Use sse2neon.h for Linux ARM64

.github/workflows/ninja-ci.yml

@@ -11,6 +11,30 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: make check
       run: make check
+
+  build-aarch64:
+    name: Build on Linux ARM64
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout bwa
+      uses: actions/checkout@v4
+
+    - name: Build
+      uses: uraimo/run-on-arch-action@v2
+      with:
+        arch: aarch64
+        distro: ubuntu22.04
+        githubToken: ${{ github.token }}
+        dockerRunArgs: |
+          --volume "${PWD}:/NINJA"
+        install: |
+          apt-get update -q -y
+          apt-get install -q -y make gcc g++
+        run: |
+          cd /NINJA
+          make check
+

Makefile

@@ -7,7 +7,10 @@ OBJECTS := $(SOURCES:.cpp=.o)
 
 # The C++ compiler must support C++11
 CXX := g++
-CXXFLAGS := -std=gnu++11 -Wall -mssse3
+CXXFLAGS := -std=gnu++11 -Wall
+ifeq ($(shell uname -m),x86_64)
+  CXXFLAGS += -mssse3
+endif
 
 # TODO: build to a dist directory or similar
 # TODO: use separate release and debug build directories

NINJA/DistanceCalculator.hpp

@@ -5,10 +5,14 @@
 
 #include <cmath>
 #include <cfloat>
+#include <cstdint>
+#ifdef __x86_64__
 #include <xmmintrin.h>        /* SSE  */
 #include <emmintrin.h>        /* SSE2 */
 #include <tmmintrin.h>      /* SSE3 */
-#include <cstdint>
+#elif defined __ARM_NEON
+#include "sse2neon.h"
+#endif
 
 
 class DistanceCalculator {