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Xcode 3.0 linking error
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Xcode 3.0 linking error


  • Subject: Xcode 3.0 linking error
  • From: Thomas Hauk <email@hidden>
  • Date: Thu, 6 Mar 2008 19:29:01 -0800

Given a TestLib (BSD Static Library) which exposes a static function that takes a vector reference as a parameter:

***TestLib.h
#include <vector>

namespace TestLib
{
	class Test
	{
		public:
			static void F(std::vector<int>& v);
	};
}
***TestLib.cpp
#include "TestLib.h"

namespace TestLib
{
	void Test::F(std::vector<int>& v)
	{
		v.push_back(1);
	}
}
***

And given TestApp (Carbon C++ Application) that includes TestLib.h and links statically to TestLib.a, building Debug gets the following error:

Undefined symbols:
"TestLib::Test::F(__gnu_debug_def::vector<int, std::allocator<int> >&)", referenced from:
_main in main.o
ld: symbol(s) not found


However... building in Release, does not get the linking error, and the following code runs fine:

***
int main(int argc, char* argv[])
{
	std::vector<int> v;
	TestLib::Test::F(v);
	assert(v[0] == 1);
***

Am I doing something wrong?

I distilled this simple example from a codebase I'm porting now from MSVC 7.1 to OS X 10.5. The code compiles & runs fine on Windows, for the record.

T


--
Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems.
--Jamie Zawinski, in comp.lang.emacs


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