[Bug c++/45082] Static const signed int class member causes undefined symbol.

["rwitmer at xmission dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from rwitmer at xmission dot com  2010-07-27 15:27 -------
Thanks for all the great comments and insight.

I'm still confused as to why when the BUFF_SIZE was defined as:
static const   signed int BUFF_SIZE = 20;
it caused the error, but when it was defined as:
static const unsigned int BUFF_SIZE = 20;
it did not.

void funky(const int& in) is an example of a library call I had to use, I have
no control over the author's over zealousness on using a const int& parameter.

There were 2 things that solved the problem I was seeing:

1. Adding a const   signed int BUFF_SIZE; line to the .cpp file.  

I've seen lots of code where we define constants ala, static const int
BUFF_SIZE=20; in the .hpp file without any const int myclass::BUFF_SIZE; in the
.cpp files.  Is that wrong to exclude them, should we be including them in the
.cpp file?

2. Declaring the type during the call, ala, funky((int)myclass::BUFF_SIZE);

I'm not sure which is the better solution.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45082