CI Use macos-10.13 compatible libomp when building the wheels (#19064)

ogrisel · jeremiedbb · web-flow · commit fe52d1e87af8 · 2021-01-11T08:12:16.000-05:00
Co-authored-by: Jérémie du Boisberranger &lt;34657725+jeremiedbb@users.noreply.github.com&gt;
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
@@ -86,6 +86,7 @@ jobs:
                             OPENBLAS_NUM_THREADS=2
                             SKLEARN_SKIP_NETWORK_TESTS=1
                             SKLEARN_BUILD_PARALLEL=3
+                            MACOSX_DEPLOYMENT_TARGET=10.13
           CIBW_BUILD: cp${{ matrix.python }}-${{ matrix.platform_id }}
           CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: bash build_tools/github/repair_windows_wheels.sh {wheel} {dest_dir} ${{ matrix.bitness }}
           CIBW_BEFORE_TEST_WINDOWS: bash build_tools/github/build_minimal_windows_image.sh ${{ matrix.python }} ${{ matrix.bitness }}
diff --git a/build_tools/github/build_wheels.sh b/build_tools/github/build_wheels.sh
@@ -5,7 +5,15 @@ set -x
 
 # OpenMP is not present on macOS by default
 if [[ "$RUNNER_OS" == "macOS" ]]; then
-    brew install libomp
+    # Make sure to use a libomp version binary compatible with the oldest
+    # supported version of the macos SDK as libomp will be vendored into the
+    # scikit-learn wheels for macos. The list of bottles can be found at:
+    # https://formulae.brew.sh/api/formula/libomp.json. Currently, the oldest
+    # supported macos version is: High Sierra / 10.13. When upgrading this, be
+    # sure to update the MACOSX_DEPLOYMENT_TARGET environment variable in
+    # wheels.yml accordingly.
+    wget https://homebrew.bintray.com/bottles/libomp-11.0.0.high_sierra.bottle.tar.gz
+    brew install libomp-11.0.0.high_sierra.bottle.tar.gz
     export CC=/usr/bin/clang
     export CXX=/usr/bin/clang++
     export CPPFLAGS="$CPPFLAGS -Xpreprocessor -fopenmp"
