From 1382930021be5955cf683de753e933e59cfa75ed Mon Sep 17 00:00:00 2001
From: Cameron Reed <ccreed1219@gmail.com>
Date: Fri, 26 Aug 2022 20:04:16 -0600
Subject: [PATCH] Added option to toggle between shared and static library

---
 Makefile | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 012ada3..d56b992 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,7 @@
+TYPE = STATIC
+SHARED_TYPE = SHARED
+STATIC_TYPE = STATIC
+
 BUILD_DIR = bin
 SOURCE_DIR = Src
 HEADER_DIR = Inc
@@ -5,7 +9,11 @@ HEADER_INSTALL_DIR = /usr/local/include
 INSTALL_DIR = /usr/local/lib
 
 LIB_NAME = argParser
+ifeq ($(TYPE), $(SHARED_TYPE))
+LIB_FILE_NAME = lib$(LIB_NAME).so
+else
 LIB_FILE_NAME = lib$(LIB_NAME).a
+endif
 
 OPT = -O2
 
@@ -24,16 +32,44 @@ OBJECTS += $(addprefix $(BUILD_DIR)/, $(notdir $(CXX_SOURCES:.cpp=.o)))
 CFLAGS = $(OPT) $(INCS) -Wall
 CXXFLAGS = -std=c++17 $(OPT) $(INCS) -Wall
 
+ifeq ($(TYPE), $(SHARED_TYPE))
+CFLAGS += -fpic
+CXXFLAGS += -fpic
+
+TESTFLAGS = -Wl,-rpath=$(PWD)/$(BUILD_DIR)
+endif
+
 HEADERS = $(wildcard $(HEADER_DIR)/*.h)
 
 CP = cp
 MKDIR = mkdir -p
 ARFLAGS = rvc
+SED = sed -i -e
+CHMOD = chmod
+LDCONFIG = ldconfig
 
 all: $(BUILD_DIR)/$(LIB_FILE_NAME)
 
+ifneq ($(TYPE), $(SHARED_TYPE))
+shared: clean
+	@$(SED) "s/^TYPE = .*$$/TYPE = $(SHARED_TYPE)/" Makefile
+
+.PHONY: shared
+endif
+
+ifneq ($(TYPE), $(STATIC_TYPE))
+static: clean
+	@$(SED) "s/^TYPE = .*$$/TYPE = $(STATIC_TYPE)/" Makefile
+
+.PHONY: static
+endif
+
 $(BUILD_DIR)/$(LIB_FILE_NAME): $(OBJECTS)
+ifeq ($(TYPE), $(SHARED_TYPE))
+	$(CXX) $^ $(CXXFLAGS) -shared -o $@
+else
 	$(AR) $(ARFLAGS) $@ $^
+endif
 
 $(BUILD_DIR)/%.o: $(SOURCE_DIR)/%.c | $(BUILD_DIR)
 	$(CC) -c $< $(CFLAGS) -o $@
@@ -45,7 +81,7 @@ $(BUILD_DIR):
 	$(MKDIR) $@
 
 test: all
-	$(CXX) test.cpp $(CXXFLAGS) -l$(LIB_NAME) -L$(BUILD_DIR) -o $(BUILD_DIR)/test
+	$(CXX) test.cpp $(CXXFLAGS) -l$(LIB_NAME) -L$(BUILD_DIR) $(TESTFLAGS) -o $(BUILD_DIR)/test
 	-$(BUILD_DIR)/test
 
 test_installed:
@@ -55,12 +91,20 @@ test_installed:
 install: all
 	$(CP) $(BUILD_DIR)/$(LIB_FILE_NAME) $(INSTALL_DIR)
 	$(CP) $(HEADERS) $(HEADER_INSTALL_DIR)
+	@$(CHMOD) 0755 $(INSTALL_DIR)/$(LIB_FILE_NAME)
+ifeq ($(TYPE), $(SHARED_TYPE))
+	@$(LDCONFIG)
+endif
 
 uninstall:
 	$(RM) $(INSTALL_DIR)/$(LIB_FILE_NAME)
 	$(RM) $(addprefix $(HEADER_INSTALL_DIR)/, $(notdir $(HEADERS)))
+ifeq ($(TYPE), $(SHARED_TYPE))
+	@$(LDCONFIG)
+endif
 
 clean:
 	$(RM) -r $(BUILD_DIR)
 
 .PHONY: all test install uninstall clean
+