Skip building x86_64 release binaries on M1 Macs

Author: TheBlueMatt

genbindings.sh

@@ -540,17 +540,20 @@ if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
 		LINK_ARG_FLAGS="$LINK_ARG_FLAGS -C link-arg="-isysroot$(xcrun --show-sdk-path)" -C link-arg=-mmacosx-version-min=10.9"
 		RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14 -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-mcpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin
 	fi
-	export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
-	# Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
-	cargo clean --release
-	CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="$RUSTFLAGS -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-march=sandybridge -C link-arg=-mcpu=sandybridge -C link-arg=-mtune=sandybridge" cargo build $CARGO_BUILD_ARGS -v --release
-
-	if [ "$2" = "true" ]; then
-		$CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 demo.cpp target/release/libldk.a -ldl
-		strip ./a.out
-		echo "C++ Bin size and runtime with cross-language LTO:"
-		ls -lha a.out
-		time ./a.out > /dev/null
+	# If we're on an M1 don't bother building X86 binaries
+	if [ "$HOST_PLATFORM" != "aarch64-apple-darwin" ]; then
+		export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
+		# Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
+		cargo clean --release
+		CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="$RUSTFLAGS -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-march=sandybridge -C link-arg=-mcpu=sandybridge -C link-arg=-mtune=sandybridge" cargo build $CARGO_BUILD_ARGS -v --release
+
+		if [ "$2" = "true" ]; then
+			$CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 demo.cpp target/release/libldk.a -ldl
+			strip ./a.out
+			echo "C++ Bin size and runtime with cross-language LTO:"
+			ls -lha a.out
+			time ./a.out > /dev/null
+		fi
 	fi
 else
 	if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then