diff -upk.orig pkg-config-0.20.orig/main.c pkg-config-0.20/main.c
--- pkg-config-0.20.orig/main.c	2005-10-16 18:04:50 +0000
+++ pkg-config-0.20/main.c	2006-02-02 00:17:40 +0000
@@ -188,6 +188,8 @@ main (int argc, char **argv)
   int want_uninstalled = 0;
   char *variable_name = NULL;
   int want_exists = 0;
+  int want_prov = 0;
+  int want_req = 0;
   char *required_atleast_version = NULL;
   char *required_exact_version = NULL;
   char *required_max_version = NULL;
@@ -257,6 +259,10 @@ main (int argc, char **argv)
       "show verbose information about missing or conflicting packages" },
     { "errors-to-stdout", 0, POPT_ARG_NONE, &want_stdout_errors, 0,
       "print errors from --print-errors to stdout not stderr" },
+    { "print-provides", 0, POPT_ARG_NONE, &want_prov, 0,
+      "print which packages the package provides" },
+    { "print-requires", 0, POPT_ARG_NONE, &want_req, 0,
+      "print which packages the package requires" },
 #ifdef G_OS_WIN32
     { "dont-define-prefix", 0, POPT_ARG_NONE, &dont_define_prefix, 0,
       "don't try to override the value of prefix for each .pc file found with "
@@ -560,6 +566,47 @@ main (int argc, char **argv)
         }
     }
 
+ if (want_prov)
+   {
+     GSList *tmp;
+     tmp = packages;
+     while (tmp != NULL)
+       {
+         Package *pkg = tmp->data;
+         char *key;
+         key = pkg->key;
+         while (*key == '/')
+           key++;
+         if (strlen(key) > 0)
+           printf ("%s = %s\n", key, pkg->version);
+         tmp = g_slist_next (tmp);
+       }
+   }
+
+ if (want_req)
+   {
+     GSList *pkgtmp = packages;
+     while (pkgtmp != NULL)
+       {
+         Package *pkg = pkgtmp->data;
+         GSList *reqtmp = pkg->requires;
+         while (reqtmp != NULL)
+           {
+             Package *deppkg = reqtmp->data;
+             RequiredVersion *req;
+             req = g_hash_table_lookup(pkg->required_versions, deppkg->key);
+             if ((req == NULL) || (req->comparison == ALWAYS_MATCH))
+               printf ("%s\n", deppkg->key);
+             else
+               printf ("%s %s %s\n", deppkg->key,
+                       comparison_to_str(req->comparison),
+                       req->version);
+             reqtmp = g_slist_next (reqtmp);
+           }
+         pkgtmp = g_slist_next (pkgtmp);
+       }
+   }
+
   if (required_exact_version)
     {
       Package *pkg = packages->data;
diff -upk.orig pkg-config-0.20.orig/pkg-config.1 pkg-config-0.20/pkg-config.1
--- pkg-config-0.20.orig/pkg-config.1	2005-10-16 17:09:39 +0000
+++ pkg-config-0.20/pkg-config.1	2006-02-02 00:21:03 +0000
@@ -93,6 +93,14 @@ command line) or with other options. The
 environment variable overrides this option.
 
 .TP
+.I "--print-provides"
+Print which packages the package provides.
+
+.TP
+.I "--print-requires"
+Print which packages the package requires.
+
+.TP
 .I "--silence-errors"
 If one or more of the modules on the command line, or their
 dependencies, are not found, or if an error occurs in parsing a