[llvm-bugs] [Bug 43456] New: __locale calls isascii, but MSVC doesn't seem to provide it in ctype.h

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Sep 25 15:53:54 PDT 2019


            Bug ID: 43456
           Summary: __locale calls isascii, but MSVC doesn't seem to
                    provide it in ctype.h
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: rnk at google.com
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

If you compile a simple file that uses <iostream> on Windows and use libc++
headers, it works, but if you add -fno-ms-compatibility, you get errors like

In file included from t.cpp:2:
In file included from
In file included from
../../buildtools/third_party/libc++/trunk/include/__locale(636,19): error: use
of undeclared identifier 'isascii'; did you mean 'iswascii'?
            if (!(isascii(*__low) && (__tab_[static_cast<int>(*__low)] & __m)))
note: 'iswascii' declared here
_Check_return_ _ACRTIMP int __cdecl iswascii  (_In_ wint_t _C);

As a workaround, one can pass -D_CRT_DECLARE_NONSTDC_NAMES to the compiler to
get ctype.h to provide a definition of isascii. Ideally, libc++ would avoid
this out of the box.

See also issue 34330, which is the same thing but for newlib, which also
doesn't provide isascii out of the box.

You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20190925/43a780ee/attachment-0001.html>

More information about the llvm-bugs mailing list