Re: [Boost.Test] duplicate symbol '_main' (manual test registration)

From: Andrew McFarlane (andrew.mcfarlane52_at_[hidden])
Date: 2020-02-29 06:45:58

Sorry, quick edit.

The code snippet above has a typo:
{ #include "A.h" } should be { #include "A_T.h" }

*- AJ*

On Fri, Feb 28, 2020 at 10:44 PM Andrew McFarlane <
andrew.mcfarlane52_at_[hidden]> wrote:

> Hi all,
>
> As the subject line suggests, I am attempting to manually employ a master
> test suite that registers several sub test suites.
>
> - Each subtest suite has its own header and translation unit.
>
> - Each header has a public "init_test_suite()" method and several private
> "test_case<number>()" methods, all of which are declared static. The public
> method creates a test suite, adds all the test cases for that translation
> unit, and adds the suite to the master test suite. This method is intended
> to be called from main.cpp.
>
> Here is a simplified version of my main.cpp:
>
> #define BOOST_TEST_DYN_LINK
> #define BOOST_TEST_NO_MAIN
> #include <boost/test/unit_test.hpp>
>
> #include "A.h"
> #include "B_T.h"
> #include "C_T.h"
>
>
> bool register_test_suites()
> {
> A_T::init_test_suite();
> B_T::init_test_suite();
> C_T::init_test_suite();
> return 0;
> }
>
> int main(int argc, char *argv[], char *envp[])
> {
> return boost::unit_test::unit_test_main(&register_test_suites, argc,
> argv);
> }
>
> Here's the issue. Despite the fact that I have defined BOOST_TEST_NO_MAIN,
> it appears that my compiler is still generating 2 objects files for the
> main executable entry:
>
> duplicate symbol 'register_test_suites()' in:
>
>     /var/folders/bc/v2yqpsf96kn31tx8ybvy9gyw0000gn/T/main-58c6b3.o
>
>     bin/main.o
>
> duplicate symbol '_main' in:
>
>     /var/folders/bc/v2yqpsf96kn31tx8ybvy9gyw0000gn/T/main-58c6b3.o
>
>     bin/main.o
>
> ld: 2 duplicate symbols for architecture x86_64
>
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> make: *** [execs/main] Error 1
>
> As you might be wondering, all of my test translation units define
> BOOST_TEST_DYN_LINK, and none of them define BOOST_TEST_MODULE, as the
> documentation suggests.
>
> I tried removing BOOST_TEST_NO_MAIN from main.cpp but that did not appear
> to do anything.
>
> I also tried removing the static and shared Boost.Unit lib files from my
> stage/lib directory and rebuilding only the shared version, and that did
> not work either.
>
> Also not that my g++ command does have the expected -L and -l flags for
> linking with Boost.Test:
>
> -L/usr/local/boost_1_72_0/stage/lib -lboost_unit_test_framework
>
> I am lost here. No idea why main() is being defined twice.
>
> Thanks in advance.
>
> - AJ
>