Question

I’m trying to compile unit test (boost) on Linux but compiler thows an error.
Could someone check my command?

g++ -o UTest ../UTest/UT1.cpp ../UTest/UT2.cpp -lboost_system -lboost_thread -lboost_unit_test_framework 

Error

/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'

I removed main() from g++ comand because it should not be used when boost unit test is used.

What’s wrong?

PS The project without unit tests (with main()) is compiled fine. Unit tests on Windows work fine also.

Update

The issue with main() is resolved. But a new one has born.

Both UT1.cpp and UT2.cpp has included UTCommon.h and now I have lots error like the following

Error

tmp2.cpp:(.text+0xd44a): multiple definition of `boost::unit_test::unit_test_log_t::operator<<(boost::unit_test::lazy_ostream const&)'
/tmp/cc0jw8uR.o:tmp.cpp:(.text+0xd44a): first defined here
/tmp/cctLn9QJ.o: In function `boost::test_tools::tt_detail::equal_impl(char const*, char const*)'

UTCommon.h

#ifndef UT_COMMON_H
#define UT_COMMON_H

#ifndef BOOST_TEST_MODULE
#define BOOST_TEST_MODULE UnitTest
#endif

#if defined (__GNUC__) && defined(__unix__)
    #include <boost/test/included/unit_test.hpp>
#elif defined (WIN32)
    #include <boost/test/unit_test.hpp>
#endif

#endif

Answer 1

Best create a separate .cpp file that includes the file boost/test/included/unit_test.hpp. This will include an pre-generated main() function in your code. You can then use the BOOST_AUTO_TEST_CASE macro for the actual tests (as many times as you like):

#define BOOST_TEST_DYN_LINK        // this is optional
#define BOOST_TEST_MODULE MyTest   // specify the name of your test module
#include <boost/test/included/unit_test.hpp>  // include this to get main()


BOOST_AUTO_TEST_CASE(my_test_1)    // specify a test case
{
  /* Test something... */
  const static auto expected = 12;
  auto actual = my_func();

  BOOST_CHECK(actual == expected);
}

Compile this .cpp file (add linker options as necessary for all the functions defined in your own code), and it will become an executable that performs all the tests and generates a report.