Embree compilation fails when specifying -march=x86-64-v3 version

[xana43]

Tested versions

found in Godot v4.2.3.rc (c8356fb) (when I pulled version 4.2.2 there was a commit that changed it's version to 4.2.3 but nothing else was changed)

System information

Godot v4.2.3.rc (c8356fb) - Fedora Linux 40 (KDE Plasma) - Wayland - Vulkan (Forward+) - dedicated AMD Radeon RX 7900 XT (RADV NAVI31) () - AMD Ryzen 9 7950X 16-Core Processor (32 Threads)

Issue description

When compiling the godot editor with the option -march=x86-64-v3 it errors out giving this error NOTE: using -march=x86-64-v2 or -march=x86-64 does not error out

/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::BVH4Factory::BVH4Triangle4i(embree::Scene*, embree::BVHFactory::BuildVariant, embree::BVHFactory::IntersectVariant)':
<artificial>:(.text+0x6486): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::BVH4Factory::BVH4QuantizedTriangle4i(embree::Scene*)':
<artificial>:(.text+0x6f77): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleM<4> >::build()':
<artificial>:(.text+0x3dfc6): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x3e89d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x3e8d3): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAHQuantized<4, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x44a48): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x44e64): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x45a86): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x4635d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x46393): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleMv<4> >::build()':
<artificial>:(.text+0x46d26): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x475fd): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x47633): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderFastSpatialSAH<4, embree::TriangleMesh, embree::TriangleMi<4>, embree::avx2::TriangleSplitterFactory>::build()':
<artificial>:(.text+0x4ab8c): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x4b08b): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4b0cc): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4b192): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderFastSpatialSAH<4, embree::TriangleMesh, embree::TriangleMv<4>, embree::avx2::TriangleSplitterFactory>::build()':
<artificial>:(.text+0x4c16c): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x4c66b): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4c6ac): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4c772): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderFastSpatialSAH<4, embree::TriangleMesh, embree::TriangleM<4>, embree::avx2::TriangleSplitterFactory>::build()':
<artificial>:(.text+0x4d74c): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x4dc4b): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4dc8c): undefined reference to `embree::BVHN<4>::layoutLargeNodes(unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x4dd52): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `RaycastOcclusionCull::Scenario::update() [clone .part.0]':
<artificial>:(.text+0x52f81): undefined reference to `embree::avx2::BVH4Triangle4Intersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x52f88): undefined reference to `embree::avx2::BVH4Triangle4Intersector8HybridMoellerNoFilter()'
/usr/bin/ld: <artificial>:(.text+0x52f8f): undefined reference to `embree::avx2::BVH4Triangle4iIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x52f96): undefined reference to `embree::avx2::BVH4Triangle4vIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x52f9d): undefined reference to `embree::avx2::BVH4Triangle4iIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x52fa4): undefined reference to `embree::avx2::BVH4Triangle4vMBIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x52fab): undefined reference to `embree::avx2::BVH4Triangle4iMBIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x52fb2): undefined reference to `embree::avx2::BVH4Triangle4vMBIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x52fb9): undefined reference to `embree::avx2::BVH4Triangle4iMBIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x5313e): undefined reference to `embree::avx2::BVH8Triangle4iIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x53146): undefined reference to `embree::avx2::BVH8Triangle4Intersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x5314e): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x53156): undefined reference to `embree::avx2::BVH8Triangle4iIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x5315e): undefined reference to `embree::avx2::BVH8Triangle4iIntersector4HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x53165): undefined reference to `embree::avx2::BVH8Triangle4vIntersector1Woop()'
/usr/bin/ld: <artificial>:(.text+0x5316c): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector4HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x53173): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x5317c): undefined reference to `embree::avx2::BVH8Triangle4vIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x53185): undefined reference to `embree::avx2::BVH8Triangle4Intersector4HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x53192): undefined reference to `embree::avx2::BVH8Triangle4Intersector8HybridMoellerNoFilter()'
/usr/bin/ld: <artificial>:(.text+0x5319c): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector8HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x531a5): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector4HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x531ad): undefined reference to `embree::avx2::BVH8Triangle4iIntersector4HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x531bc): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector8HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x531c6): undefined reference to `embree::avx2::BVH8Triangle4Intersector4HybridMoellerNoFilter()'
/usr/bin/ld: <artificial>:(.text+0x531d0): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector4HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x531e0): undefined reference to `embree::avx2::BVH8Triangle4vIntersector4HybridPluecker()'
/usr/bin/ld: <artificial>:(.text+0x531e9): undefined reference to `embree::avx2::QBVH8Triangle4iIntersector1Pluecker()'
/usr/bin/ld: <artificial>:(.text+0x531f2): undefined reference to `embree::avx2::QBVH8Triangle4Intersector1Moeller()'
/usr/bin/ld: <artificial>:(.text+0x53202): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector4HybridMoeller()'
/usr/bin/ld: <artificial>:(.text+0x5320b): undefined reference to `embree::avx2::BVH8Triangle4Intersector1Moeller()'
/usr/bin/ld: <artificial>:(.text+0x53219): undefined reference to `embree::avx2::BVH8Triangle4vIntersector1Pluecker()'
/usr/bin/ld: <artificial>:(.text+0x53222): undefined reference to `embree::avx2::BVH8Triangle4iIntersector1Pluecker()'
/usr/bin/ld: <artificial>:(.text+0x5322c): undefined reference to `embree::avx2::BVH8Triangle4iIntersector1Moeller()'
/usr/bin/ld: <artificial>:(.text+0x5323b): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector1Pluecker()'
/usr/bin/ld: <artificial>:(.text+0x53244): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector1Pluecker()'
/usr/bin/ld: <artificial>:(.text+0x53252): undefined reference to `embree::avx2::BVH8Triangle4vMBIntersector1Moeller()'
/usr/bin/ld: <artificial>:(.text+0x5325b): undefined reference to `embree::avx2::BVH8Triangle4iMBIntersector1Moeller()'
/usr/bin/ld: <artificial>:(.text+0x5326e): undefined reference to `embree::avx2::BVH8IntersectorStreamPacketFallback()'
/usr/bin/ld: <artificial>:(.text+0x53275): undefined reference to `embree::avx2::BVH8Triangle4IntersectorStreamMoeller()'
/usr/bin/ld: <artificial>:(.text+0x5327c): undefined reference to `embree::avx2::BVH8Triangle4IntersectorStreamMoellerNoFilter()'
/usr/bin/ld: <artificial>:(.text+0x53283): undefined reference to `embree::avx2::BVH8Triangle4iIntersectorStreamMoeller()'
/usr/bin/ld: <artificial>:(.text+0x5328a): undefined reference to `embree::avx2::BVH8Triangle4vIntersectorStreamPluecker()'
/usr/bin/ld: <artificial>:(.text+0x53291): undefined reference to `embree::avx2::BVH8Triangle4iIntersectorStreamPluecker()'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::Scene::commit_task() [clone .part.0]':
<artificial>:(.text+0x59087): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleM<4> >::build()':
<artificial>:(.text+0x3ea28): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAHQuantized<4, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x44fa8): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x464e8): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans15.ltrans.o: in function `embree::avx2::BVHNBuilderSAH<4, embree::TriangleMv<4> >::build()':
<artificial>:(.text+0x47788): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderMBlurSAH<4, embree::TriangleMesh, embree::TriangleMvMB<4> >::build()':
<artificial>:(.text+0x58f05): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x593b4): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderMBlurSAH<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x59b55): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x5a004): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x5ee76): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x5f7cd): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x5f9e8): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x5fb87): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x601f6): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMv<4> >::build()':
<artificial>:(.text+0x605f6): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x60f4d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x61168): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x61307): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x61976): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleM<4> >::build()':
<artificial>:(.text+0x61d76): undefined reference to `embree::BVHN<4>::preBuild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: <artificial>:(.text+0x626cd): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x628e8): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x62a87): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x630f6): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderMBlurSAH<4, embree::TriangleMesh, embree::TriangleMvMB<4> >::build()':
<artificial>:(.text+0x5950a): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderMBlurSAH<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x5a15a): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x5fc1c): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMv<4> >::build()':
<artificial>:(.text+0x6139c): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans16.ltrans.o: in function `embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleM<4> >::build()':
<artificial>:(.text+0x62b1c): undefined reference to `embree::BVHN<4>::postBuild(double)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans17.ltrans.o: in function `embree::TaskScheduler::ClosureTaskFunction<embree::TaskScheduler::spawn<unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleM<4> >::build()::{lambda(embree::range<unsigned long> const&)#2}>(unsigned long, unsigned long, unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleM<4> >::build()::{lambda(embree::range<unsigned long> const&)#2} const&)::{lambda()#1}>::execute()':
<artificial>:(.text+0x40482): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans17.ltrans.o: in function `embree::TaskScheduler::ClosureTaskFunction<embree::TaskScheduler::spawn<unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMv<4> >::build()::{lambda(embree::range<unsigned long> const&)#2}>(unsigned long, unsigned long, unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMv<4> >::build()::{lambda(embree::range<unsigned long> const&)#2} const&)::{lambda()#1}>::execute()':
<artificial>:(.text+0x41712): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans17.ltrans.o: in function `embree::TaskScheduler::ClosureTaskFunction<embree::TaskScheduler::spawn<unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()::{lambda(embree::range<unsigned long> const&)#2}>(unsigned long, unsigned long, unsigned long, embree::avx2::BVHNBuilderTwoLevel<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()::{lambda(embree::range<unsigned long> const&)#2} const&)::{lambda()#1}>::execute()':
<artificial>:(.text+0x429a2): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans18.ltrans.o: in function `embree::avx2::BVHNMeshBuilderMorton<4, embree::TriangleMesh, embree::TriangleMi<4> >::build()':
<artificial>:(.text+0x5225f): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x52279): undefined reference to `embree::BVHN<4>::clearBarrier(embree::NodeRefPtr<4>&)'
/usr/bin/ld: <artificial>:(.text+0x52a1d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans18.ltrans.o: in function `embree::avx2::BVHNMeshBuilderMorton<4, embree::TriangleMesh, embree::TriangleMv<4> >::build()':
<artificial>:(.text+0x5506f): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x55089): undefined reference to `embree::BVHN<4>::clearBarrier(embree::NodeRefPtr<4>&)'
/usr/bin/ld: <artificial>:(.text+0x5582d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans18.ltrans.o: in function `embree::avx2::BVHNMeshBuilderMorton<4, embree::TriangleMesh, embree::TriangleM<4> >::build()':
<artificial>:(.text+0x57e7f): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: <artificial>:(.text+0x57e99): undefined reference to `embree::BVHN<4>::clearBarrier(embree::NodeRefPtr<4>&)'
/usr/bin/ld: <artificial>:(.text+0x5863d): undefined reference to `embree::BVHN<4>::set(embree::NodeRefPtr<4>, embree::LBBox<embree::Vec3fa> const&, unsigned long)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans123.ltrans.o: in function `embree::BVH4Factory::BVH4Triangle4iMB(embree::Scene*, embree::BVHFactory::BuildVariant, embree::BVHFactory::IntersectVariant) [clone .constprop.0]':
<artificial>:(.text+0x14985): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans123.ltrans.o: in function `embree::BVH4Factory::BVH4Triangle4(embree::Scene*, embree::BVHFactory::BuildVariant, embree::BVHFactory::IntersectVariant) [clone .constprop.0]':
<artificial>:(.text+0x15412): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
/usr/bin/ld: /tmp/cc7rcj2R.ltrans123.ltrans.o: in function `embree::BVH4Factory::BVH4Triangle4v(embree::Scene*, embree::BVHFactory::BuildVariant, embree::BVHFactory::IntersectVariant) [clone .constprop.0]':
<artificial>:(.text+0x15717): undefined reference to `embree::BVHN<4>::BVHN(embree::PrimitiveType const&, embree::Scene*)'
collect2: error: ld returned 1 exit status
scons: *** [bin/godot.linuxbsd.template_release.x86_64.2D] Error 1
scons: building terminated because of errors.

Steps to reproduce

add -march=x86-64-v3 to CCFLAGS and LINKFLAGS

Minimal reproduction project (MRP)

N/A

[xana43]

Upon further testing, it seems like Embree is the only thing causing compilation issues when using -march, when I disable the embree module godot compiles just fine at this x86 version. Every other module works perfectly fine.

[MonterraByte]

Embree uses preprocessor defines (such as __AVX2__) to decide what features to use. By passing -march=x86-64-v3, AVX2 support is enabled, which makes the compiler set the corresponding defines, thus changing the behavior of the code.

The undefined reference to 'embree::avx2::... errors are due to Embree's AVX2 code making use of implementation code omitted from Godot's copy of the Embree library (specifically, the kernels/geometry/primitive8.cpp, kernels/bvh/bvh_intersector1_bvh8.cpp, kernels/bvh/bvh_intersector_hybrid4_bvh8.cpp, kernels/bvh/bvh_intersector_hybrid8_bvh4.cpp and kernels/bvh/bvh_intersector_hybrid8_bvh8.cpp files).

The undefined reference to 'embree::BVHN<4>::... errors are due to defining EMBREE_TARGET_SSE2 when SSE2 is not the target being compiled. Specifically, it seems to be due to this bit of code in kernels/bvh/bvh.cpp:

#if !defined(__AVX__) || !defined(EMBREE_TARGET_SSE2) && !defined(EMBREE_TARGET_SSE42) || defined(__aarch64__)
  template class BVHN<4>;
#endif

which causes BVHN<4> to not be defined if the compiler supports AVX and EMBREE_TARGET_SSE2 is defined.

---

By adding the missing files, and changing the define from EMBREE_TARGET_SSE2 to EMBREE_TARGET_AVX2 (or just EMBREE_TARGET_AVX), Embree will build with -march=x86-64-v3.

While adding the missing files would probably be OK for a regular Godot build (dead code elimination would probably negate the binary size impact of the added code), I'm not sure how we'd go about selecting the right EMBREE_TARGET_* define for the compiler flags used.

The proper solution would probably be to prevent the compiler flags from enabling new instruction sets, using -mno-avx and such. It would fix the issue, although Embree would still only be built with SSE2 support. To have Embree built with AVX/AVX2 support, we'd need to explicitly add it as a build option.