Demonstrate http://stackoverflow.com/q/20568235/1468366

a.c

#include <stdio.h>
#include <dlfcn.h>
int main(int argc, char** argv) {
  void *libb, *libc, (*f)(void);
  if (argc == 1) {
    printf("Loading b.so\n");
    if (!(libb = dlopen("./b.so", RTLD_NOW))) {
      fprintf(stderr, "dlopen(b): %s\n", dlerror());
      return 1;
    }
  }
  else {
    printf("Not loading b.so\n");
  }
  printf("Loading c.so\n");
  if (!(libc = dlopen("./c.so", RTLD_NOW))) {
    fprintf(stderr, "dlopen(c): %s\n", dlerror());
    return 2;
  }
  printf("Looking up f\n");
  if (!(f = (void(*)(void)) dlsym(libc, "f"))) {
    fprintf(stderr, "dlsym(f): %s\n", dlerror());
    return 3;
  }
  printf("Calling f\n");
  f();
  printf("Returned successfully\n");
  return 0;
}

b.cc

extern "C" { void d() { } }

c.cc

#include <thread>
void t() { }
extern "C" {
  void f() {
    std::thread(t).join();
  }
}

Makefile

failrun: fixrun
	@echo ""
	./a

FINDLIBPTHREAD=ldd c.so | awk '/libpthread.so/{print $$3}' | head -n1

fixrun: suceedrun
	@echo ""
	LD_PRELOAD='$(shell $(FINDLIBPTHREAD))' ./a

suceedrun: a b.so c.so
	@echo ""
	./a skip-b

.PHONY: failrun fixrun suceedrun

a: a.c Makefile
	gcc -Wall -ggdb -O0 -ldl -o a a.c

b.so: b.cc Makefile
	g++ -std=c++11 -Wall -ggdb -O0 -fPIC -shared -o b.so b.cc

c.so: c.cc Makefile
	g++ -std=c++11 -Wall -ggdb -O0 -fPIC -shared -pthread -o c.so c.cc

output.txt

./a skip-b
Not loading b.so
Loading c.so
Looking up f
Calling f
Returned successfully

LD_PRELOAD='/lib64/libpthread.so.0' ./a
Loading b.so
Loading c.so
Looking up f
Calling f
Returned successfully

./a
terminate called after throwing an instance of 'std::system_error'
  what():  Enable multithreading to use std::thread: Operation not permitted
Loading b.so
Loading c.so
Looking up f
Calling f
Makefile:2: recipe for target 'failrun' failed
make: *** [failrun] Aborted