std::locale breakage on MacOS 10.6 with LANG=en_US.UTF-8

Question

I have a C++ application that I am porting to MacOSX (specifically, 10.6). The app makes heavy use of the C++ standard library and boost. I recently observed some breakage i

Answer 1

The _S_create_c_locale exception seems to indicate some sort of misconfiguration: check that whatever your LC_ALL or LANG environment variable is set to, exists in the output of locale -a.

$ env LC_ALL=xx_YY ./test
terminate called after throwing an instance of 'std::runtime_error'
  what():  locale::facet::_S_create_c_locale name not valid
Aborted
$ env LC_ALL=C ./test
$ echo $?
0

But since you're on OS X, I'm not really sure how locale information is supposed to be handled.