Gnulib module: iswblank
Portability problems fixed by Gnulib:
-D_GNU_SOURCE) on some platforms: glibc 2.8.
Portability problems not fixed by Gnulib:
wchar_tis a 16-bit type and therefore cannot accommodate all Unicode characters. However, the Gnulib function
c32isblank, provided by Gnulib module
c32isblank, operates on 32-bit wide characters and therefore does not have this limitation.