New module 'iswblank'. * lib/wctype.in.h (iswblank): Don't declare if GNULIB_ISWBLANK is 0. * modules/iswblank: New file. * modules/wctype-h (Files): Remove lib/iswblank.c. (Makefile.am): Substitute GNULIB_ISWBLANK. * m4/iswblank.m4: New file, partially extracted from m4/wctype_h.m4. * m4/wctype_h.m4 (gl_WCTYPE_MODULE_INDICATOR): New macro. (gl_WCTYPE_H_DEFAULTS): New macro. (gl_WCTYPE_H): Require it. Remove iswblank related code. * modules/iswblank-tests: New file. * tests/test-iswblank.c: New file, extraced from tests/test-wctype-h.c. * tests/test-wctype-h.c (main): Remove iswblank tests. * tests/test-wctype-h-c++.cc: Guard the signature test of iswblank. * doc/posix-functions/iswblank.texi: Mention module 'iswblank' instead of 'wctype-h'. * NEWS: Mention the change. * modules/mbchar (Depends-on): Add iswblank.

Files:
tests/test-wcrtomb.sh
tests/test-wcrtomb.c
tests/signature.h
tests/macros.h
m4/locale-fr.m4
m4/locale-ja.m4
m4/locale-zh.m4
m4/codeset.m4

Depends-on:
btowc

configure.ac:
gt_LOCALE_FR
gt_LOCALE_FR_UTF8
gt_LOCALE_JA
gt_LOCALE_ZH_CN

Makefile.am:
TESTS += test-wcrtomb.sh
TESTS_ENVIRONMENT += \
  LOCALE_FR='@LOCALE_FR@' \
  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
  LOCALE_JA='@LOCALE_JA@' \
  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
check_PROGRAMS += test-wcrtomb