mongodb-7_0: fix avxSupport (#346979)

  cctools,

  avxSupport ? stdenv.hostPlatform.avxSupport,

  nixosTests,

  lib,

}:

let

    # Fix building with python 3.12 since the imp module was removed

    ./mongodb-python312.patch

  ];

    # mongodb-7_0's mozjs uses avx2 instructions

    # https://github.com/GermanAizek/mongodb-without-avx/issues/16

  ] ++ lib.optionals (!avxSupport) [ ./mozjs-noavx.patch ];

  passthru.tests = {

    inherit (nixosTests) mongodb;

  };

--- a/src/third_party/mozjs/SConscript

+++ b/src/third_party/mozjs/SConscript

@@ -145,8 +145,7 @@ sources = [

 ]

 if env['TARGET_ARCH'] == 'x86_64' and not env.TargetOSIs('windows'):

-    env.Append(CCFLAGS=['-mavx2'])

-    sources.extend(["extract/mozglue/misc/SIMD_avx2.cpp", "extract/mozglue/misc/SSE.cpp"])

+    sources.extend(["extract/mozglue/misc/SSE.cpp"])

 if env.TargetOSIs('windows'):

     sources.extend([

diff --git a/src/third_party/mozjs/extract/mozglue/misc/SIMD.cpp b/src/third_party/mozjs/extract/mozglue/misc/SIMD.cpp

index 3893de57b32..4ea0a657fbb 100644

--- a/src/third_party/mozjs/extract/mozglue/misc/SIMD.cpp

+++ b/src/third_party/mozjs/extract/mozglue/misc/SIMD.cpp

@@ -448,7 +448,7 @@ const char* SIMD::memchr8SSE2(const char* ptr, char value, size_t length) {

 // assertion failure. Accordingly, we just don't allow that to happen. We

 // are not particularly concerned about ensuring that newer 32 bit processors

 // get access to the AVX2 functions exposed here.

-#  if defined(MOZILLA_MAY_SUPPORT_AVX2) && defined(__x86_64__)

+#  if 0

 bool SupportsAVX2() { return supports_avx2(); }