Godot 3.2.4 not building on ARM64 Linux

[NicoZobernig]

Godot version:
Godot branch 3.2 - version 3.2.4 (?)

OS/device including version:
Nvidia Jetson AGX Xavier
JetPack 4.5 - Ubuntu 18.04
NVIDIA Tegra Xavier (nvgpu)/integrated
GL ES 3.0

Issue description:
build failing with error fatal error: xmmintrin.h: No such file or directory
xmmintrin.h does not seem to exist for ARM architectures ?

Steps to reproduce:
scons -j8 platform=linux target=release_debug or scons -j8 platform=linux target=release_debug use_llvm=yes on ARM

Godot 3.2.2 and 3.2.3 build successfully.

[Calinou]

This may be related to the new CPU lightmapper which integrates the OpenImageDenoise library (thirdparty/oidn).

However, prior to 3.2.4, many other libraries already included xmmintrin.h without trouble:

List of files where xmmintrin.h is included

❯ rg -i "xmmintrin"
thirdparty/squish/simd_sse.h
29:#include <xmmintrin.h>

thirdparty/opus/celt/kiss_fft.h
42:# include <xmmintrin.h>

thirdparty/opus/celt/float_cast.h
94:        #include <xmmintrin.h>

thirdparty/bullet/clew/clew.h
343:#include <xmmintrin.h>

thirdparty/oidn/common/platform.h
27:#include <xmmintrin.h>

thirdparty/opus/celt/x86/pitch_sse4_1.c
32:#include <xmmintrin.h>

thirdparty/opus/celt/x86/celt_lpc_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/celt/x86/pitch_sse2.c
32:#include <xmmintrin.h>

thirdparty/opus/celt/x86/pitch_sse.c
40:#include <xmmintrin.h>

thirdparty/opus/silk/x86/VAD_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/silk/x86/VQ_WMat_EC_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/silk/x86/NSQ_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/silk/x86/NSQ_del_dec_sse.c
32:#include <xmmintrin.h>

thirdparty/bullet/BulletCollision/Gimpact/gim_memory.h
39:#include <xmmintrin.h>  // for prefetch

thirdparty/opus/silk/fixed/x86/vector_ops_FIX_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/silk/fixed/x86/prefilter_FIX_sse.c
32:#include <xmmintrin.h>

thirdparty/opus/silk/fixed/x86/burg_modified_FIX_sse.c
32:#include <xmmintrin.h>

[ChristophHaag]

I found a workaround at #2671 (comment)

arch=arm64 selects a build configuration that works here:

scons arch=arm64 platform=x11 target=release_debug use_llvm=no -j4

would be nice if it would default to do the correct thing on arm.

[akien-mga]

Yeah the new denoiser and ray tracing libraries are not compatible with aarch64. There's a check in place that works for macOS, but not for Linux, I'll have to fix that (we currently don't use/define arch on Linux, so the check doesn't work to disable those features).

[Burnsedia]

I have arm build on my itch.io page

[akien-mga]

"Fixed" by #46345 (will still fail when cross-compiling, but passing arch=arm64 as suggested above will indeed work as a workaround).