Use xcode 15.4 and dynamic_list for macos-x86_64 build

Author: mattip

.github/workflows/posix.yml

@@ -28,8 +28,8 @@ jobs:
           - { os: ubuntu-latest, PLAT: x86_64, INTERFACE64: '0', MB_ML_VER: '2014', MB_ML_LIBC: manylinux}
           - { os: ubuntu-latest, PLAT: x86_64, INTERFACE64: '1', MB_ML_VER: '2014', MB_ML_LIBC: manylinux}
 
-          - { os: macos-15-intel, PLAT: x86_64, INTERFACE64: '0', MB_ML_LIBC: macosx}
-          - { os: macos-15-intel, PLAT: x86_64, INTERFACE64: '1', MB_ML_LIBC: macosx}
+          - { os: macos-14, PLAT: x86_64, INTERFACE64: '0', MB_ML_LIBC: macosx}
+          - { os: macos-14, PLAT: x86_64, INTERFACE64: '1', MB_ML_LIBC: macosx}
 
           - { os: macos-latest, PLAT: arm64, INTERFACE64: '0', MB_ML_LIBC: macosx}
           - { os: macos-latest, PLAT: arm64, INTERFACE64: '1', MB_ML_LIBC: macosx}
@@ -58,11 +58,18 @@ jobs:
         submodules: recursive
         fetch-depth: 0
 
-    - uses: maxim-lobanov/setup-xcode@v1.6.0
-      if: ${{ contains(matrix.os, 'macos') }}
+   - uses: maxim-lobanov/setup-xcode@v1.6.0
+      if: ${{ matrix.os == 'macos-latest' }}
       with:
         xcode-version: '16.0'
 
+   - uses: maxim-lobanov/setup-xcode@v1.6.0
+      if: ${{ matrix.os == 'macos-14' }}
+      with:
+        xcode-version: '15.4'
+
+
+
     - name: Print some Environment variable
       run: |
         echo "PLAT: ${PLAT}"

tools/build_steps.sh

@@ -161,6 +161,7 @@ EOF
             export DYLD_LIBRARY_PATH=/usr/local/lib:$DYLD_LIBRARY_PATH
             CFLAGS="$CFLAGS -arch x86_64"
             export SDKROOT=${SDKROOT:-$(xcrun --show-sdk-path)}
+            local dynamic_list="CORE2 NEHALEM SANDYBRIDGE HASWELL SKYLAKEX"
             ;;
         *-i686)
             local bitness=32