Re: Linking error ..

From:

"Alf P. Steinbach" <alfps@start.no>

Newsgroups:

comp.lang.c++

Date:

Sat, 02 Feb 2008 22:39:39 +0100

Message-ID:

<13q9oso19puu7f2@corp.supernews.com>

* michael.goossens@gmail.com:

Currently I get following errors during linking:

1>Linking...
1>Matrix4x4.obj : error LNK2019: unresolved external symbol "public:
__thiscall Reference<class Matrix4x4>::Reference<class
Matrix4x4>(class Matrix4x4 *)" (??0?
$Reference@VMatrix4x4@@@@QAE@PAVMatrix4x4@@@Z) referenced in function
"public: class Reference<class Matrix4x4> __thiscall
Matrix4x4::operator*(class Reference<class Matrix4x4> const &)const
" (??DMatrix4x4@@QBE?AV?$Reference@VMatrix4x4@@@@ABV1@@Z)
1>Matrix4x4.obj : error LNK2019: unresolved external symbol "public:
class Matrix4x4 const * __thiscall Reference<class
Matrix4x4>::operator->(void)const " (??C?
$Reference@VMatrix4x4@@@@QBEPBVMatrix4x4@@XZ) referenced in function
"public: class Reference<class Matrix4x4> __thiscall
Matrix4x4::operator*(class Reference<class Matrix4x4> const &)const
" (??DMatrix4x4@@QBE?AV?$Reference@VMatrix4x4@@@@ABV1@@Z)
1>C:\Users\Micha?l\Documents\Visual Studio 2005\Projects\RenderWoman
\Debug\RenderWoman.exe : fatal error LNK1120: 2 unresolved externals
1>Build log was saved at "file://c:\Users\Micha?l\Documents\Visual
Studio 2005\Projects\RenderWoman\RenderWoman\Debug\BuildLog.htm"
1>RenderWoman - 3 error(s), 0 warning(s)

I have no idea what they mean, anyone?

They mean you lack compiled definitions of those functions.

Might be the templates that I used, was my first time.

See FAQ item 35.12 "Why can't I separate the definition of my templates
class from it's declaration and put it inside a .cpp file?" e.g. at
<url:http://www.parashift.com/c++-faq-lite/templates.html#faq-35.12>.

Cheers, & hth.,

- Alf

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