Bump cibuildwheel from 2.17.0 to 2.18.1, increase minimum macOS requirement to Catalina to ensure binary compatibility

.github/workflows/build_wheels.yml

@@ -128,19 +128,19 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install cibuildwheel
         # Nb. keep cibuildwheel version pin consistent with job below
-        run: pipx install cibuildwheel==2.17.0
+        run: pipx install cibuildwheel==2.18.1
       - id: set-matrix
         run: |
           echo "CI_ONLY" $CI_ONLY
           if [ "$CI_ONLY" == "true" ]; then
-            MATRIX="[{'only':'cp312-manylinux_x86_64','os':'ubuntu-20.04'},{'only':'cp312-win_amd64','os':'windows-2019'}, {'only':'cp312-macosx_x86_64','os':'macos-11'}, {'only':'cp312-macosx_arm64','os':'macos-14'}]"
+            MATRIX="[{'only':'cp312-manylinux_x86_64','os':'ubuntu-20.04'},{'only':'cp312-win_amd64','os':'windows-2019'}, {'only':'cp312-macosx_x86_64','os':'macos-12'}, {'only':'cp312-macosx_arm64','os':'macos-14'}]"
           else
             MATRIX=$(
               {
               cibuildwheel --print-build-identifiers --platform linux \
               | jq -nRc '{"only": inputs, "os": "ubuntu-20.04"}' \
               && cibuildwheel --print-build-identifiers --platform macos --archs x86_64 \
-              | jq -nRc '{"only": inputs, "os": "macos-11"}' \
+              | jq -nRc '{"only": inputs, "os": "macos-12"}' \
               && cibuildwheel --print-build-identifiers --platform macos --archs arm64 \
               | jq -nRc '{"only": inputs, "os": "macos-14"}' \
               && cibuildwheel --print-build-identifiers --platform windows \
@@ -180,7 +180,7 @@ jobs:
         with:
           platforms: all          
       - name: Build and test wheels
-        uses: pypa/cibuildwheel@v2.17.0
+        uses: pypa/cibuildwheel@v2.18.1
         env:
           # FIXME: only run the slow tests when doing regular pushes, or manual - not for PRs
           CIBW_TEST_COMMAND: "pytest -v {package}/tests ${{ (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && '--runslow' || '' }}"

pyproject.toml

@@ -46,24 +46,39 @@ before-all="yum install -y swig gsl-devel"
 # musl uses apk/apt
 select = "*musllinux*"
 before-all = "apk add swig gsl-dev"
+# restore musllinux_1_1 image for the time being (musllinux_1_2 segfaults)
+musllinux-x86_64-image="musllinux_1_1"
 
 [tool.cibuildwheel.macos]
-# do a per-build 'gsl' installation to force correct architecture when
+before-all = "brew install swig"
+# re-enable if we need to  do a per-build 'gsl' installation to force correct architecture when
 # cross-compiling (https://stackoverflow.com/a/75488269)
-before-all = "brew install swig gsl"
 # before-build = [
 #  "echo ARCHFLAGS = $ARCHFLAGS", # gets the arch at build-time
-#  "if [[ $ARCHFLAGS == *arm64 ]]; then brew fetch --force --bottle-tag=arm64_big_sur gsl; brew reinstall $(brew --cache --bottle-tag=arm64_big_sur gsl); else brew reinstall gsl; fi"
-# ]
-# note that SWIG is already present on runners, no 'brew' installation neeeded
-# support cross-compilation on Apple Silicon
+#  "if [[ $ARCHFLAGS == *arm64 ]]; then BOTTLE_TAG=arm64_big_sur gsl; else BOTTLE_TAG=x86_64_linux; fi",
+#  "echo BOTTLE_TAG = $BOTTLE_TAG",
+#]
 archs = ["arm64", "x86_64"]  # don't enable "universal2" binary
 
 [[tool.cibuildwheel.overrides]]
 select = "*-macosx_*"
 inherit.environment="append"
 environment = { CPATH="/opt/homebrew/include", LIBRARY_PATH="/opt/homebrew/lib" }
 
+[[tool.cibuildwheel.overrides]]
+select = "*-macosx_x86_64"
+inherit.environment="append"
+environment = { MACOSX_DEPLOYMENT_TARGET="10.15" } # 10.15 is Catalina the minimum version of gsl supported by 'brew' 
+inherit.before-all="append"
+# install the catalina version of `gsl` to match
+before-all = "brew fetch --force --bottle-tag=catalina gsl; brew reinstall $(brew --cache --bottle-tag=catalina gsl)"
+
+[[tool.cibuildwheel.overrides]]
+select = "*-macosx_arm64"
+inherit.before-all="append"
+# need to force the Big Sur (MacOS 11.0) version of `gsl` to match the wheel tag, otherwise it will attempt to install MacOS 14 version
+before-all = "brew fetch --force --bottle-tag=arm64_big_sur gsl; brew reinstall $(brew --cache --bottle-tag=arm64_big_sur gsl)"
+
 [tool.cibuildwheel.windows]
 # use nuget to install gsl on Windows, and manually supply paths
 before-all = "nuget install gsl-msvc14-x64 -Version 2.3.0.2779"