Multiply defined symbols error when using std::tr1::regex from VS 2008 SP1

[Michael_Wild]

Hi all

If I try to use std::tr1::regex in more than one compilation unit I get a linker error because the static member data std::tr1::_Regex_traits::_Names gets instantiated in each of the object files since the definition of the explicit specialization is in the header.

Strangely, this works when using the Microsoft compiler. Anybody got an idea how to resolve this issue?

Michael

PS: This is with

• Windows 7
• Visual Studio 2008 SP1
• Intel C++ Compiler 11.1.046

[Michael_Wild]

A simple example would be the following:

main.cpp:

[cpp]#include 

// This function is defined in foo.cpp and also
// uses std::tr1::regex
void foo();

int main(int argc, char* argv[])
{
	std::tr1::regex re("^Hello World!$", std::tr1::regex::extended);
	std::tr1::regex_match("Hello World!", re);
	foo();
	return 0;
}[/cpp]

foo.cpp:

[cpp]#include 

void foo()
{
	std::tr1::regex re("African");
	bool match = std::tr1::regex_search("European or African?", re);
}[/cpp]

[JenniferJ]

Yeh, I saw the issue too.

Thanks for reporting it and the testcase. I'll report it to the compiler engineering team. if there's any news, I'll let you know. At this moment, I don't know of any work-around.

Thanks again.
Jennifer

[Michael_Wild]

Thanks!

As a work-around (more like a cludge) I resorted to #include all the files that use into one single master-file instead of compiling them directly.

Michael

[JenniferJ]

Hello,
this issue has been fixed in our 12.0 compiler. the initial release should contain the fix.

thanks,
Jennifer