buck issue report

BUCK

prebuilt_cxx_library(
  name = 'test',
  exported_headers = ['test.h'],
  shared_lib = 'libtest.so',
  preferred_linkage = 'shared',
)

cxx_binary(
  name = 'main',
  srcs = ['main.cpp'],
  deps = [':test'],
)

main.cpp

#include "test.h"

#include <iostream>

int main()
{
  std::cout << test() << std::endl;
}

Makefile

libtest.so: test.h test.cpp
        c++ -shared test.cpp -olibtest.so

test.cpp

#include "test.h"

int test()
{
  return 42;
}

test.h

#pragma once

int test();