Temporarily pin compilers on OSX CI.

Author: bluescarni

tools/gha_osx_heyoka_head.sh

@@ -11,7 +11,9 @@ wget https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge
 export deps_dir=$HOME/local
 export PATH="$HOME/miniconda/bin:$PATH"
 bash miniconda.sh -b -p $HOME/miniconda
-conda create -y -p $deps_dir python=3.11 c-compiler cxx-compiler git pybind11 'numpy<2' cmake llvmdev tbb-devel tbb astroquery libboost-devel sleef fmt skyfield spdlog sympy cloudpickle 'mppp=1.*'
+conda create -y -p $deps_dir python=3.11 c-compiler cxx-compiler git pybind11 'numpy<2' \
+    cmake llvmdev tbb-devel tbb astroquery libboost-devel sleef fmt skyfield \
+    spdlog sympy cloudpickle 'mppp=1.*' 'clang<19' 'clangxx<19'
 source activate $deps_dir
 
 # Checkout, build and install heyoka's HEAD.

tools/gha_osx_heyoka_head_static.sh

@@ -11,7 +11,9 @@ wget https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge
 export deps_dir=$HOME/local
 export PATH="$HOME/miniconda/bin:$PATH"
 bash miniconda.sh -b -p $HOME/miniconda
-conda create -y -p $deps_dir python=3.11 c-compiler cxx-compiler git pybind11 'numpy<2' cmake llvmdev tbb-devel tbb astroquery libboost-devel sleef fmt skyfield spdlog sympy cloudpickle 'mppp=1.*' numba
+conda create -y -p $deps_dir python=3.11 c-compiler cxx-compiler git pybind11 'numpy<2' \
+    cmake llvmdev tbb-devel tbb astroquery libboost-devel sleef fmt skyfield \
+    spdlog sympy cloudpickle 'mppp=1.*' numba 'clang<19' 'clangxx<19'
 source activate $deps_dir
 
 # Checkout, build and install heyoka's HEAD.