[SergioRZMasson]

Bumps bgfx.cmake from 6c55158 to
5c98749,
which brings in:

• BabylonJS/bgfx.cmake#135 — bx's SSE4.2
  minspec is now applied to every x86 target instead of only x86_64, and Apple universal
  builds scope it per slice with -Xarch_.
• BabylonJS/bgfx.cmake#136 — bgfx and
  bimg submodule updates.

Why

bx/include/bx/simd_t.h uses SSE4.1 intrinsics (_mm_round_ps, _mm_blendv_ps) whenever
BX_CPU_X86 && __SSE2__, so every x86 target needs the SSE4.2 minspec that bx's own
scripts/toolchain.lua sets. Two configurations were missing it:

• the x86_64 slice of Apple universal builds — CMAKE_SYSTEM_PROCESSOR names only one
  slice, so ios-cmake's SIMULATOR64COMBINED (which reports aarch64 while also building
  an x86_64 slice) compiled that slice without the flag;
• 32-bit x86 — the Android NDK sets CMAKE_SYSTEM_PROCESSOR to i686 for the x86 ABI,
  which the old x86_64-only guard did not match.

Both failed with:

simd128_sse.inl:296:10: error: '__builtin_ia32_roundps' needs target feature sse4.1
simd128_sse.inl:769:10: error: always_inline function '_mm_blendv_ps' requires target
                               feature 'sse4.1', but would be inlined into function
                               'simd128_selb' that is compiled without support for 'sse4.1'

Removed workaround

Dependencies/CMakeLists.txt carried a local -msse4.2 workaround. The minspec is now
applied PUBLIC on the bx target, and bgfx / bimg / bimg_decode / bimg_encode all
link bx PUBLIC, so it is redundant.

It was also narrower than the problem it was working around — NOT APPLE AND NOT ANDROID
plus an x86_64-only processor match meant it never covered the Apple universal or
Android x86 cases that were actually failing.

Verification

Reproduced and validated on a mirror of the NuGet packager pipeline (iOS
SIMULATOR64COMBINED / Debug, Xcode 26.0.1, macos-latest):

	before the bgfx.cmake fix	after
needs target feature sse4.1 errors	2	0
result	FAILED at bimg → image.o (x86_64 slice)	BUILD SUCCEEDED
static libs linked / files installed	12 / —	70 / 66

The bgfx.cmake change itself was verified across 25 platform configurations (macOS/iOS/watchOS
single and universal slices, Android x86/x86_64/armeabi-v7a/arm64-v8a, Linux
x86_64/i686/aarch64, MSVC x64/ARM64/Win32, clang-cl, Emscripten) — see
BabylonJS/bgfx.cmake#135 for the full table.

[Copilot]

Pull request overview

This PR updates the bgfx.cmake FetchContent pin to a newer upstream commit that fixes SSE4.2 minspec propagation for all x86 targets (including Apple universal slice scoping and Android x86), and removes the now-redundant local -msse4.2 workaround previously applied in this repo.

Changes:

• Bump bgfx.cmake to commit 5c98749de48e8609a62e5c1fd2cfffbbd970588e.
• Remove the local SSE4.2 compile-options workaround block from Dependencies/CMakeLists.txt.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
CMakeLists.txt	Updates the bgfx.cmake FetchContent GIT_TAG to the upstream commit that includes the SSE minspec fix and submodule updates.
Dependencies/CMakeLists.txt	Drops the repo-local -msse4.2 workaround since the updated bgfx.cmake is expected to propagate the required x86 minspec via bx.