kmx git

error: merge from glibc and with verror

* lib/error.c: Merge changes since 2018 from glibc.
----- The following changes are taken from glibc:
(__error_internal, __error_at_line_internal): New functions,
with most of the old error and error_at_line_internal but
with va_list and with a new trailing mode_args,
for wide character mode.
(error_tail): Add trailing arg.
(error_tail, __error_internal, __error_at_line_internal):
Redo _LIBC implementation with respect to cancelation.
[_LIBC]: Include <libc-lock.h>, not <bits/libc-lock.h>.
----- The following changes are specific to Gnulib:
(__error_internal, __error_at_line_internal, error_tail) [!_LIBC]:
Use macros to define away the new trailing arg, and to name
the internal functions to verror and verror_at_line.
(verror, verror_at_line) [!_LIBC]: Undef so that we omit
the __gl_error_call business when defining these functions.
* lib/error.in.h: Include stdarg.h.
(verror, verror_at_line): New decls and macros.
* m4/error_h.m4 ([gl_ERROR_H]): Always compile error.c if
the verror module is also present.
* modules/verror (Files, lib_SOURCES):
Remove lib/verror.h, lib/verror.c.
(Depends-on): Remove stdio, xvasprintf.
(configure.ac-early): Define gl_HAVE_MODULE_VERROR so that
the error module compiles error.c.  Not sure if this is the
standard way to do this, but it seems to work.
* modules/verror (Include), tests/test-verror.c:
Include error.h, not verror.h.
kc3-lang/gnulib/modules/verror

Commit

modules/verror
