Makefile

# Makefile for atomic_store library

CC      ?= cc
CFLAGS  ?= -O2 -Wall -Wextra -std=c11
AR      ?= ar
ARFLAGS ?= rcs

UNAME_S := $(shell uname -s)

# Detect shared library extension and flags
ifeq ($(UNAME_S),Darwin)
    SO_EXT     = dylib
    SO_LDFLAGS = -dynamiclib
else
    SO_EXT     = so
    SO_LDFLAGS = -shared
endif

LIBNAME    = atomicstore
LIBSTATIC  = lib$(LIBNAME).a
LIBSHARED  = lib$(LIBNAME).$(SO_EXT)

SRCS       = atomic_store.c
OBJS       = $(SRCS:.c=.o)


.PHONY: all clean shared

# Default: build static lib 
all: $(LIBSTATIC)

shared: $(LIBSHARED)

# Static library
$(LIBSTATIC): $(OBJS)
	$(AR) $(ARFLAGS) $@ $^

$(LIBSHARED): $(OBJS)
	$(CC) $(SO_LDFLAGS) -o $@ $^

# Object files
%.o: %.c atomic_store.h
	$(CC) $(CFLAGS) -fPIC -c $< -o $@

clean:
	rm -f $(OBJS) $(LIBSTATIC) $(LIBSHARED) $(TEST_BIN)