Concurrency

examples/advanced/Makefile

@@ -0,0 +1,71 @@
+# Advanced Makefile showcasing pattern rules, VPATH, conditionals,
+# functions, automatic variables, and target-specific variables.
+#
+# Usage: antelope -gnu           (builds "all")
+#        antelope -gnu DEBUG=1   (debug build)
+#        antelope -gnu check     (run the test target)
+#        antelope -gnu clean     (clean build artifacts)
+
+# ---- Project Configuration ----
+
+PROJECT   = myapp
+SRCDIR    = src
+BUILDDIR  = build
+VPATH     = $(SRCDIR)
+
+# ---- Conditional Configuration ----
+
+ifeq ($(DEBUG),1)
+    CFLAGS = -g -O0 -DDEBUG
+    BUILDDIR = build/debug
+else
+    CFLAGS = -O2 -DNDEBUG
+    BUILDDIR = build/release
+endif
+
+# ---- Auto-discovered sources ----
+
+SRCS := $(notdir $(wildcard $(SRCDIR)/*.c))
+OBJS := $(patsubst %.c,$(BUILDDIR)/%.o,$(SRCS))
+
+# ---- Targets ----
+
+.PHONY: all clean check
+
+all: $(BUILDDIR)/$(PROJECT)
+
+# Output directory creation (order-only prerequisite — timestamp doesn't
+# trigger rebuild, but the directory must exist before the recipe runs).
+$(BUILDDIR)/$(PROJECT): $(OBJS) | $(BUILDDIR)
+	$(CC) $(CFLAGS) -o $@ $^
+
+# Pattern rule: build .o from .c, placing output in BUILDDIR
+$(BUILDDIR)/%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+# Create the output directory
+$(BUILDDIR):
+	mkdir -p $@
+
+# ---- Per-target variables (release target gets extra optimization) ----
+
+$(BUILDDIR)/release/$(PROJECT): CFLAGS += -flto
+
+# ---- Utility targets ----
+
+check: $(BUILDDIR)/$(PROJECT)
+	@echo "Running tests..."
+	./$(BUILDDIR)/$(PROJECT) --test
+	@echo "All tests passed."
+
+clean:
+	rm -rf $(BUILDDIR)
+
+# ---- Informational ----
+
+info:
+	$(info Project:    $(PROJECT))
+	$(info Sources:    $(SRCS))
+	$(info Objects:    $(OBJS))
+	$(info CFLAGS:     $(CFLAGS))
+	$(info Build dir:  $(BUILDDIR))