Buid fix for Linux

Makefile

@@ -352,8 +352,8 @@ intercept:
 		$(ZT_INCLUDES) examples/intercept/intercept.cpp -D_GNU_SOURCE \
 		-shared -o $(BUILD)/intercept.so $< -ldl
 simple:
-	$(CXX) $(CXXFLAGS) $(SANFLAGS) $(LIBZT_INCLUDES) $(LIBZT_DEFS) examples/bindings/cpp/simple_client_server/client.cpp -o $(BUILD)/client -L$(BUILD) -lzt $(WINDEFS)
-	$(CXX) $(CXXFLAGS) $(SANFLAGS) $(LIBZT_INCLUDES) $(LIBZT_DEFS) examples/bindings/cpp/simple_client_server/server.cpp -o $(BUILD)/server -L$(BUILD) -lzt $(WINDEFS)
+	$(CXX) $(CXXFLAGS) $(SANFLAGS) $(LIBZT_INCLUDES) $(LIBZT_DEFS) examples/bindings/cpp/simple_client_server/client.cpp -o $(BUILD)/client -L$(BUILD) -lpthread -lzt $(WINDEFS)
+	$(CXX) $(CXXFLAGS) $(SANFLAGS) $(LIBZT_INCLUDES) $(LIBZT_DEFS) examples/bindings/cpp/simple_client_server/server.cpp -o $(BUILD)/server -L$(BUILD) -lpthread -lzt $(WINDEFS)
 dlltest:
 	$(CXX) $(CXXFLAGS)
 

ext/lwip/src/api/netdb.c

@@ -57,8 +57,7 @@ struct gethostbyname_r_helper {
 };
 
 /** h_errno is exported in netdb.h for access by applications. */
-//#if LWIP_DNS_API_DECLARE_H_ERRNO
-#ifndef h_errno
+#if LWIP_DNS_API_DECLARE_H_ERRNO
 int h_errno;
 #endif /* LWIP_DNS_API_DECLARE_H_ERRNO */
 

include/lwipopts.h

@@ -516,7 +516,7 @@ happening sooner than they should.
  * transport.
  */
 #define LWIP_DNS                        1
-#define LWIP_DNS_API_DECLARE_H_ERRNO    0
+#define LWIP_DNS_API_DECLARE_H_ERRNO    1
 
 /*------------------------------------------------------------------------------
 -------------------------------- UDP Options -----------------------------------

make-liblwip.mk

@@ -55,6 +55,7 @@ LWIPARCH=$(CONTRIBDIR)/ports/win32
 endif
 ifeq ($(OSTYPE),linux)
 LWIPARCH=$(CONTRIBDIR)/ports/unix
+CFLAGS+=-nostdlib
 endif
 ifeq ($(OSTYPE),darwin)
 LWIPARCH=$(CONTRIBDIR)/ports/unix
@@ -64,7 +65,7 @@ LWIPARCH=$(CONTRIBDIR)/ports/unix
 endif
 
 LWIPINCLUDES:=-I$(LWIPDIR)/include -I$(LWIPARCH) -I$(LWIPARCH)/include -I$(LWIPDIR) -I. -Iext -Iinclude
-CFLAGS=$(WINDEFS) -Wno-format -Wno-missing-prototypes -Wno-deprecated -O3 -g -Wall -fPIC $(LWIPINCLUDES)
+CFLAGS+=$(WINDEFS) -Wno-format -Wno-missing-prototypes -Wno-deprecated -O3 -g -Wall -fPIC $(LWIPINCLUDES)
 
 ifeq ($(NS_DEBUG),1)
 CFLAGS+=-DLWIP_DEBUG=1