEXT’
29533 |     struct XR_MAY_ALIAS CreateSpatialAnchorsCompletionML : public FutureCompletionBaseHeaderEXT
      |                                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_handles.hpp:91,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:176:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs_forward.hpp:598:8: note: forward declaration of ‘struct xr::FutureCompletionBaseHeaderEXT’
  598 | struct FutureCompletionBaseHeaderEXT;
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

where the class FutureCompletionBaseHeaderEXT is not fully defined before the CreateSpatialAnchorsCompletionML class, because the XR_ML_spatial_anchors extension (number=141) depends on the XR_EXT_future extension (number=470) and the Registry API parser sort the extensions by number.

Let's try to disable this extension 👍

#undef XR_ML_spatial_anchors
#undef XR_ML_spatial_anchors_storage

Regards

[antoineemerit]

Other error :

[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:177,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:11:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp: In constructor ‘xr::EnvironmentDepthImageMETA::EnvironmentDepthImageMETA(uint32_t, float, float, const xr::EnvironmentDepthImageViewMETA&, const void*)’:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:44592:27: error: cannot convert ‘const xr::EnvironmentDepthImageViewMETA’ to ‘const void*’
44592 |             memcpy(views, views_, sizeof(views));
      |                           ^~~~~~
      |                           |
      |                           const xr::EnvironmentDepthImageViewMETA
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:105:
/usr/include/string.h:43:70: note:   initializing argument 2 of ‘void* memcpy(void*, const void*, size_t)’
   43 | extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
      |                                               ~~~~~~~~~~~~~~~~~~~~~~~^~~~~

The memcpy second parameter call views_ is neither an address nor an array, it' a reference :

const EnvironmentDepthImageViewMETA& views_

but in the registry it' defined as an array of two items :

   <type category="struct" name="XrEnvironmentDepthImageMETA">
            <member values="XR_TYPE_ENVIRONMENT_DEPTH_IMAGE_META"><type>XrStructureType</type> <name>type</name></member>
            <member>const <type>void</type>*                     <name>next</name></member>
            <member><type>uint32_t</type>                        <name>swapchainIndex</name></member>
            <member><type>float</type>                           <name>nearZ</name></member>
            <member><type>float</type>                           <name>farZ</name></member>
            <member><type>XrEnvironmentDepthImageViewMETA</type> <name>views</name>[2]</member>
        </type>

and the class member target views is correct :

EnvironmentDepthImageViewMETA views[2];

So this only problem is the class contructor parameter. We could modify the memcpy call to use &views_ but the sizeof(views_) need to be changed too.

So the now workaround is to disable this extension with #undef XR_META_environment_depth.

[antoineemerit]

Next :

[ 29%] Building CXX object tests/CMakeFiles/a.dir/a.cpp.o
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:177,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/tests/a.cpp:12:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:51814:61: error: invalid use of incomplete type ‘struct xr::FutureCompletionBaseHeaderEXT’
51814 |     struct XR_MAY_ALIAS SenseDataQueryCompletionBD : public FutureCompletionBaseHeaderEXT
      |                                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_handles.hpp:91,
                 from /home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr.hpp:176:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs_forward.hpp:598:8: note: forward declaration of ‘struct xr::FutureCompletionBaseHeaderEXT’
  598 | struct FutureCompletionBaseHeaderEXT;
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp: In constructor ‘xr::SenseDataQueryCompletionBD::SenseDataQueryCompletionBD(void*)’:
/home/antoine/AndroidStudioProjects/Bille2_VR/OpenXR-Hpp/build/include/openxr/openxr_structs.hpp:51823:3: error: type ‘xr::FutureCompletionBaseHeaderEXT’ is not a direct base of ‘xr::SenseDataQueryCompletionBD’

is another class ordering problem with Future* class.

Workaround :

#undef XR_BD_spatial_scene
#undef XR_BD_spatial_sensing
#undef XR_BD_spatial_anchor
#undef XR_BD_spatial_anchor_sharing

[antoineemerit]

So now a.cpp compiles successfully.
But, off course, the same errors appear when compiling the other source files ({b,c,d,e,f,flags...}.cpp).

I've created a tofix.h source file in the same directory as a.cpp (../tests/tofix.cpp from the build directory) :

#undef XR_NO_PROTOTYPES
#define XR_EXTENSION_PROTOTYPES 1
#include <openxr/openxr_loader_negotiation.h>
#undef XR_KHR_maintenance1
#undef XR_EXT_spatial_marker_tracking
#undef XR_FB_passthrough
#undef XR_FB_passthrough_keyboard_hands
#undef XR_META_passthrough_color_lut
#undef XR_META_passthrough_layer_resumed_event
#undef XR_META_environment_depth
#undef XR_ML_marker_understanding
#undef XR_ML_spatial_anchors
#undef XR_ML_spatial_anchors_storage
#undef XR_BD_spatial_scene
#undef XR_BD_spatial_sensing
#undef XR_BD_spatial_anchor
#undef XR_BD_spatial_anchor_sharing
using FutureEXT = XrFutureEXT;

and I include it before any #include "openxr/openxr.hpp in all the sources; I've also include this file in few generated test source files like ./tests/buildcleanly_openxr_dispatch_static.cpp (#include "../../tests/tofix.h")

=> all the test compile and link.

==> but of course, all this is just a dirty workaround, and the real problems should be solved to make the OpenXR-HPP fully functionnal with all the extensions ==> TO DO

[kwahoo2]

One thing I've noticed, OpenXR-Hpp and OpenXR versions have to match (no forward compatibility?). If I use version 1.0.26 from tarballs OpenXR-Hpp-release-1.0.26.tar.gz OpenXR-SDK-Source-release-1.0.26.tar.gz everything builds correctly.

[antoineemerit]

Seems logic, but 1.0.26 is the last published OpenXR-HPP tag, and I use the last 1.1.49 OpenXR-SDK.