Am 04.05.2026 um 23:52 schrieb Jakob Bohm via Cygwin:
On 03/05/2026 18:14, Brian Inglis via Cygwin wrote:
On 2026-05-03 06:00, Thomas Wolff via Cygwin wrote:
Am 03.05.2026 um 12:58 schrieb Dimitry Andric:
On 3 May 2026, at 12:47, Thomas Wolff via Cygwin
<[email protected]> wrote:
Am 03.05.2026 um 07:35 schrieb ASSI via Cygwin:
Thomas Wolff via Cygwin writes:
Observed with gcc 16:
For a number of character ranges, mainly (but not only) from CJK
ranges, wcwidth incorrectly reports width 1 instead of 2, 0, or -1.
Test file attached.
Can you report this upstream, please?
I couldn't yet test it with gcc 16 on Linux as there is no Debian
package.
Did you test it?
It looks like BSD-based libc gives 1 for U+D7C6, U+D7CB and U+D7CB,
while glibc gives 0.
Thanks. Despite some differences, none of them gives the broken
results of gcc-16 on cygwin, so I wonder whether it makes sense to
report upstream at this time.
It appears that libiberty does not contain any mb/wc
macros/functions, , and only contains safe-ctype IS...
macros/functions with fixed ASCII characters.
Does gcc, like most GNU products, include some release of gnulib?
Could gnulib or gcc config detect some lack of support and "fix"
newlib-cygwin support of Unicode properties declared in
wchar.h/wctype.h, or used in i18n, libunistring, and Unicode string
functions, especially if doing any kind of cross-bootstrap?
https://www.gnu.org/software/gnulib/MODULES.html
I also note that w32api-headers/runtime are gcc runtime dependencies
and hope they are used only in COFF/PE-related generation?
Under Cygwin, does wcwidth() use Cygwin-provided table, derived either
from upstream Unicode data or from Windows OS APIs that use OS bundled
Unicode data?
Cygwin/newlib provides a wcwidth function that uses a table generated
from unicode.org data, but apparently gcc 16 does not (fully?) use that
function.
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