From 884e972c1ec3705e379a73d173daa68034019895 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 26 Jun 2026 22:09:14 +0000
Subject: [PATCH 1/3] Initial plan


From d44f32d8b4b0e0783053a08e1174c3608c9f0a3b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 26 Jun 2026 22:13:23 +0000
Subject: [PATCH 2/3] Fix macOS CI: set SDKROOT/CONDA_BUILD_SYSROOT for
 conda-forge cross-compiler

The conda-forge arm64-apple-darwin20.0.0-clang fails meson's C compiler
sanity check on newer Xcode versions (26.5+) because the compiled binary
is missing LC_LOAD_DYLIB for libSystem.dylib.

Fix: set SDKROOT, CONDA_BUILD_SYSROOT, and MACOSX_DEPLOYMENT_TARGET before
the build step so the conda-forge cross-compiler can find and link against
the correct macOS SDK.
---
 .github/workflows/smoke_test.yml | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/.github/workflows/smoke_test.yml b/.github/workflows/smoke_test.yml
index 8296ec734..a5711db9e 100644
--- a/.github/workflows/smoke_test.yml
+++ b/.github/workflows/smoke_test.yml
@@ -42,6 +42,17 @@ jobs:
           pixi-version: v0.39.5
           manifest-path: pixi/pixi.toml
 
+      # On macOS, the conda-forge cross-compiler (arm64-apple-darwin20.0.0-clang)
+      # requires SDKROOT/CONDA_BUILD_SYSROOT to link against libSystem.dylib.
+      # Without this, meson's C compiler sanity check fails on newer Xcode versions.
+      - name: Set macOS SDK paths
+        if: runner.os == 'macOS'
+        run: |
+          SDKROOT=$(xcrun --sdk macosx --show-sdk-path)
+          echo "SDKROOT=$SDKROOT" >> $GITHUB_ENV
+          echo "CONDA_BUILD_SYSROOT=$SDKROOT" >> $GITHUB_ENV
+          echo "MACOSX_DEPLOYMENT_TARGET=11.0" >> $GITHUB_ENV
+
       # run install to see if it works
       - name: Build
         # run: pixi run --manifest-path pixi/pixi.toml   -e ${{ matrix.env }} install${{ matrix.os.cmd_extra }}

From 178392bd9e8ad242c142474d63fc041360778704 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 26 Jun 2026 22:13:51 +0000
Subject: [PATCH 3/3] Add comment explaining MACOSX_DEPLOYMENT_TARGET=11.0
 choice

---
 .github/workflows/smoke_test.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/smoke_test.yml b/.github/workflows/smoke_test.yml
index a5711db9e..707696b3f 100644
--- a/.github/workflows/smoke_test.yml
+++ b/.github/workflows/smoke_test.yml
@@ -44,7 +44,9 @@ jobs:
 
       # On macOS, the conda-forge cross-compiler (arm64-apple-darwin20.0.0-clang)
       # requires SDKROOT/CONDA_BUILD_SYSROOT to link against libSystem.dylib.
-      # Without this, meson's C compiler sanity check fails on newer Xcode versions.
+      # Without this, meson's C compiler sanity check fails on newer Xcode versions
+      # (e.g. Xcode 26+) because dyld rejects executables missing LC_LOAD_DYLIB.
+      # MACOSX_DEPLOYMENT_TARGET=11.0 matches the compiler's darwin20 target triplet.
       - name: Set macOS SDK paths
         if: runner.os == 'macOS'
         run: |