feature: support working on mac os (openresty#34)

Co-authored-by: zjc <[email protected]>

Author: zjcnaruto

Makefile

@@ -18,6 +18,11 @@ LDFLAGS := -shared
 # on Mac OS X, one should set instead:
 # LDFLAGS := -bundle -undefined dynamic_lookup
 
+ifeq ($(shell uname),Darwin)
+	LDFLAGS := -bundle -undefined dynamic_lookup
+	C_SO_NAME := librestychash.dylib
+endif
+
 MY_CFLAGS := $(CFLAGS) -DBUILDING_SO
 MY_LDFLAGS := $(LDFLAGS) -fvisibility=hidden
 

lib/resty/chash.lua

@@ -55,6 +55,12 @@ local function load_shared_lib(so_name)
 
     local cpath = package.cpath
 
+    local postfix = ".so"
+    if ffi.os == "OSX" then
+        postfix = ".dylib"
+    end
+    so_name = so_name .. postfix
+
     for k, _ in string_gmatch(cpath, "[^;]+") do
         local fpath = string_match(k, "(.*/)")
         fpath = fpath .. so_name
@@ -74,9 +80,9 @@ local _M = {}
 local mt = { __index = _M }
 
 
-local clib = load_shared_lib("librestychash.so")
+local clib = load_shared_lib("librestychash")
 if not clib then
-    error("can not load librestychash.so")
+    error("can not load librestychash")
 end
 
 local CONSISTENT_POINTS = 160   -- points per server