[Bug fortran/38839] BIND(C): Allow non-digit/underscore/alphabetic binding names

[burnus at gcc dot gnu dot org]

------- Comment #4 from burnus at gcc dot gnu dot org  2009-12-10 19:52 -------
For "$" one should check whether it is allowed for the given target, cf.
DOLLARS_IN_IDENTIFIERS (-> gcc/c-opts.c and dollars_in_ident in libcpp/).

For UCN (universal-character name), the ASCII characters $, @ and ` are
allowed. Cf. C99 6.4.3 and libcpp _cpp_valid_ucn.

One could also think of supporting UCN with character kind=4 (cf. PR36275 and
PR 9449) - at least when -fextended-identifiers is specified - as vendor
extension. As gfortran uses libcpp and and has full support of wide chars, it
should not be difficult (but shall produce an error with -std=f2008).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38839