Add github workflow

.github/workflows/ci.yml

@@ -0,0 +1,64 @@
+# vi: set et ts=2 sw=2 :
+name: build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  linux:
+    strategy:
+      matrix:
+        os: [ ubuntu-16.04, ubuntu-18.04, ubuntu-20.04 ]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: install dependencies
+      run: |
+        sudo apt install \
+          libjson-c-dev \
+          cmake \
+          gcc \
+          git \
+          make \
+    - uses: actions/checkout@v2
+    - name: cmake
+      run: mkdir build && cd build && cmake ..
+    - name: make
+      run: make -C build
+
+  macos-catalina:
+    runs-on: macos-10.15
+
+    steps:
+    - name: install dependencies
+      run: brew install cmake json-c
+    - uses: actions/checkout@v2
+    - name: cmake
+      run: mkdir build && cd build && cmake ..
+    - name: make
+      run: make -C build
+
+  win-srv-2019:
+
+    runs-on: windows-2019
+
+    steps:
+    - name: install dependencies
+      run: |-
+        choco install cygwin -y
+        choco install cyg-get -y
+        # Line continuation in PowerShell is backtick. Weird as Windows.
+        cyg-get gcc-g++ `
+                cmake `
+                make `
+                libjson-c-devel `
+                dos2unix
+        echo "C:/tools/cygwin/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+        echo "C:/tools/cygwin/usr/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+    - uses: actions/checkout@v2
+    - name: cmake
+      run: bash -c "mkdir build && cd build && cmake .."
+    - name: make
+      run: make -C build

fru.c

@@ -22,8 +22,28 @@
 #include <unistd.h>
 #include <errno.h>
 
+#ifdef __APPLE__
+#include <libkern/OSByteOrder.h>
+
+#define htobe16(x) OSSwapHostToBigInt16(x)
+#define htole16(x) OSSwapHostToLittleInt16(x)
+#define be16toh(x) OSSwapBigToHostInt16(x)
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#define htobe32(x) OSSwapHostToBigInt32(x)
+#define htole32(x) OSSwapHostToLittleInt32(x)
+#define be32toh(x) OSSwapBigToHostInt32(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#define htobe64(x) OSSwapHostToBigInt64(x)
+#define htole64(x) OSSwapHostToLittleInt64(x)
+#define be64toh(x) OSSwapBigToHostInt64(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
+
+#else
 #define _BSD_SOURCE
 #include <endian.h>
+#endif
 
 #ifdef __STANDALONE__
 #include <stdio.h>