From 4573fe69ed8aad3ef885be1abaa2f85a7f5a8186 Mon Sep 17 00:00:00 2001
From: Andrew Kane <andrew@ankane.org>
Date: Fri, 1 Mar 2024 00:09:25 -0800
Subject: [PATCH] Less warnings

---
 ext/faiss/extconf.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ext/faiss/extconf.rb b/ext/faiss/extconf.rb
index e2bf395..e4f9ab2 100644
--- a/ext/faiss/extconf.rb
+++ b/ext/faiss/extconf.rb
@@ -18,6 +18,10 @@
 numo = File.join(Gem.loaded_specs["numo-narray"].require_path, "numo")
 abort "Numo not found" unless find_header("numo/narray.h", numo)
 
+apple_clang = RbConfig::CONFIG["CC_VERSION_MESSAGE"] =~ /apple clang/i
+$CXXFLAGS << " -Xclang" if apple_clang
+$CXXFLAGS << " -fopenmp"
+
 # for https://bugs.ruby-lang.org/issues/19005
 $LDFLAGS += " -Wl,-undefined,dynamic_lookup" if RbConfig::CONFIG["host_os"] =~ /darwin/i