* Makefile.in (VPATH): Add regex directory.

(NM): new variable.
(OBSOLETE_FUNCTIONS): Ditto.
(NEW_FUNCTIONS): Ditto.
(install-headers): Install regex.h.
(install-man): New target.
(install): Use new target.
(DLL_OFILES): Add v8_reg* stuff.
(new-cygwin1.dll): Eliminate stamp-cygwin-lib creation.
(libcygwin.a): Remove obsolete functions from import lib.  Add new functions.
* configure.in: Detect 'nm' tool.
* configure: Regenerate.
* cygwin.din: Export posix_reg* functions.  Eliminate export of v8 reg*
functions.  This is now handled in object files themselves.
* regex/*: New files.
* regexp/v8_*.c: New files, renamed from non v8_ equivalents.

winsup/cygwin/regex/cclass.h

@@ -0,0 +1,31 @@
+/* character-class table */
+static struct cclass {
+	const char *name;
+	const char *chars;
+	const char *multis;
+} cclasses[] = {
+	{"alnum",	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+0123456789",				""},
+	{"alpha",	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
+						""},
+	{"blank",	" \t",		""},
+	{"cntrl",	"\007\b\t\n\v\f\r\1\2\3\4\5\6\16\17\20\21\22\23\24\
+	\25\26\27\30\31\32\33\34\35\36\37\177",	""},
+	{"digit",	"0123456789",	""},
+	{"graph",	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+	0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
+						""},
+	{"lower",	"abcdefghijklmnopqrstuvwxyz",
+						""},
+	{"print",	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+	0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ",
+						""},
+	{"punct",	"!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
+						""},
+	{"space",	"\t\n\v\f\r ",	""},
+	{"upper",	"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
+						""},
+	{"xdigit",	"0123456789ABCDEFabcdef",
+						""},
+	{NULL,		0,		""}
+};