Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtquick3d/files/qtquick3d-6.6.2-gcc14.patch

@@ -0,0 +1,23 @@
+Qt undefs __AVX__ and others[1] to prevent bundled embree from using
+AVX/SSE4.2 code paths and result in linking errors, but this appears
+insufficient with gcc14[2].
+
+Until Qt improves this, for simplicity pass -mno-* to bundled embree
+as a workaround which lets the compiler disable these instead and
+that includes other features which depend on these.
+
+(note that embree is only used on amd64 and aarch64)
+
+Ideal would be to unbundle this and let system embree use the full
+feature set, but there is no machinery to easily allow it.
+
+[1] https://github.com/qt/qtquick3d/commit/7980cfd0
+[2] https://bugs.gentoo.org/917407
+--- a/src/3rdparty/embree/CMakeLists.txt
++++ b/src/3rdparty/embree/CMakeLists.txt
+@@ -64,2 +64,5 @@
+ # Use SSE2 only, ignore AVX/SSE4.2 for now
++if (TEST_architecture_arch STREQUAL x86_64)
++    qt_internal_extend_target(BundledEmbree COMPILE_OPTIONS -mno-avx -mno-sse4.2)
++endif()
+ qt_internal_extend_target(BundledEmbree DEFINES

dev-qt/qtquick3d/files/qtquick3d-6.6.2-x32abi.patch

@@ -0,0 +1,12 @@
+https://bugs.gentoo.org/926094
+https://bugreports.qt.io/browse/QTBUG-122955
+
+https://bugs.gentoo.org/926093
+https://github.com/embree/embree/issues/477
+--- a/src/3rdparty/embree/common/sys/platform.h
++++ b/src/3rdparty/embree/common/sys/platform.h
+@@ -34,3 +34,3 @@
+ /* detect 64 bit platform */
+-#if defined(__X86_64__) || defined(__aarch64__)
++#if (defined(__X86_64__) || defined(__aarch64__)) && ! defined(__ILP32__)
+ #define __64BIT__

dev-qt/qtquick3d/files/qtquick3d-6.9.2-assimp6.patch

@@ -0,0 +1,15 @@
+Seems that the '5' enforces the major version and it refuses to find
+system's assimp-6.0.2 (which is perfectly usable given Qt 6.9.2 bundles
+that version without it).
+
+We don't package older ones, so drop the check as a quick workaround.
+
+https://bugreports.qt.io/browse/QTBUG-137996
+--- a/src/plugins/assetimporters/configure.cmake
++++ b/src/plugins/assetimporters/configure.cmake
+@@ -16 +16 @@
+-qt_find_package(WrapQuick3DAssimp 5.1.6 PROVIDED_TARGETS WrapQuick3DAssimp::WrapQuick3DAssimp MODULE_NAME assetimporters QMAKE_LIB quick3d_assimp)
++qt_find_package(WrapQuick3DAssimp PROVIDED_TARGETS WrapQuick3DAssimp::WrapQuick3DAssimp MODULE_NAME assetimporters QMAKE_LIB quick3d_assimp)
+@@ -38 +38 @@
+-                   PACKAGES PACKAGE WrapQuick3DAssimp 5.1.6)
++                   PACKAGES PACKAGE WrapQuick3DAssimp)