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.

--- a/modules/wctype-h
+++ b/modules/wctype-h
@@ -3,7 +3,6 @@
 
 Files:
 lib/wctype.in.h
-lib/iswblank.c
 m4/wctype_h.m4
 m4/wint_t.m4
 
@@ -28,6 +27,7 @@
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
 	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_WCTYPE_H''@|$(NEXT_WCTYPE_H)|g' \
+	      -e 's/@''GNULIB_ISWBLANK''@/$(GNULIB_ISWBLANK)/g' \
 	      -e 's/@''HAVE_ISWBLANK''@/$(HAVE_ISWBLANK)/g' \
 	      -e 's/@''HAVE_ISWCNTRL''@/$(HAVE_ISWCNTRL)/g' \
 	      -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \