Dave Korn wrote:

> First attempt (attached) didn't go so well.  When building libgcc2, I get
> an ICE in the preprocessor, here:

> As far as I can tell, CHAR16_TYPE is:
> 
> (gdb) x/s 0x1fdb0f6 0x1fdb0f6 <__FUNCTION__.59453+167>:      "unsigned
> short" (gdb)
> 
> Is this perhaps related to the way all the short, long and longlong types
> in cygwin-stdint.h omit "int"?

  Answering my own question: no, it's not.

  char16_type_node exists, and looks like a valid type declaration to me, but
for some reason identifier_global_value() on it returns NULL.

$1 = (union tree_node *) 0x7ff31ab0
$2 = {base = {code = IDENTIFIER_NODE, side_effects_flag = 0,
    constant_flag = 0, addressable_flag = 0, volatile_flag = 0,
    readonly_flag = 0, unsigned_flag = 0, asm_written_flag = 0,
    nowarning_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0,
    public_flag = 0, private_flag = 0, protected_flag = 0,
    deprecated_flag = 0, saturating_flag = 0, default_def_flag = 0,
    lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0,
    lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, visited = 0,
    spare = 0, ann = 0x0}, common = {base = {code = IDENTIFIER_NODE,
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 0,
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0,
      asm_written_flag = 0, nowarning_flag = 0, used_flag = 0,
      nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0,
      protected_flag = 0, deprecated_flag = 0, saturating_flag = 0,
      default_def_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0,
      lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0,
      lang_flag_6 = 0, visited = 0, spare = 0, ann = 0x0}, chain = 0x0,
    type = 0x0}, int_cst = {common = {base = {code = IDENTIFIER_NODE,
                              . . .
    imag = 0x12}, identifier = {common = {base = {code = IDENTIFIER_NODE,
        side_effects_flag = 0, constant_flag = 0, addressable_flag = 0,
        volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0,
        asm_written_flag = 0, nowarning_flag = 0, used_flag = 0,
        nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0,
        protected_flag = 0, deprecated_flag = 0, saturating_flag = 0,
        default_def_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0,
        lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0,
        lang_flag_6 = 0, visited = 0, spare = 0, ann = 0x0}, chain = 0x0,
      type = 0x0}, id = {str = 0x7ff00f20 "unsigned short int", len = 18,
      hash_value = 1006702630}}, decl_minimal = {common = {base = {

  Not sure yet what's wrong with it or why identifier_global_value is unhappy.

    cheers,
      DaveK

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