From 5de1df39d322de2f0a6029ed6747615a1c6131ea Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 22 May 2014 09:27:09 +1000
Subject: [PATCH] Add a --print-location argument to print _where_ a .pc file
 is located

This can help tremendously when debugging PKG_CONFIG_PATH errors, especially
if the path is set up to the wrong directory. With --print-location one can
easily find out which .pc file is picked up and where an error comes from.

Freedesktop #79030 (https://bugs.freedesktop.org/show_bug.cgi?id=79030)
---
 main.c       | 24 +++++++++++++++++++++++-
 pkg-config.1 |  4 ++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index 62758b8..aa63092 100644
--- a/main.c
+++ b/main.c
@@ -50,6 +50,7 @@ static gboolean want_exists = FALSE;
 static gboolean want_provides = FALSE;
 static gboolean want_requires = FALSE;
 static gboolean want_requires_private = FALSE;
+static gboolean want_location = FALSE;
 static char *required_atleast_version = NULL;
 static char *required_exact_version = NULL;
 static char *required_max_version = NULL;
@@ -247,6 +248,8 @@ output_opt_cb (const char *opt, const char *arg, gpointer data,
     want_requires = TRUE;
   else if (strcmp (opt, "--print-requires-private") == 0)
     want_requires_private = TRUE;
+  else if (strcmp (opt, "--print-location") == 0)
+    want_location = TRUE;
   else
     return FALSE;
 
@@ -461,6 +464,8 @@ static const GOptionEntry options_table[] = {
   { "print-requires-private", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
     &output_opt_cb, "print which packages the package requires for static "
     "linking", NULL },
+  { "print-location", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
+    &output_opt_cb, "print the location of the .pc file", NULL },
   { "define-prefix", 0, 0, G_OPTION_ARG_NONE, &define_prefix,
     "try to override the value of prefix for each .pc file found with a "
     "guesstimated value based on the location of the .pc file", NULL },
@@ -801,7 +806,24 @@ main (int argc, char **argv)
             }
         }
     }
-  
+
+  if (want_location)
+    {
+      GList *tmp;
+      tmp = packages;
+      while (tmp != NULL)
+        {
+          Package *pkg = tmp->data;
+          printf("%s/%s.pc\n", pkg->pcfiledir, pkg->key);
+
+          if (pkg_uninstalled (pkg))
+            return 0;
+
+          tmp = g_list_next (tmp);
+        }
+
+    }
+
   /* Print all flags; then print a newline at the end. */
   need_newline = FALSE;
 
diff --git a/pkg-config.1 b/pkg-config.1
index 3ee869f..01ecba4 100644
--- a/pkg-config.1
+++ b/pkg-config.1
@@ -23,6 +23,7 @@ pkg-config \- Return metainformation about installed libraries
 [\-\-exists] [\-\-atleast-version=VERSION] [\-\-exact-version=VERSION]
 [\-\-max-version=VERSION] [\-\-list\-all] [\-\-print-provides]
 [\-\-print-requires] [\-\-print-requires-private] [LIBRARIES...]
+[\-\-print-location] [LIBRARIES...]
 .SH DESCRIPTION
 
 The \fIpkg-config\fP program is used to retrieve information about
@@ -276,6 +277,9 @@ List all modules the given packages requires.
 .TP
 .I "--print-requires-private"
 List all modules the given packages requires for static linking (see --static).
+.TP
+.I "--print-location"
+Print the full path of .pc file for each library.
 .\"
 .SH ENVIRONMENT VARIABLES
 .TP
-- 
1.9.0