c++ - aws-sdk-cpp: unresolved symbols -

i trying build simple example using aws sdk cpp. stumbled on building step. linking libaws-cpp-sdk-s3.so library, supposed have symbols source file. linker cannot find couple of them. source file is:

#include <aws/core/aws.h> int main( int argc, char ** argv) {     aws::sdkoptions options;     aws::initapi(options);      {         // make sdk calls here.     }      aws::shutdownapi(options);     return 0; } 

by using makefile:

cc = g++ cflags = -g -c -wall -std=c++11 ldflags = -g executable = ex1 rm = rm -f  sources = main.cpp objs = $(sources:.cpp=.o)  all: $(executable)  $(executable): main.o -laws-cpp-sdk-s3     $(cc) $(ldflags) main.o -o $@  main.o: main.cpp     $(cc) $(cflags) $^ -o $@  .phony: clean clean:     $(rm) $(executable) $(objs) $(sources:.cpp=.d) 

when run make, got error. why? built

g++ -g main.o -o ex1 main.o: in function main': /home/username/workspace/ex1/src/main.cpp:6: undefined reference toaws::initapi(aws::sdkoptions const&)' /home/username/workspace/ex1/src/main.cpp:12: undefined reference `aws::shutdownapi(aws::sdkoptions const&)' collect2: error: ld returned 1 exit status makefile:13: recipe target 'ex1' failed make: *** [ex1] error 1

i don't see linking libaws-cpp-sdk-core

you need:

$(executable): main.o -laws-cpp-sdk-s3 -laws-cpp-sdk-core     $(cc) $(ldflags) main.o -o $@