std_cwctype.h: #undef possible function-like macro definitions of iswxxx functions...
* include/c/bits/std_cwctype.h: #undef possible function-like
macro definitions of iswxxx functions, which might be brought in
by <wctype.h>. Those macro definitions prevent build on some
linux-based systems.
* include/bits/std_complex.h (complex<>): Comment out friend
declarations of abs<> specializations.
(abs): Define primary template.
* src/complex.cc (abs): Comment out specialization definition.
From-SVN: r37157