New MetadataAudioFile class (which FLACFile now derives from). Makefile update to build libraries. New workflow file for GitHub.

Author: EricOulashin

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI Build and Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-and-test:
+    name: Build and Test (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Install dependencies (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y g++ make libflac-dev
+
+      - name: Install dependencies (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install flac
+
+      - name: Build
+        working-directory: code
+        run: make

code/Makefile

@@ -1,10 +1,27 @@
-# This is a makefile that will build a command-line application for Linux
-# (and hopefully similar operating systems).
+# This is a makefile that will build a command-line application and library
+# files for Linux, macOS, BSD, and similar operating systems.
 # Requires libflac-dev (or equivalent) to be installed.
 
+# Detect the operating system
+OS := $(shell uname)
+
 CXX := g++
-CXXFLAGS := -std=c++17 -O2 -Wall -Wextra -fno-aggressive-loop-optimizations
 LDFLAGS := -lFLAC
+
+# Platform-specific settings
+# macOS (Darwin): g++ is actually clang, so avoid GCC-specific flags.
+# Dynamic library is .dylib on macOS, .so on Linux/BSD/etc.
+ifeq ($(OS),Darwin)
+	CXXFLAGS := -std=c++17 -O2 -Wall -Wextra -fPIC
+	DYNAMIC_LIB := libaudiomixer.dylib
+	DYNAMIC_LDFLAGS := -dynamiclib -install_name $(DYNAMIC_LIB)
+else
+	CXXFLAGS := -std=c++17 -O2 -Wall -Wextra -fPIC -fno-aggressive-loop-optimizations
+	DYNAMIC_LIB := libaudiomixer.so
+	DYNAMIC_LDFLAGS := -shared -Wl,-soname,$(DYNAMIC_LIB)
+endif
+
+STATIC_LIB := libaudiomixer.a
 AUDIO_MIXER_CMDLINE_APP := audioMixer
 
 SRC_DIR := ./common
@@ -16,21 +33,33 @@ SOURCES := \
  	$(SRC_DIR)/EOUtils.cpp \
  	$(SRC_DIR)/FLACFile.cpp \
  	$(SRC_DIR)/FLACFileInfo.cpp \
+ 	$(SRC_DIR)/MetadataAudioFile.cpp \
  	$(SRC_DIR)/utilFunctions.cpp \
  	$(SRC_DIR)/WAVFile.cpp \
  	$(SRC_DIR)/WAVFileInfo.cpp
 
 OBJECTS := $(SOURCES:.cpp=.o)
 
-.PHONY: all clean
+.PHONY: all libs clean
 
-all: $(AUDIO_MIXER_CMDLINE_APP)
+all: $(AUDIO_MIXER_CMDLINE_APP) libs
+
+libs: $(STATIC_LIB) $(DYNAMIC_LIB)
 
 $(AUDIO_MIXER_CMDLINE_APP): $(OBJECTS) $(SRC_DIR)/cmdLineApp.cpp
 	$(CXX) $(CXXFLAGS) -o $@ $(OBJECTS) $(SRC_DIR)/cmdLineApp.cpp $(LDFLAGS)
 
+# Static library
+$(STATIC_LIB): $(OBJECTS)
+	ar rvu $(STATIC_LIB) $(OBJECTS)
+	ranlib $(STATIC_LIB)
+
+# Dynamic/shared library
+$(DYNAMIC_LIB): $(OBJECTS)
+	$(CXX) $(DYNAMIC_LDFLAGS) -o $(DYNAMIC_LIB) $(OBJECTS) $(LDFLAGS)
+
 %.o: %.cpp %.h
 	$(CXX) $(CXXFLAGS) -c $< -o $@
 
 clean:
-	rm -f $(AUDIO_MIXER_CMDLINE_APP) $(OBJECTS)
+	rm -f $(AUDIO_MIXER_CMDLINE_APP) $(OBJECTS) $(STATIC_LIB) $(DYNAMIC_LIB)