[Issue 11439] New: Linker error while importing modules in unit test blocks

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=11439

           Summary: Linker error while importing modules in unit test
                    blocks
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: spam at kalekold.net


--- Comment #0 from Gary Willoughby <spam at kalekold.net> 2013-11-04 10:34:51 PST ---
The test case involves three files: test/methods.d, test/test1.d and
test/test2.d. Because this is describing a problem with importing the files
need to reside inside a directory, here i've called it 'test'.

Source code:

test/methods.d:

    module test.methods;

    import std.array;

    public bool nothing(int[] x)
    {
        return x.empty();
    }

test/test1.d:

    module test.test1;

    struct S
    {
        int x[];
    }

    unittest
    {
        import test.methods;
        import std.stdio;

        writeln("test1 unit test");

        S s;

        assert(s.x.nothing());
    }

test/test2.d:

    module test.test2;

    import test.test1;

    struct T
    {
        int x[];
    }

I compile the above sources like this:

    rdmd --force -de -debug -I~/<dir containing test dir> -m64 -main -property
-unittest -w methods.d
    rdmd --force -de -debug -I~/<dir containing test dir> -m64 -main -property
-unittest -w test1.d
    rdmd --force -de -debug -I~/<dir containing test dir> -m64 -main -property
-unittest -w test2.d

When i try and compile `test2.d` i get the following error:

Undefined symbols for architecture x86_64:
  "_D4test7methods12__ModuleInfoZ", referenced from:
      _D4test5test112__ModuleInfoZ in test2.o
  "_D4test7methods7nothingFAiZb", referenced from:
      _D4test5test114__unittestL8_1FZv in test2.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

If i add the following to the bottom of `test2.d` it compiles fine but it
shouldn't be needed:

    unittest
    {
        import test.methods;
    }

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