RPMTAG_SIZE counter is broken a bit.

1) Duplicate file entries are not getting merged.

%install
mkdir -p %buildroot/foo
head -c 1024 /dev/zero >%buildroot/foo/1
%files
/foo/1
/foo/1

RPMTAG_SIZE == 2048.

2) File flags are not getting mreged.

%install
mkdir -p %buildroot/foo
head -c 1024 /dev/zero >%buildroot/foo/1
%files
/foo/1
%exclude /foo/1

RPMTAG_SIZE == 1024 (empty package).

3) Similar problems with %ghost files.

To fix the problem, RPMTAG_SIZE counter should be invoked after
file dups are merged.  This means the code should be moved from
addFile() to genCpioListAndHeader().

--- rpm-5.1.3/build/files.c-	2008-04-06 12:47:47 +0400
+++ rpm-5.1.3/build/files.c	2008-06-16 07:16:45 +0400
@@ -1601,15 +1601,6 @@ if (!(_rpmbuildFlags & 4))
 /*@=moduncon =noeffectuncon @*/
     sxfn = _free(sxfn);
 
-    ui32 = fl->totalFileSize;
-    he->tag = RPMTAG_SIZE;
-    he->t = RPM_UINT32_TYPE;
-    he->p.ui32p = &ui32;
-    he->c = 1;
-    he->append = 1;
-    xx = headerPut(h, he, 0);
-    he->append = 0;
-
 if (_rpmbuildFlags & 4) {
 (void) rpmlibNeedsFeature(h, "PayloadFilesHavePrefix", "4.0-1");
 (void) rpmlibNeedsFeature(h, "CompressedFileNames", "3.0.4-1");
@@ -1713,7 +1704,44 @@ if (_rpmbuildFlags & 4) {
 	if (isSrc)
 	    fi->fmapflags[i] |= IOSM_FOLLOW_SYMLINKS;
 
+	if (S_ISREG(flp->fl_mode) && flp->fl_nlink == 1)
+	    fl->totalFileSize += flp->fl_size;
+	else if (S_ISREG(flp->fl_mode) && flp->fl_nlink > 1) {
+	    /* Hard links need be counted only once. */
+	    FileListRec jlp;
+	    int j;
+	    int found = 0;
+	    for (j = i+1, jlp = flp+1; (unsigned)j < fi->fc; j++, jlp++) {
+		while (((jlp - fl->fileList) < (fl->fileListRecsUsed - 1)) &&
+			!strcmp(jlp->fileURL, jlp[1].fileURL))
+		    jlp++;
+		if (!S_ISREG(jlp->fl_mode))
+		    continue;
+		if (flp->fl_nlink != jlp->fl_nlink)
+		    continue;
+		if (flp->fl_ino != jlp->fl_ino)
+		    continue;
+		if (flp->fl_dev != jlp->fl_dev)
+		    continue;
+		if (jlp->flags & (RPMFILE_EXCLUDE | RPMFILE_GHOST))
+		    continue;
+		found = 1;
+		break;
+	    }
+	    if (!found) /* last entry in hardlink set */
+		fl->totalFileSize += flp->fl_size;
+	}
     }
+
+    ui32 = fl->totalFileSize;
+    he->tag = RPMTAG_SIZE;
+    he->t = RPM_UINT32_TYPE;
+    he->p.ui32p = &ui32;
+    he->c = 1;
+    he->append = 1;
+    xx = headerPut(h, he, 0);
+    he->append = 0;
+
     /*@-compdef@*/
     if (fip)
 	*fip = fi;
@@ -1947,26 +1975,6 @@ static int addFile(FileList fl, const ch
 	flp->specdFlags = fl->currentSpecdFlags;
 	flp->verifyFlags = fl->currentVerifyFlags;
 
-	/* Hard links need be counted only once. */
-	if (S_ISREG(flp->fl_mode) && flp->fl_nlink > 1) {
-	    FileListRec ilp;
-	    for (i = 0;  i < fl->fileListRecsUsed; i++) {
-		ilp = fl->fileList + i;
-		if (!S_ISREG(ilp->fl_mode))
-		    continue;
-		if (flp->fl_nlink != ilp->fl_nlink)
-		    continue;
-		if (flp->fl_ino != ilp->fl_ino)
-		    continue;
-		if (flp->fl_dev != ilp->fl_dev)
-		    continue;
-		break;
-	    }
-	} else
-	    i = fl->fileListRecsUsed;
-
-	if (!(flp->flags & RPMFILE_EXCLUDE) && S_ISREG(flp->fl_mode) && i >= fl->fileListRecsUsed) 
-	    fl->totalFileSize += flp->fl_size;
     }
 
     fl->fileListRecsUsed++;
@@ -2758,8 +2766,6 @@ int processSourceFiles(Spec spec)
 #endif
 	flp->langs = xstrdup("");
 	
-	fl.totalFileSize += flp->fl_size;
-	
 	if (! (flp->uname && flp->gname)) {
 	    rpmlog(RPMLOG_ERR, _("Bad owner/group: %s\n"), diskURL);
 	    rc = fl.processingFailed = 1;