gcc 2.96 ld failed for bitset count()

[Allen]

I use std::bitset in a VxWorks project. The following is demo codes.

#include <bitset>

int main()
{
std::bitset<256> bs;
bs.count();
}

g++ -o test test.cpp

When linking, g++ tells error.

partialImage.o: In function `_Base_bitset<2, unsigned
long>::_M_do_count(void) const':
partialImage.o(.text+0x3e8fa): undefined reference to
`_Bit_count<true>::_S_bit_count'
partialImage.o(.text+0x3e90a): undefined reference to
`_Bit_count<true>::_S_bit_count'

VxWorks gcc version is 2.96. How to correct this error?
Thank you.

Allen

 

[Ian Collins]

I use std::bitset in a VxWorks project. The following is demo codes.

#include <bitset>

int main()
{
std::bitset<256> bs;
bs.count();
}


When linking, g++ tells error.

partialImage.o: In function `_Base_bitset<2, unsigned
long>::_M_do_count(void) const':
partialImage.o(.text+0x3e8fa): undefined reference to
`_Bit_count<true>::_S_bit_count'
partialImage.o(.text+0x3e90a): undefined reference to
`_Bit_count<true>::_S_bit_count'

VxWorks gcc version is 2.96. How to correct this error?
Thank you.

Looks like a tool chain bug, check with your vendor.

 

[Juha Nieminen]

VxWorks gcc version is 2.96.

Maybe try with a version of gcc which isn't like 10 years old?

 

[red floyd]

Maybe try with a version of gcc which isn't like 10 years old?

He can't. That's the version bundled with VxWorks 5.5. It's been
specifically tweaked to generate VxWorks compatible code. Yeah, he
*could*, in theory, get the source to VxWorks' gcc, and update a 3.x
or later gcc, but that's not his job. His job is to develop some sort
of embedded system.