ci(macos pip): pin floor to 12.0 to fix ld64.lld version-skew warnings

.github/workflows/pip-build.yml

@@ -397,11 +397,10 @@ jobs:
       - name: Generate and build MRBind bindings
         env:
           PATH: ${{matrix.brewpath}}/opt/make/libexec/gnubin:${{matrix.brewpath}}/opt/grep/libexec/gnubin:${{env.PATH}}
-        # `MACOS_MIN_VER` picked arbitrarily to match what Apple Clang uses when building MeshLib.
-        # Not setting this or setting a different value cases a warning when linking the bindings, and you can get the correct (?) value from those warnings.
+        # Match the 12.0 floor in DefaultOptions.cmake (mrbind doesn't go through CMake).
         run: |
           make --version
-          make -f scripts/mrbind/generate.mk -B --trace FOR_WHEEL=1 MACOS_MIN_VER=12.7
+          make -f scripts/mrbind/generate.mk -B --trace FOR_WHEEL=1 MACOS_MIN_VER=12.0
 
       - name: Unit Tests
         run: build/Release/bin/MRTest

cmake/Modules/DefaultOptions.cmake

@@ -16,6 +16,10 @@ IF(MR_EMSCRIPTEN AND MR_EMSCRIPTEN_WASM64)
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s MEMORY64=1")
 ENDIF()
 
+IF(APPLE)
+  set(CMAKE_OSX_DEPLOYMENT_TARGET "12.0" CACHE STRING "Minimum macOS version")
+ENDIF()
+
 add_compile_definitions(MR_USE_CMAKE_CONFIGURE_FILE)
 
 # MSVC debug information format

scripts/install_brew_requirements.sh

@@ -8,10 +8,39 @@ if [ -n "$MESHLIB_EXTRA_BREW_REQUIREMENTS" ] ; then
   MESHLIB_BREW_REQUIREMENTS=$MESHLIB_BREW_REQUIREMENTS$'\n'$MESHLIB_EXTRA_BREW_REQUIREMENTS
 fi
 
+# Pin the libs that link into the pip wheel to monterey-tagged bottles so they
+# match CMAKE_OSX_DEPLOYMENT_TARGET=12.0 (default Sequoia bottles target 14).
+# brew install doesn't accept --bottle-tag, so we fetch the cross-tag bottle
+# into brew's cache and install from there.
+PINNED_FORMULAS="jsoncpp openvdb opencascade tbb"
+if [ "$(uname -m)" = "arm64" ]; then
+  BOTTLE_TAG="arm64_monterey"
+else
+  BOTTLE_TAG="monterey"
+fi
+export MACOSX_DEPLOYMENT_TARGET=12.0
+# Fail fast if either the fetch or the install breaks; without `set -e`
+# previous iterations silently fell through to default Sequoia bottles.
+set -e
+brew fetch --bottle-tag="$BOTTLE_TAG" $PINNED_FORMULAS
+for f in $PINNED_FORMULAS; do
+  CACHED=$(brew --cache --bottle-tag="$BOTTLE_TAG" "$f")
+  echo "Installing cross-tag bottle: $CACHED"
+  ls -la "$CACHED"
+  brew install --quiet "$CACHED"
+done
+set +e
+
 brew install --quiet $(echo "$MESHLIB_BREW_REQUIREMENTS" | tr '\n' ' ')
 
 brew install --quiet pybind11
 
+# Strip dylibs we'll bundle (brew keeps full symbol tables for symbolication).
+# Walk Cellar/ directly because $BREW_PREFIX/lib contains only symlinks into it.
+BREW_PREFIX=$(brew --prefix)
+find "$BREW_PREFIX/Cellar" -type f -name '*.dylib' \
+  -exec chmod u+w {} + -exec strip -x {} + 2>/dev/null || true
+
 # check and upgrade python3 pip
 python3.10 -m ensurepip --upgrade
 python3.10 -m pip install --upgrade pip

thirdparty/vcpkg/triplets/arm64-linux-meshlib.cmake

@@ -12,3 +12,6 @@ set(VCPKG_CMAKE_SYSTEM_NAME Linux)
 set(VCPKG_BUILD_TYPE release)
 
 set(VCPKG_FIXUP_ELF_RPATH ON)
+
+# Strip .symtab/.strtab/.debug_* on release link (~15 MB across the dep chain).
+set(VCPKG_LINKER_FLAGS_RELEASE "${VCPKG_LINKER_FLAGS_RELEASE} -Wl,-s")

thirdparty/vcpkg/triplets/x64-linux-meshlib.cmake

@@ -12,3 +12,6 @@ set(VCPKG_CMAKE_SYSTEM_NAME Linux)
 set(VCPKG_BUILD_TYPE release)
 
 set(VCPKG_FIXUP_ELF_RPATH ON)
+
+# Strip .symtab/.strtab/.debug_* on release link (~15 MB across the dep chain).
+set(VCPKG_LINKER_FLAGS_RELEASE "${VCPKG_LINKER_FLAGS_RELEASE} -Wl,-s")