Emscripten 3.1.45

[hoodmane]

• Update changelog

[hoodmane]

Building numcodecs failed:

clang: error: unsupported option '-mno-sse2' for target 'wasm32-unknown-emscripten'
clang: error: unsupported option '-mno-avx2' for target 'wasm32-unknown-emscripten'

[ryanking13]

It looks like previously llvm ignored those SIMD flags, but now it throws an error. In the build log of the main branch:

clang: warning: argument unused during compilation: '-mno-sse2' [-Wunused-command-line-argument]
clang: warning: argument unused during compilation: '-mno-avx2' [-Wunused-command-line-argument]

Those flags are added by DISABLE_NUMCODECS_SSE2, DISABLE_NUMCODECS_AVX2 env variables. So let's remove them and see what happens.

[hoodmane]

That fails too:

emcc: error: Passing any of -msse, -msse2, -msse3, -mssse3, -msse4.1, -msse4.2, 
-msse4, -mavx, -mfpu=neon flags also requires passing -msimd128 (or             
-mrelaxed-simd)! 

How about filtering -mno-sse2 in pywasmcross?

[ryanking13]

Yes, it looks like we need to filter out SIMD flags in pywasmcross, until we support SIMD.

How about filtering -mno-sse2 in pywasmcross?

-mno-sse2 and -mno-avx are removed, but other flags remain, so I guess we should filter out -msse, -msse2, -msse3, -mssse3, -msse4.1, -msse4.2, -msse4, -mavx.

[hoodmane]

It's really annoying how build-packages-no-numpy-dependents times out so often these days...

[ryanking13]

Indeed... I'll start working on #3827 again after the release so we don't have to build whole packages on every commit.