Use homebrew clang for packaging for macos

The default segfaults now for some reason

ConflictSet.cpp

@@ -2104,13 +2104,9 @@ bool scan16(const InternalVersionT *vs, const uint8_t *is, int begin, int end,
 }
 
 // Returns true if v[i] <= readVersion for all i such that begin <= i < end
-//
-// always_inline So that we can optimize when begin or end is a constant.
-// gcovr exclude annotation necessary because of always_inline?
 template <bool kAVX512>
-inline __attribute__((always_inline)) bool
-scan16(const InternalVersionT *vs, int begin, int end, // GCOVR_EXCL_LINE
-       InternalVersionT readVersion) {                 // GCOVR_EXCL_LINE
+bool scan16(const InternalVersionT *vs, int begin, int end,
+            InternalVersionT readVersion) {
   assert(0 <= begin && begin < 16);
   assert(0 <= end && end <= 16);
   assert(begin <= end);
@@ -2873,7 +2869,7 @@ bool checkRangeRead(Node *n, std::span<const uint8_t> begin,
 template __attribute__((target("avx512f"))) bool
 scan16<true>(const InternalVersionT *vs, const uint8_t *is, int begin, int end,
              InternalVersionT readVersion);
-template __attribute__((always_inline, target("avx512f"))) bool
+template __attribute__((target("avx512f"))) bool
 scan16<true>(const InternalVersionT *vs, int begin, int end,
              InternalVersionT readVersion);
 template __attribute__((target("avx512f"))) bool

package_macos.sh

@@ -8,7 +8,7 @@ SRC_DIR="${0%/*}"
 BUILD_ARM="$(mktemp -d -t conflict-set-arm)"
 BUILD_X86="$(mktemp -d -t conflict-set-x86)"
 
-cmake_args=(-DCMAKE_CXX_FLAGS=-DNVALGRIND -DCPACK_PACKAGING_INSTALL_PREFIX=/usr/local)
+cmake_args=(-DCMAKE_CXX_FLAGS=-DNVALGRIND -DCMAKE_CXX_COMPILER=/opt/homebrew/opt/llvm/bin/clang++ -DCPACK_PACKAGING_INSTALL_PREFIX=/usr/local)
 
 cmake -S"$SRC_DIR" -B"$BUILD_ARM" -DCMAKE_OSX_ARCHITECTURES=arm64 "${cmake_args[@]}"
 cmake --build "$BUILD_ARM" --target conflict-set --target conflict-set-static