Index: pkg-config-0.23-aix.orig/pkg-config.1
===================================================================
--- pkg-config-0.23-aix.orig/pkg-config.1	2008-01-16 22:26:50.000000000 +0100
+++ pkg-config-0.23-aix/pkg-config.1	2008-10-05 10:43:06.000000000 +0200
@@ -33,6 +33,7 @@
 [\-\-libs-only-l] [\-\-cflags-only-I]
 [\-\-variable=VARIABLENAME]
 [\-\-define-variable=VARIABLENAME=VARIABLEVALUE]
+[\-\-print-variables]
 [\-\-uninstalled]
 [\-\-exists] [\-\-atleast-version=VERSION] [\-\-exact-version=VERSION]
 [\-\-max-version=VERSION] [LIBRARIES...]
@@ -156,6 +157,10 @@
 .fi
 
 .TP
+.I "--print-variables"
+Returns a list of all variables defined in the package.
+
+.TP
 .I "--uninstalled"
 Normally if you request the package "foo" and the package
 "foo-uninstalled" exists, \fIpkg-config\fP will prefer the 
Index: pkg-config-0.23-aix/main.c
===================================================================
--- pkg-config-0.23-aix.orig/main.c	2008-01-16 23:06:48.000000000 +0100
+++ pkg-config-0.23-aix/main.c	2008-10-05 10:43:29.000000000 +0200
@@ -170,6 +170,14 @@
   return FALSE;
 }
 
+void
+print_hashtable_key (gpointer key,
+                     gpointer value,
+                     gpointer user_data)
+{
+  printf("%s\n", (gchar*)key);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -202,6 +210,7 @@
   char **search_dirs;
   char **iter;
   gboolean need_newline;
+  int want_variable_list = 0;
 
   const char *pkgname;
   Package *pkg;
@@ -238,6 +247,8 @@
       "get the value of a variable", "VARIABLENAME" },
     { "define-variable", 0, POPT_ARG_STRING, NULL, DEFINE_VARIABLE,
       "set the value of a variable", "VARIABLENAME=VARIABLEVALUE" },
+    { "print-variables", 0, POPT_ARG_NONE, &want_variable_list, 0,
+      "output list of variables defined by the module" },
     { "exists", 0, POPT_ARG_NONE, &want_exists, 0,
       "return 0 if the module(s) exist" },
     { "uninstalled", 0, POPT_ARG_NONE, &want_uninstalled, 0,
@@ -404,7 +415,8 @@
       want_other_libs ||
       want_I_cflags ||
       want_other_cflags ||
-      want_list)
+      want_list ||
+      want_variable_list)
     {
       debug_spew ("Error printing enabled by default due to use of --version, --libs, --cflags, --libs-only-l, --libs-only-L, --libs-only-other, --cflags-only-I, --cflags-only-other or --list. Value of --silence-errors: %d\n", want_silence_errors);
 
@@ -522,6 +534,23 @@
       return 1;
     }
 
+  if (want_variable_list)
+    {
+      GSList *tmp;
+      gchar  *str;
+      tmp = packages;
+      while (tmp != NULL)
+        {
+          Package *pkg = tmp->data;
+          g_hash_table_foreach(pkg->vars,
+                               &print_hashtable_key,
+                               NULL);
+          tmp = g_slist_next (tmp);
+          if (tmp) printf ("\n");
+        }
+      need_newline = FALSE;
+    }
+
   }
 
   g_string_free (str, TRUE);