global_object_glog_test

main.cpp

#include <glog/logging.h>

class Obj {
public:
  Obj()          { DLOG(INFO) << "Obj::Obj()";  }
  virtual ~Obj() { DLOG(INFO) << "Obj::~Obj()"; }
  void foo()     { DLOG(INFO) << "Obj::foo()";  }
} obj; // global instance(constructor is called before main entry)

int main() {
  DLOG(INFO) << "beg main";
  obj.foo();
  DLOG(INFO) << "end main";
}

Makefile

all:
	g++ -o main.o -c main.cpp
	g++ -o global_object_glog_test main.o -lglog -pthread
	
clean:
	rm -rf global_object_glog_test
	rm -rf *.o

result.txt

# ./global_object_glog_test 
Segmentation fault (core dumped)