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.

--- ./build/parsePreamble.c.orig	2009-12-17 09:05:55.000000000 +0000
+++ ./build/parsePreamble.c	2010-03-25 14:56:24.000000000 +0000
@@ -124,6 +124,8 @@ static struct tokenBits_s const installS
     { "post",		RPMSENSE_SCRIPT_POST },
     { "rpmlib",		RPMSENSE_RPMLIB },
     { "verify",		RPMSENSE_SCRIPT_VERIFY },
+    { "hint",		RPMSENSE_MISSINGOK },
+    { "strong",		RPMSENSE_STRONG },
     { NULL, 0 }
 };
 
@@ -134,6 +136,8 @@ static const struct tokenBits_s const bu
     { "build",		RPMSENSE_SCRIPT_BUILD },
     { "install",	RPMSENSE_SCRIPT_INSTALL },
     { "clean",		RPMSENSE_SCRIPT_CLEAN },
+    { "hint",		RPMSENSE_MISSINGOK },
+    { "strong",		RPMSENSE_STRONG },
     { NULL, 0 }
 };
 
@@ -649,6 +653,18 @@ static int handlePreambleTag(rpmSpec spe
 	if ((rc = parseRCPOT(spec, pkg, field, tag, 0, tagflags)))
 	    return rc;
 	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:
@@ -748,6 +764,14 @@ static struct PreambleRec_s const preamb
     {RPMTAG_DOCDIR,		0, 0, LEN_AND_STR("docdir")},
     {RPMTAG_DISTTAG,		0, 0, LEN_AND_STR("disttag")},
     {RPMTAG_BUGURL,		0, 0, LEN_AND_STR("bugurl")},
+    {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}
 };
 
--- ./build/parseReqs.c.orig	2009-12-17 09:05:55.000000000 +0000
+++ ./build/parseReqs.c	2010-03-25 14:53:47.000000000 +0000
@@ -85,6 +85,14 @@ rpmRC parseRCPOT(rpmSpec spec, Package p
 	tagflags |= RPMSENSE_ANY;
 	h = spec->buildRestrictions;
 	break;
+    case RPMTAG_SUGGESTSFLAGS:
+    case RPMTAG_ENHANCESFLAGS:
+	h = pkg->header;
+	break;
+    case RPMTAG_BUILDSUGGESTS:
+    case RPMTAG_BUILDENHANCES:
+        h = spec->buildRestrictions;
+        break;
     default:
     case RPMTAG_REQUIREFLAGS:
 	tagflags |= RPMSENSE_ANY;
--- ./build/reqprov.c.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./build/reqprov.c	2010-03-25 14:53:47.000000000 +0000
@@ -75,6 +75,16 @@ int addReqProv(rpmSpec spec, Header h, r
 	flagtag = RPMTAG_TRIGGERFLAGS;
 	indextag = RPMTAG_TRIGGERINDEX;
 	extra = Flags & RPMSENSE_TRIGGER;
+    } else if (tagN == RPMTAG_SUGGESTSFLAGS || tagN == RPMTAG_BUILDSUGGESTS) {
+	nametag = RPMTAG_SUGGESTSNAME;
+	versiontag = RPMTAG_SUGGESTSVERSION;
+	flagtag = RPMTAG_SUGGESTSFLAGS;
+	extra = Flags & _ALL_REQUIRES_MASK;
+    } else if (tagN == RPMTAG_ENHANCESFLAGS || tagN == RPMTAG_BUILDENHANCES) {
+	nametag = RPMTAG_ENHANCESNAME;
+	versiontag = RPMTAG_ENHANCESVERSION;
+	flagtag = RPMTAG_ENHANCESFLAGS;
+	extra = Flags & _ALL_REQUIRES_MASK;
     } else {
 	nametag = RPMTAG_REQUIRENAME;
 	versiontag = RPMTAG_REQUIREVERSION;
--- ./build/rpmfc.c.orig	2009-12-09 13:37:25.000000000 +0000
+++ ./build/rpmfc.c	2010-03-25 14:53:47.000000000 +0000
@@ -1405,6 +1405,12 @@ 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 }
 };
 
@@ -1490,6 +1496,14 @@ static int rpmfcGenerateDependsHelper(co
 	    failnonzero = 0;
 	    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;
--- ./lib/formats.c.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./lib/formats.c	2010-03-25 15:00:15.000000000 +0000
@@ -601,6 +601,24 @@ static char * depflagsFormat(rpmtd td, c
     return val;
 }
 
+static char * depflag_strongFormat(rpmtd td, char * formatPrefix)
+{
+    char * val = NULL;
+
+    if (rpmtdType(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");
+	strcat(formatPrefix, "s");
+	rasprintf(&val, formatPrefix, buf);
+    }
+    return val;
+}
+
 /**
  * Return tag container array size.
  * @param td		tag data container
@@ -738,5 +756,6 @@ static const struct headerFormatFunc_s r
     { RPMTD_FORMAT_ARRAYSIZE,	"arraysize", 	arraysizeFormat },
     { RPMTD_FORMAT_FSTATE,	"fstate",	fstateFormat },
     { RPMTD_FORMAT_VFLAGS,	"vflags",	vflagsFormat },
+    { RPMTD_FORMAT_DEPFLAG_STRONG,	"depflag_strong",	depflag_strongFormat },
     { -1,			NULL, 		NULL }
 };
--- ./lib/rpmds.c.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./lib/rpmds.c	2010-03-25 14:53:47.000000000 +0000
@@ -66,6 +66,10 @@ static int dsType(rpmTag 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;
     } 
--- ./lib/rpmds.h.orig	2010-03-24 16:47:28.000000000 +0000
+++ ./lib/rpmds.h	2010-03-25 14:53:47.000000000 +0000
@@ -55,7 +55,7 @@ typedef	enum rpmsenseFlags_e {
     RPMSENSE_RPMLIB = (1 << 24),	/*!< rpmlib(feature) dependency. */
     RPMSENSE_TRIGGERPREIN = (1 << 25),	/*!< %triggerprein dependency. */
     RPMSENSE_KEYRING	= (1 << 26),
-    RPMSENSE_PATCHES	= (1 << 27),
+    RPMSENSE_STRONG	= (1 << 27),
     RPMSENSE_CONFIG	= (1 << 28)
 } rpmsenseFlags;
 
@@ -74,6 +74,7 @@ typedef	enum rpmsenseFlags_e {
     RPMSENSE_SCRIPT_VERIFY | \
     RPMSENSE_FIND_REQUIRES | \
     RPMSENSE_MISSINGOK | \
+    RPMSENSE_STRONG | \
     RPMSENSE_SCRIPT_PREP | \
     RPMSENSE_SCRIPT_BUILD | \
     RPMSENSE_SCRIPT_INSTALL | \
--- ./lib/rpmtag.h.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./lib/rpmtag.h	2010-03-25 14:53:47.000000000 +0000
@@ -228,14 +228,14 @@ 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 */
+#define	RPMTAG_ENHANCES RPMTAG_ENHANCESNAME	/* s[] */
+    RPMTAG_ENHANCESVERSION	= 1160,	/* s[] extension */
+    RPMTAG_ENHANCESFLAGS	= 1161,	/* i[] extension */
     RPMTAG_PRIORITY		= 1162, /* i[] extension placeholder (unimplemented) */
     RPMTAG_CVSID		= 1163, /* s (unimplemented) */
 #define	RPMTAG_SVNID	RPMTAG_CVSID	/* s (unimplemented) */
--- ./lib/rpmtd.h.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./lib/rpmtd.h	2010-03-25 14:58:31.000000000 +0000
@@ -216,6 +216,7 @@ typedef enum rpmtdFormats_e {
     RPMTD_FORMAT_DEPTYPE	= 15,	/* dependency types (int types) */
     RPMTD_FORMAT_FSTATE		= 16,	/* file states (int types) */
     RPMTD_FORMAT_VFLAGS		= 17,	/* file verify flags (int types) */
+    RPMTD_FORMAT_DEPFLAG_STRONG	= 18,	/* strong dependency */
 } rpmtdFormats;
 
 /** \ingroup rpmtd
--- ./python/rpmmodule.c.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./python/rpmmodule.c	2010-03-25 14:53:47.000000000 +0000
@@ -373,7 +373,7 @@ static int initModule(PyObject *m)
     REGISTER_ENUM(RPMSENSE_RPMLIB);
     REGISTER_ENUM(RPMSENSE_TRIGGERPREIN);
     REGISTER_ENUM(RPMSENSE_KEYRING);
-    REGISTER_ENUM(RPMSENSE_PATCHES);
+    REGISTER_ENUM(RPMSENSE_STRONG);
     REGISTER_ENUM(RPMSENSE_CONFIG);
 
     REGISTER_ENUM(RPMTRANS_FLAG_TEST);
--- ./rpmpopt.in.orig	2009-12-07 14:36:49.000000000 +0000
+++ ./rpmpopt.in	2010-03-25 14:53:47.000000000 +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        : %-27{NAME}  Relocations: %|PREFIXES?{[%{PREFIXES} ]}:{(not relocatable)}|\n\
 Version     : %-27{VERSION}       Vendor: %{VENDOR}\n\
 Release     : %-27{RELEASE}   Build Date: %{BUILDTIME:date}\n\