Add macOS build and install support

2 files changed, 42 insertions, 15 deletions

diff --git a/Makefile b/Makefile
index eb44468..071f923 100644
--- a/Makefile
+++ b/Makefile
@@ -1,32 +1,44 @@
-CC             ?= cc
-INSTALL_PREFIX ?= /usr/
-LDCONFIG       := ldconfig
+CC      ?= cc
+UNAME_S := $(shell uname -s)
 
-AR      := ar
-CFLAGS  := -Wall -fPIC -I. -Isrc
-LDFLAGS := -shared -lpthread
+AR        := ar
+CFLAGS    := -Wall -fPIC -I. -Isrc
 BUILD_DIR ?= build
-OBJ_DIR := $(BUILD_DIR)/obj
+OBJ_DIR   := $(BUILD_DIR)/obj
+
+ifeq ($(UNAME_S),Darwin)
+INSTALL_PREFIX ?= /usr/local/
+SHARED_EXT     := dylib
+LDCONFIG       := true
+LDFLAGS        := -dynamiclib -lpthread -Wl,-install_name,$(INSTALL_PREFIX)lib/libbeaker.$(SHARED_EXT)
+else
+INSTALL_PREFIX ?= /usr/
+SHARED_EXT     := so
+LDCONFIG       := ldconfig
+LDFLAGS        := -shared -lpthread
+endif
 
 SRCS := $(wildcard src/*.c)
 OBJS := $(patsubst src/%.c,$(OBJ_DIR)/%.o,$(SRCS))
 
-LIB    := $(BUILD_DIR)/libbeaker
-HEADER := beaker.h
+LIB_BASE   := $(BUILD_DIR)/libbeaker
+STATIC_LIB := $(LIB_BASE).a
+SHARED_LIB := $(LIB_BASE).$(SHARED_EXT)
+HEADER     := beaker.h
 
 .PHONY: all clean install uninstall info
 
-all: $(LIB).so $(LIB).a
+all: $(SHARED_LIB) $(STATIC_LIB)
 
 $(OBJ_DIR):
 	@mkdir -p $(OBJ_DIR)
 
-$(LIB).a: $(OBJS)
+$(STATIC_LIB): $(OBJS)
 	@echo "Linking static library $@..."
 	$(AR) rcs $@ $^
 	@echo "Successfully built $@"
 
-$(LIB).so: $(OBJS)
+$(SHARED_LIB): $(OBJS)
 	@echo "Linking shared library $@..."
 	$(CC) $(LDFLAGS) $(OBJS) -o $@ -lm
 	@echo "Successfully built $@"
@@ -43,7 +55,10 @@ clean:
 install: all
 	@echo "Installing libraries to $(INSTALL_PREFIX)lib"
 	@mkdir -p $(INSTALL_PREFIX)lib
-	@cp $(LIB).so $(LIB).a $(INSTALL_PREFIX)lib/
+ifeq ($(UNAME_S),Darwin)
+	@rm -f $(INSTALL_PREFIX)lib/libbeaker.so
+endif
+	@cp $(SHARED_LIB) $(STATIC_LIB) $(INSTALL_PREFIX)lib/
 	@$(LDCONFIG) || true
 	@echo "Installing $(HEADER) to $(INSTALL_PREFIX)include"
 	@mkdir -p $(INSTALL_PREFIX)include
@@ -52,14 +67,18 @@ install: all
 
 uninstall:
 	@echo "Uninstalling from $(INSTALL_PREFIX)..."
-	@rm -f $(INSTALL_PREFIX)lib/libbeaker.so
+	@rm -f $(INSTALL_PREFIX)lib/libbeaker.$(SHARED_EXT)
 	@rm -f $(INSTALL_PREFIX)lib/libbeaker.a
+ifeq ($(UNAME_S),Darwin)
+	@rm -f $(INSTALL_PREFIX)lib/libbeaker.so
+endif
 	@rm -f $(INSTALL_PREFIX)include/$(HEADER)
 	@$(LDCONFIG) || true
 	@echo "Uninstallation complete."
 
 info:
-	@echo "Detected OS:      '$(OS)'"
+	@echo "Detected OS:      '$(UNAME_S)'"
 	@echo "Compiler:         $(CC)"
 	@echo "Install Prefix:   $(INSTALL_PREFIX)"
+	@echo "Shared Library:   $(SHARED_LIB)"
 	@echo "Source Files:     $(SRCS)"
diff --git a/README.md b/README.md
index 8b8190c..a345f42 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,14 @@ Look at the files in examples for usage
   $ cd beaker
   # make install
 ```
+
+On macOS the default install prefix is `/usr/local/`, because `/usr/lib` is protected by System Integrity Protection.
+The install step produces `libbeaker.dylib` and removes any stale `libbeaker.so` from older installs.
+You can always override the destination:
+
+```bash
+$ make install INSTALL_PREFIX=/some/prefix/
+```
     
 ## Roadmap