[PR] {bp-3684} audioutils/lame: pin the checkout and build its AVX-512 sources [nuttx-apps]

["jerpelea (via GitHub)" <gi...@apache.org>]

jerpelea opened a new pull request, #3775:
URL: https://github.com/apache/nuttx-apps/pull/3775

   ## Summary
   
   The bundled encoder was checked out from lame's trunk with no revision, so every build took whatever trunk happened to be at that moment.  lame's trunk grows vector tiers over time, and each one adds sources that the two build files have to name:  r6655 offered AVX2 to the vector routines on 2026-07-25, and r6718 and r6720 added an AVX-512 tier on 2026-07-30.  The AVX-512 sources were never listed, so sim:alsa stopped linking on x86 hosts:
   
     takehiro.c:332:    undefined reference to `quantize_lines_xrpow_avx512'
     takehiro.c:533:    undefined reference to `ix_max_avx512'
     takehiro.c:569:    undefined reference to `count_bit_esc_avx512'
     vbrquantize.c:261: undefined reference to `calc_sfb_noise_x34_avx512'
   
   Pin the checkout to r6720 through a LAME_VERSION variable, as the rest of apps/ pins its third-party sources, and list the three AVX-512 files that revision provides.  The pin is what keeps the two in step:  the source list is maintained by hand, so it can only be correct for a known revision.
   
   The checkout is also only performed when lame/configure is absent and is never updated afterwards, so before this an unpinned tree was frozen at whatever trunk was on the day it was first built.  Anyone who checked out before 2026-07-30 still links and cannot reproduce the failure, which is why this surfaced only in CI.
   
   Makefile named just vector/xmm_quantize_sub.c and none of the other vector sources, so a Make build on an x86 host fails the same way with a longer list of symbols, from SSE2 upwards.  CI builds sim:alsa through CMake only, so that half was latent rather than visible.  Both files now list the same nine sources under the same host condition.
   
   ## Impact
   
   RELEASE
   
   ## Testing
   
   CI


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Re: [PR] {bp-3684} audioutils/lame: pin the checkout and build its AVX-512 sources [nuttx-apps]

["acassis (via GitHub)" <gi...@apache.org>]

acassis merged PR #3775:
URL: https://github.com/apache/nuttx-apps/pull/3775


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