pidgin/pidgin

Use LT_LIB_M to determine if we need to link to the math library and link Pidgin to the X11 libraries

Gentoo ran into an issue with the gold linker without -lm. The original patch
and work came from Justin Lechner. https://bugs.gentoo.org/386079

Gentoo also ran into an issue with X11_LIBS not being added to pidgin. This
should already be implicit everywhere except for homebrew which patches X11
out of their build. Original patch/work came from and. https://bugs.gentoo.org/500762

Testing Done:
Installed and ran locally.

Reviewed at https://reviews.imfreedom.org/r/608/
/**
* @file xdata.h utility functions
*
* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef PURPLE_JABBER_XDATA_H_
#define PURPLE_JABBER_XDATA_H_
#include "jabber.h"
#include "xmlnode.h"
typedef struct _JabberXDataAction {
char *name;
char *handle;
} JabberXDataAction;
typedef void (*jabber_x_data_cb)(JabberStream *js, xmlnode *result, gpointer user_data);
typedef void (*jabber_x_data_action_cb)(JabberStream *js, xmlnode *result, const char *actionhandle, gpointer user_data);
void *jabber_x_data_request(JabberStream *js, xmlnode *packet, jabber_x_data_cb cb, gpointer user_data);
void *jabber_x_data_request_with_actions(JabberStream *js, xmlnode *packet, GList *actions, int defaultaction, jabber_x_data_action_cb cb, gpointer user_data);
/*
* Return the form type (the CDATA of the value child of the FORM_TYPE
* field entry.
* E.g., for the following, "http://jabber.org/protocol/muc#roominfo".
* <x xmlns='jabber:x:data' type='result'>
* <field var='FORM_TYPE' type='hidden'>
* <value>http://jabber.org/protocol/muc#roominfo</value>
* </field>
* </x>
*
* @param form The xmlnode for the form (the 'x' element)
* @returns The FORM_TYPE. Must be freed by caller.
*/
gchar *jabber_x_data_get_formtype(const xmlnode *form);
#endif /* PURPLE_JABBER_XDATA_H_ */