From cfcea80d362f1f0143a713182aacb594de013592 Mon Sep 17 00:00:00 2001
From: forbes <zoe.forbes@kindred-systems.com>
Date: Mon, 26 Jan 2026 12:39:10 -0600
Subject: [PATCH] Use system GCC instead of conda Clang

The conda-forge Clang is built with newer CPU instructions that
cause illegal instruction errors on older CPUs. Override to use
system GCC and remove mold linker flags.
---
 .gitea/workflows/build.yml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index dcd31d8d9a..4af3e07de2 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -57,7 +57,14 @@ jobs:
           pixi run ccache -p
 
       - name: Configure (CMake)
-        run: pixi run configure-release
+        shell: bash
+        run: |
+          # Use system GCC instead of conda Clang to avoid illegal instruction errors
+          pixi run cmake --preset conda-linux-release \
+            -DCMAKE_C_COMPILER=gcc \
+            -DCMAKE_CXX_COMPILER=g++ \
+            -DCMAKE_EXE_LINKER_FLAGS="" \
+            -DCMAKE_SHARED_LINKER_FLAGS=""
 
       - name: Build
         run: pixi run cmake --build build/release -j16