[ANN] libwebp 1.6.0 release candidate

maybe there's a problem with SDL2 + WEBP_JS config (on MacOS 15.5):

> cmake ../ -DWEBP_BUILD_WEBP_JS=ON

-- The C compiler identification is AppleClang 17.0.0.17000013

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Check for working C compiler: /usr/bin/cc - skipped

-- Detecting C compile features

-- Detecting C compile features - done

wasm2js does not support SIMD, disabling webp.js generation.

-- Performing Test HAVE_BUILTIN_BSWAP16

-- Performing Test HAVE_BUILTIN_BSWAP16 - Success

-- Performing Test HAVE_BUILTIN_BSWAP32

-- Performing Test HAVE_BUILTIN_BSWAP32 - Success

-- Performing Test HAVE_BUILTIN_BSWAP64

-- Performing Test HAVE_BUILTIN_BSWAP64 - Success

-- Found OpenGL: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/OpenGL.framework

-- Performing Test HAVE_MATH_LIBRARY

-- Performing Test HAVE_MATH_LIBRARY - Success

-- Looking for include file GLUT/glut.h

-- Looking for include file GLUT/glut.h - found

-- Looking for include file GL/glut.h

-- Looking for include file GL/glut.h - not found

-- Looking for include file OpenGL/glut.h

-- Looking for include file OpenGL/glut.h - not found

-- Looking for include file shlwapi.h

-- Looking for include file shlwapi.h - not found

-- Looking for include file unistd.h

-- Looking for include file unistd.h - found

-- Looking for include file wincodec.h

-- Looking for include file wincodec.h - not found

-- Looking for include file windows.h

-- Looking for include file windows.h - not found

-- Performing Test WEBP_HAVE_FLAG_AVX2

-- Performing Test WEBP_HAVE_FLAG_AVX2 - Failed

-- Performing Test WEBP_HAVE_FLAG_AVX2

-- Performing Test WEBP_HAVE_FLAG_AVX2 - Failed

-- Performing Test HAS_COMPILE_FLAG

-- Performing Test HAS_COMPILE_FLAG - Failed

-- Performing Test WEBP_HAVE_FLAG_SSE41

-- Performing Test WEBP_HAVE_FLAG_SSE41 - Failed

-- Performing Test WEBP_HAVE_FLAG_SSE41

-- Performing Test WEBP_HAVE_FLAG_SSE41 - Failed

-- Performing Test HAS_COMPILE_FLAG

-- Performing Test HAS_COMPILE_FLAG - Failed

-- Performing Test WEBP_HAVE_FLAG_SSE2

-- Performing Test WEBP_HAVE_FLAG_SSE2 - Failed

-- Performing Test WEBP_HAVE_FLAG_SSE2

-- Performing Test WEBP_HAVE_FLAG_SSE2 - Failed

-- Performing Test HAS_COMPILE_FLAG

-- Performing Test HAS_COMPILE_FLAG - Failed

-- Performing Test WEBP_HAVE_FLAG_MIPS32

-- Performing Test WEBP_HAVE_FLAG_MIPS32 - Failed

-- Performing Test WEBP_HAVE_FLAG_MIPS32

-- Performing Test WEBP_HAVE_FLAG_MIPS32 - Failed

-- Performing Test WEBP_HAVE_FLAG_MIPS_DSP_R2

-- Performing Test WEBP_HAVE_FLAG_MIPS_DSP_R2 - Failed

-- Performing Test WEBP_HAVE_FLAG_MIPS_DSP_R2

-- Performing Test WEBP_HAVE_FLAG_MIPS_DSP_R2 - Failed

-- Performing Test HAS_COMPILE_FLAG

-- Performing Test HAS_COMPILE_FLAG - Failed

-- Performing Test WEBP_HAVE_FLAG_NEON

-- Performing Test WEBP_HAVE_FLAG_NEON - Success

-- Performing Test WEBP_HAVE_FLAG_MSA

-- Performing Test WEBP_HAVE_FLAG_MSA - Failed

-- Performing Test WEBP_HAVE_FLAG_MSA

-- Performing Test WEBP_HAVE_FLAG_MSA - Failed

-- Performing Test HAS_COMPILE_FLAG

-- Performing Test HAS_COMPILE_FLAG - Failed

-- Configuring done (6.0s)

-- Generating done (0.1s)

-- Build files have been written to: libwebp-1.6.0-rc1/build

> make

[...]

[100%] Building C object CMakeFiles/webp_wasm.dir/extras/webp_to_sdl.c.o

clang: error: no such file or directory: 'SDL2::SDL2'

make[2]: *** [CMakeFiles/webp_wasm.dir/extras/webp_to_sdl.c.o] Error 1

make[1]: *** [CMakeFiles/webp_wasm.dir/all] Error 2

make: *** [all] Error 2

The release has been finalized. There were only a couple non-library changes since rc1:

https://chromium.googlesource.com/webm/libwebp/+log/v1.6.0-rc1..v1.6.0