diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..75cee28
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,50 @@
+T=lcurl
+
+#default installtion prefix
+PREFIX=/usr/local
+
+LUA_VERSION = $(shell pkg-config luajit --print-provides)
+
+ifeq ($(LUA_VERSION),)
+LUA_CFLAGS=$(shell pkg-config lua --cflags)
+LUA_LIBS=$(shell pkg-config lua --libs)
+else
+LUA_CFLAGS=$(shell pkg-config luajit --cflags)
+LUA_LIBS=$(shell pkg-config luajit --libs)
+endif
+
+
+CURL_CFLAGS=$(shell pkg-config libcurl --cflags)
+CURL_LIBS=$(shell pkg-config libcurl --libs)
+
+# System's libraries directory (where binary libraries are installed)
+LUA_LIBDIR= $(PREFIX)/lib/lua/5.1
+
+# OS dependent
+LIB_OPTION= -shared #for Linux
+
+#LIB_OPTION= -bundle -undefined dynamic_lookup #for MacOS X
+LIBNAME= $T.so.$V
+
+# Compilation directives
+WARN_MOST= -Wall -fPIC -W -Waggregate-return -Wcast-align -Wmissing-prototypes -Wnested-externs -Wshadow -Wwrite-strings -pedantic
+WARN= -Wall -fPIC -Wno-unused-value
+CFLAGS= $(WARN) -DPTHREADS $(LUA_CFLAGS) $(CURL_CFLAGS)
+CC= gcc -g -shared -fPIC $(CFLAGS)
+LIB_OPTION=$(LUA_LIBS) $(CURL_LIBS)
+
+SRCS=$(shell echo src/*.c)
+
+all: $T.so
+
+$T.so: $(SRCS)
+	MACOSX_DEPLOYMENT_TARGET="10.3"; export MACOSX_DEPLOYMENT_TARGET; $(CC) $(CFLAGS) $(LIB_OPTION) -o $T.so $(SRCS) -lrt -ldl
+
+install: all
+	mkdir -p $(LUA_LIBDIR)
+	cp $T.so $(LUA_LIBDIR)
+
+clean:
+	rm -f $T.so $(OBJS) 
+
+
diff --git a/src/lcerr_easy.h b/src/lcerr_easy.h
index ce4dc07..21da152 100644
--- a/src/lcerr_easy.h
+++ b/src/lcerr_easy.h
@@ -2,7 +2,9 @@ ERR_ENTRY ( OK                       )
 ERR_ENTRY ( UNSUPPORTED_PROTOCOL     )
 ERR_ENTRY ( FAILED_INIT              )
 ERR_ENTRY ( URL_MALFORMAT            )
+#if LCURL_CURL_VER_GE(7,21,5)
 ERR_ENTRY ( NOT_BUILT_IN             )
+#endif
 ERR_ENTRY ( COULDNT_RESOLVE_PROXY    )
 ERR_ENTRY ( COULDNT_RESOLVE_HOST     )
 ERR_ENTRY ( COULDNT_CONNECT          )
@@ -90,11 +92,19 @@ ERR_ENTRY ( SSL_SHUTDOWN_FAILED      )
 ERR_ENTRY ( AGAIN                    )
 ERR_ENTRY ( SSL_CRL_BADFILE          )
 ERR_ENTRY ( SSL_ISSUER_ERROR         )
+#if LCURL_CURL_VER_GE(7,20,0)
 ERR_ENTRY ( FTP_PRET_FAILED          )
+#endif
+#if LCURL_CURL_VER_GE(7,21,0)
+ERR_ENTRY ( FTP_BAD_FILE_LIST        )
+#endif
+#if LCURL_CURL_VER_GE(7,20,0)
 ERR_ENTRY ( RTSP_CSEQ_ERROR          )
 ERR_ENTRY ( RTSP_SESSION_ERROR       )
-ERR_ENTRY ( FTP_BAD_FILE_LIST        )
+#endif
+#if LCURL_CURL_VER_GE(7,21,0)
 ERR_ENTRY ( CHUNK_FAILED             )
+#endif
 #if LCURL_CURL_VER_GE(7,30,0)
 ERR_ENTRY ( NO_CONNECTION_AVAILABLE  )
 #endif
diff --git a/src/lcflags.h b/src/lcflags.h
index b69cea9..b21daab 100644
--- a/src/lcflags.h
+++ b/src/lcflags.h
@@ -96,20 +96,48 @@ FLG_ENTRY(PROTO_LDAPS                     )
 FLG_ENTRY(PROTO_DICT                      )
 FLG_ENTRY(PROTO_FILE                      )
 FLG_ENTRY(PROTO_TFTP                      )
+#ifdef CURLPROTO_IMAP
 FLG_ENTRY(PROTO_IMAP                      )
+#endif
+#ifdef CURLPROTO_IMAPS
 FLG_ENTRY(PROTO_IMAPS                     )
+#endif
+#ifdef CURLPROTO_POP3
 FLG_ENTRY(PROTO_POP3                      )
+#endif
+#ifdef CURLPROTO_POP3S
 FLG_ENTRY(PROTO_POP3S                     )
+#endif
+#ifdef CURLPROTO_SMTP
 FLG_ENTRY(PROTO_SMTP                      )
+#endif
+#ifdef CURLPROTO_SMTPS
 FLG_ENTRY(PROTO_SMTPS                     )
+#endif
+#ifdef CURLPROTO_RTSP
 FLG_ENTRY(PROTO_RTSP                      )
+#endif
+#ifdef CURLPROTO_RTMP
 FLG_ENTRY(PROTO_RTMP                      )
+#endif
+#ifdef CURLPROTO_RTMPT
 FLG_ENTRY(PROTO_RTMPT                     )
+#endif
+#ifdef CURLPROTO_RTMPE
 FLG_ENTRY(PROTO_RTMPE                     )
+#endif
+#ifdef CURLPROTO_RTMPTE
 FLG_ENTRY(PROTO_RTMPTE                    )
+#endif
+#ifdef CURLPROTO_RTMPS
 FLG_ENTRY(PROTO_RTMPS                     )
+#endif
+#ifdef CURLPROTO_RTMPTS
 FLG_ENTRY(PROTO_RTMPTS                    )
+#endif
+#ifdef CURLPROTO_GOPHER
 FLG_ENTRY(PROTO_GOPHER                    )
+#endif
 FLG_ENTRY(PROTO_ALL                       )
 
 FLG_ENTRY(PROXY_HTTP                      ) /* added in 7.10.0 */
diff --git a/src/lchttppost.h b/src/lchttppost.h
index 6039884..311ad35 100644
--- a/src/lchttppost.h
+++ b/src/lchttppost.h
@@ -2,6 +2,7 @@
 #define _LCHTTPPOST_H_
 
 #include "lcurl.h"
+#include <stdlib.h>
 
 typedef struct lcurl_hpost_tag{
   struct curl_httppost *post;
diff --git a/src/lcurl.c b/src/lcurl.c
index 7a9da3f..3fd457a 100644
--- a/src/lcurl.c
+++ b/src/lcurl.c
@@ -74,8 +74,12 @@ static int lcurl_version_info(lua_State *L){
     lua_pushliteral(L, "SSPI");         lua_pushboolean(L, data->features & CURL_VERSION_SSPI        ); lua_rawset(L, -3);
     lua_pushliteral(L, "CONV");         lua_pushboolean(L, data->features & CURL_VERSION_CONV        ); lua_rawset(L, -3);
     lua_pushliteral(L, "CURLDEBUG");    lua_pushboolean(L, data->features & CURL_VERSION_CURLDEBUG   ); lua_rawset(L, -3);
+#if LCURL_CURL_VER_GE(7,21,4)
     lua_pushliteral(L, "TLSAUTH_SRP");  lua_pushboolean(L, data->features & CURL_VERSION_TLSAUTH_SRP ); lua_rawset(L, -3);
+#endif
+#if LCURL_CURL_VER_GE(7,22,0)
     lua_pushliteral(L, "NTLM_WB");      lua_pushboolean(L, data->features & CURL_VERSION_NTLM_WB     ); lua_rawset(L, -3);
+#endif
 #ifdef CURL_VERSION_HTTP2
     lua_pushliteral(L, "HTTP2");        lua_pushboolean(L, data->features & CURL_VERSION_HTTP2       ); lua_rawset(L, -3);
 #endif