Add Makefile target for ease of running example(s)

Signed-off-by: Anjan Roy <hello@itzmeanjan.in>

Author: itzmeanjan

Makefile

@@ -24,6 +24,7 @@ BUILD_DIR := build
 
 include tests/test.mk
 include benchmarks/bench.mk
+include examples/example.mk
 
 $(SHA3_INC_DIR):
 	git submodule update --init sha3

examples/example.mk

@@ -0,0 +1,15 @@
+EXAMPLE_BUILD_DIR := $(BUILD_DIR)/example
+
+EXAMPLE_DIR := examples
+EXAMPLE_SOURCES := $(wildcard $(EXAMPLE_DIR)/*.cpp)
+EXAMPLE_HEADERS := $(wildcard $(EXAMPLE_DIR)/*.hpp)
+EXAMPLE_EXECS := $(addprefix $(EXAMPLE_BUILD_DIR)/, $(notdir $(EXAMPLE_SOURCES:.cpp=.exe)))
+
+$(EXAMPLE_BUILD_DIR):
+	mkdir -p $@
+
+$(EXAMPLE_BUILD_DIR)/%.exe: $(EXAMPLE_DIR)/%.cpp $(EXAMPLE_BUILD_DIR) $(SHA3_INC_DIR)
+	$(CXX) $(CXX_DEFS) $(CXX_FLAGS) $(WARN_FLAGS) $(RELEASE_FLAGS) $(I_FLAGS) $(DEP_IFLAGS) $< -o $@
+
+example: $(EXAMPLE_EXECS) ## Build and run example program, demonstrating usage of ML-DSA API
+	$(foreach exec,$^,./$(exec);)