Add support for weak dependencies:

A) use RPMTAG_SUGGESTS and RPMTAG_ENHANCES to store them.

   This is different to upstream, which uses RPMSENSE_MISSINGOK
   and RPMTAG_REQUIRES/RPMTAG_PROVIDES instead. I chose different
   tags because I wanted to be compatible. The point is that
   applications that don't know about the new MISSINGOK semantics
   will mis-interpret the provides/requires otherwise, which
   I deemed to risky.

B) use RPMSENSE_STRONG to support a "strong" version, "Recommends"
   instead of "Suggests" and "Supplements" instead of "Enhances".

Needs extcond.diff for query operations.

--- a/build/parsePreamble.c.orig	2011-01-25 13:52:28.000000000 +0000
+++ b/build/parsePreamble.c	2011-05-11 14:09:07.000000000 +0000
@@ -342,6 +342,8 @@ static struct tokenBits_s const installS
     { "verify",		RPMSENSE_SCRIPT_VERIFY },
     { "pretrans",	RPMSENSE_PRETRANS },
     { "posttrans",	RPMSENSE_POSTTRANS },
+    { "hint", 		RPMSENSE_MISSINGOK },
+    { "strong", 	RPMSENSE_STRONG },
     { NULL, 0 }
 };
 
@@ -816,6 +818,18 @@ static rpmRC handlePreambleTag(rpmSpec s
 	if (parseRCPOT(spec, pkg, field, tag, 0, tagflags))
 	    goto exit;
 	break;
+    case RPMTAG_SUGGESTSFLAGS:
+    case RPMTAG_ENHANCESFLAGS:
+    case RPMTAG_BUILDSUGGESTS:
+    case RPMTAG_BUILDENHANCES:
+	tagflags = RPMSENSE_MISSINGOK;
+	if (macro && (!strcmp(macro, "recommends") || !strcmp(macro, "buildrecommends")))
+	    tagflags |= RPMSENSE_STRONG;
+	if (macro && (!strcmp(macro, "supplements") || !strcmp(macro, "buildsupplements")))
+	    tagflags |= RPMSENSE_STRONG;
+	if ((rc = parseRCPOT(spec, pkg, field, tag, 0, tagflags)))
+	    return rc;
+	break;
     case RPMTAG_EXCLUDEARCH:
     case RPMTAG_EXCLUSIVEARCH:
     case RPMTAG_EXCLUDEOS:
@@ -924,6 +938,14 @@ static struct PreambleRec_s const preamb
     {RPMTAG_BUGURL,		0, 0, LEN_AND_STR("bugurl")},
     {RPMTAG_COLLECTIONS,	0, 0, LEN_AND_STR("collections")},
     {RPMTAG_ORDERFLAGS,		2, 0, LEN_AND_STR("orderwithrequires")},
+    {RPMTAG_SUGGESTSFLAGS,	0, 0, LEN_AND_STR("recommends")},
+    {RPMTAG_SUGGESTSFLAGS,	0, 0, LEN_AND_STR("suggests")},
+    {RPMTAG_ENHANCESFLAGS,	0, 0, LEN_AND_STR("supplements")},
+    {RPMTAG_ENHANCESFLAGS,	0, 0, LEN_AND_STR("enhances")},
+    {RPMTAG_BUILDSUGGESTS,	0, 0, LEN_AND_STR("buildrecommends")},
+    {RPMTAG_BUILDSUGGESTS,	0, 0, LEN_AND_STR("buildsuggests")},
+    {RPMTAG_BUILDENHANCES,	0, 0, LEN_AND_STR("buildsupplements")},
+    {RPMTAG_BUILDENHANCES,	0, 0, LEN_AND_STR("buildenhances")},
     {0, 0, 0, 0}
 };
 
diff -p -up ./build/rpmfc.c.orig ./build/rpmfc.c
--- a/build/parseReqs.c.orig	2010-12-13 14:01:56.000000000 +0000
+++ b/build/parseReqs.c	2011-05-11 14:16:43.000000000 +0000
@@ -95,6 +95,20 @@ rpmRC parseRCPOT(rpmSpec spec, Package p
 	nametag = RPMTAG_CONFLICTNAME;
 	h = spec->buildRestrictions;
 	break;
+    case RPMTAG_SUGGESTSFLAGS:
+	nametag = RPMTAG_SUGGESTSNAME;
+	break;
+    case RPMTAG_ENHANCESFLAGS:
+	nametag = RPMTAG_ENHANCESNAME;
+	break;
+    case RPMTAG_BUILDSUGGESTS:
+	nametag = RPMTAG_SUGGESTSNAME;
+	h = spec->buildRestrictions;
+	break;
+    case RPMTAG_BUILDENHANCES:
+	nametag = RPMTAG_ENHANCESNAME;
+	h = spec->buildRestrictions;
+	break;
     }
 
     for (r = field; *r != '\0'; r = re) {
diff -p -up ./configure.ac.orig ./configure.ac
--- a/build/reqprov.c.orig	2010-12-13 14:01:56.000000000 +0000
+++ b/build/reqprov.c	2011-05-11 14:15:02.000000000 +0000
@@ -75,6 +75,16 @@ int addReqProv(Header h, rpmTagVal tagN,
 	indextag = RPMTAG_TRIGGERINDEX;
 	extra = Flags & RPMSENSE_TRIGGER;
 	break;
+    case RPMTAG_SUGGESTSNAME:
+	versiontag = RPMTAG_SUGGESTSVERSION;
+	flagtag = RPMTAG_SUGGESTSFLAGS;
+	extra = Flags & _ALL_REQUIRES_MASK;
+	break;
+    case RPMTAG_ENHANCESNAME:
+	versiontag = RPMTAG_ENHANCESVERSION;
+	flagtag = RPMTAG_ENHANCESFLAGS;
+	extra = Flags & _ALL_REQUIRES_MASK;
+	break;
     case RPMTAG_REQUIRENAME:
     default:
 	tagN = RPMTAG_REQUIRENAME;
--- a/build/rpmfc.c.orig	2011-02-28 09:57:21.000000000 +0000
+++ b/build/rpmfc.c	2011-05-11 13:58:33.000000000 +0000
@@ -1075,6 +1075,12 @@ static struct DepMsg_s depMsgs[] = {
   { "Obsoletes",	{ "%{?__find_obsoletes}", NULL, NULL, NULL },
 	RPMTAG_OBSOLETENAME, RPMTAG_OBSOLETEVERSION, RPMTAG_OBSOLETEFLAGS,
 	0, -1 },
+  { "Enhances",		{ "%{?__find_enhances}", NULL, NULL, NULL },
+	RPMTAG_ENHANCESNAME, RPMTAG_ENHANCESVERSION, RPMTAG_ENHANCESFLAGS,
+	RPMSENSE_STRONG, RPMSENSE_STRONG },
+  { "Supplements",	{ "%{?__find_supplements}", NULL, NULL, NULL },
+	RPMTAG_ENHANCESNAME, RPMTAG_ENHANCESVERSION, RPMTAG_ENHANCESFLAGS,
+	RPMSENSE_STRONG, 0 },
   { NULL,		{ NULL, NULL, NULL, NULL },	0, 0, 0, 0, 0 }
 };
 
@@ -1166,6 +1166,14 @@ static rpmRC rpmfcGenerateDependsHelper(
 		continue;
 	    tagflags = RPMSENSE_FIND_REQUIRES;
 	    break;
+	case RPMTAG_ENHANCESFLAGS:
+	    if (!pkg->autoProv)
+		continue;
+	    failnonzero = 0;
+	    tagflags = RPMSENSE_FIND_REQUIRES | RPMSENSE_MISSINGOK;
+	    if (strcmp(dm->msg, "Supplements") == 0)
+		tagflags |= RPMSENSE_STRONG;
+	    break;
 	default:
 	    continue;
 	    break;
--- a/lib/formats.c.orig	2011-01-25 13:52:28.000000000 +0000
+++ b/lib/formats.c	2011-05-11 14:02:09.000000000 +0000
@@ -560,6 +560,23 @@ static char * depflagsFormat(rpmtd td, c
     return val;
 }
 
+static char * depflag_strongFormat(rpmtd td)
+{
+    char * val = NULL;
+
+    if (rpmtdClass(td) != RPM_NUMERIC_CLASS) {
+	val = xstrdup(_("(not a number)"));
+    } else {
+	uint64_t anint = rpmtdGetNumber(td);
+	char buf[10];
+	buf[0] = '\0';
+	if (anint & RPMSENSE_STRONG)
+	    strcat(buf, "strong");
+	val = xstrdup(buf);
+    }
+    return val;
+}
+
 /**
  * Return tag container array size.
  * @param td		tag data container
@@ -672,6 +690,7 @@ static const struct headerFormatFunc_s r
     { RPMTD_FORMAT_VFLAGS,	"vflags",	vflagsFormat },
     { RPMTD_FORMAT_EXPAND,	"expand",	expandFormat },
     { RPMTD_FORMAT_FSTATUS,	"fstatus",	fstatusFormat },
+    { RPMTD_FORMAT_DEPFLAG_STRONG,	"depflag_strong",	depflag_strongFormat },
     { -1,			NULL, 		NULL }
 };
 
--- a/lib/rpmds.c.orig	2011-02-15 13:04:04.000000000 +0000
+++ b/lib/rpmds.c	2011-05-11 13:58:33.000000000 +0000
@@ -69,6 +69,10 @@ static int dsType(rpmTagVal tag,
 	t = "Trigger";
 	evr = RPMTAG_TRIGGERVERSION;
 	f = RPMTAG_TRIGGERFLAGS;
+    } else if (tag == RPMTAG_ENHANCESNAME) {
+	t = "Enhances";
+	evr = RPMTAG_ENHANCESVERSION;
+	f = RPMTAG_ENHANCESFLAGS;
     } else {
 	rc = 1;
     } 
--- a/lib/rpmtag.h.orig	2010-12-13 14:01:56.000000000 +0000
+++ b/lib/rpmtag.h	2011-05-11 13:58:33.000000000 +0000
@@ -217,14 +217,14 @@ typedef enum rpmTag_e {
     RPMTAG_PRETRANSPROG		= 1153,	/* s[] */
     RPMTAG_POSTTRANSPROG	= 1154,	/* s[] */
     RPMTAG_DISTTAG		= 1155,	/* s */
-    RPMTAG_SUGGESTSNAME		= 1156,	/* s[] extension (unimplemented) */
-#define	RPMTAG_SUGGESTS RPMTAG_SUGGESTSNAME	/* s[] (unimplemented) */
-    RPMTAG_SUGGESTSVERSION	= 1157,	/* s[] extension (unimplemented) */
-    RPMTAG_SUGGESTSFLAGS	= 1158,	/* i[] extension (unimplemented) */
-    RPMTAG_ENHANCESNAME		= 1159,	/* s[] extension placeholder (unimplemented) */
-#define	RPMTAG_ENHANCES RPMTAG_ENHANCESNAME	/* s[] (unimplemented) */
-    RPMTAG_ENHANCESVERSION	= 1160,	/* s[] extension placeholder (unimplemented) */
-    RPMTAG_ENHANCESFLAGS	= 1161,	/* i[] extension placeholder (unimplemented) */
+    RPMTAG_SUGGESTSNAME		= 1156,	/* s[] extension */
+#define	RPMTAG_SUGGESTS RPMTAG_SUGGESTSNAME	/* s[] */
+    RPMTAG_SUGGESTSVERSION	= 1157,	/* s[] extension */
+    RPMTAG_SUGGESTSFLAGS	= 1158,	/* i[] extension */
+    RPMTAG_ENHANCESNAME		= 1159,	/* s[] extension placeholder */
+#define	RPMTAG_ENHANCES RPMTAG_ENHANCESNAME	/* s[] */
+    RPMTAG_ENHANCESVERSION	= 1160,	/* s[] extension placeholder */
+    RPMTAG_ENHANCESFLAGS	= 1161,	/* i[] extension placeholder */
     RPMTAG_PRIORITY		= 1162, /* i[] extension placeholder (unimplemented) */
     RPMTAG_CVSID		= 1163, /* s (unimplemented) */
 #define	RPMTAG_SVNID	RPMTAG_CVSID	/* s (unimplemented) */
diff -p -up ./lib/rpmtd.h.orig ./lib/rpmtd.h
--- a/lib/rpmtd.h.orig	2010-12-03 12:11:57.000000000 +0000
+++ b/lib/rpmtd.h	2011-05-11 14:00:06.000000000 +0000
@@ -220,6 +220,7 @@ typedef enum rpmtdFormats_e {
     RPMTD_FORMAT_VFLAGS		= 17,	/* file verify flags (int types) */
     RPMTD_FORMAT_EXPAND		= 18,	/* macro expansion (string types) */
     RPMTD_FORMAT_FSTATUS	= 19,	/* file verify status (int types) */
+    RPMTD_FORMAT_DEPFLAG_STRONG	= 20,	/* strong dependency (int types) */
 } rpmtdFormats;
 
 /** \ingroup rpmtd
--- a/python/rpmmodule.c.orig	2010-12-03 12:11:57.000000000 +0000
+++ b/python/rpmmodule.c	2011-05-11 14:19:37.000000000 +0000
@@ -376,6 +376,7 @@ static int initModule(PyObject *m)
     REGISTER_ENUM(RPMSENSE_RPMLIB);
     REGISTER_ENUM(RPMSENSE_TRIGGERPREIN);
     REGISTER_ENUM(RPMSENSE_KEYRING);
+    REGISTER_ENUM(RPMSENSE_STRONG);
     REGISTER_ENUM(RPMSENSE_CONFIG);
 
     REGISTER_ENUM(RPMTRANS_FLAG_TEST);
--- a/rpmpopt.in.orig	2011-01-11 07:04:51.000000000 +0000
+++ b/rpmpopt.in	2011-05-11 14:18:47.000000000 +0000
@@ -65,6 +65,22 @@ rpm	alias --requires	--qf \
 	--POPTdesc=$"list capabilities required by package(s)"
 rpm	alias -R --requires
 
+rpm    alias --suggests        --qf \
+  "[%|SUGGESTSFLAGS:depflag_strong?{}:{%{SUGGESTSNAME} %{SUGGESTSFLAGS:depflags} %{SUGGESTSVERSION}\n}|]" \
+	--POPTdesc=$"list capabilities this package suggests"
+
+rpm    alias --recommends      --qf \
+  "[%|SUGGESTSFLAGS:depflag_strong?{%{SUGGESTSNAME} %{SUGGESTSFLAGS:depflags} %{SUGGESTSVERSION}\n}|]" \
+	--POPTdesc=$"list capabilities this package recommends"
+
+rpm    alias --enhances        --qf \
+  "[%|ENHANCESFLAGS:depflag_strong?{}:{%{ENHANCESNAME} %{ENHANCESFLAGS:depflags} %{ENHANCESVERSION}\n}|]" \
+	--POPTdesc=$"list capabilities this package enhances"
+
+rpm    alias --supplements     --qf \
+  "[%|ENHANCESFLAGS:depflag_strong?{%{ENHANCESNAME} %{ENHANCESFLAGS:depflags} %{ENHANCESVERSION}\n}|]" \
+	--POPTdesc=$"list capabilities this package supplements"
+
 rpm	alias --info --qf '\
 Name        : %{NAME}\n\
 %|EPOCH?{Epoch       : %{EPOCH}\n}|\

diff --git a/lib/rpmds.h b/lib/rpmds.h
index bf3ee2c..66bedd2 100644
--- a/lib/rpmds.h
+++ b/lib/rpmds.h
@@ -48,7 +48,7 @@ enum rpmsenseFlags_e {
     RPMSENSE_RPMLIB = (1 << 24),	/*!< rpmlib(feature) dependency. */
     RPMSENSE_TRIGGERPREIN = (1 << 25),	/*!< %triggerprein dependency. */
     RPMSENSE_KEYRING	= (1 << 26),
-    /* bit 27 unused */
+    RPMSENSE_STRONG     = (1 << 27),
     RPMSENSE_CONFIG	= (1 << 28)
 };
 
@@ -68,6 +68,7 @@ typedef rpmFlags rpmsenseFlags;
     RPMSENSE_SCRIPT_POSTUN | \
     RPMSENSE_SCRIPT_VERIFY | \
     RPMSENSE_FIND_REQUIRES | \
+    RPMSENSE_STRONG | \
     RPMSENSE_RPMLIB | \
     RPMSENSE_KEYRING | \
     RPMSENSE_PRETRANS | \
diff -u ./tests/rpmgeneral.at ./tests/rpmgeneral.at
--- ./tests/rpmgeneral.at	2012-03-13 11:30:40.803813509 +0000
+++ ./tests/rpmgeneral.at	2012-03-13 11:30:40.803813509 +0000
@@ -98,6 +98,10 @@
 DISTURL
 DSAHEADER
 E
+ENHANCES
+ENHANCESFLAGS
+ENHANCESNAME
+ENHANCESVERSION
 EPOCH
 EPOCHNUM
 EVR
@@ -252,5 +256,9 @@
 SOURCEPKGID
 SOURCERPM
+SUGGESTS
+SUGGESTSFLAGS
+SUGGESTSNAME
+SUGGESTSVERSION
 SUMMARY
 TRIGGERCONDS
 TRIGGERFLAGS