pidgin/pidgin

Use LT_LIB_M to determine if we need to link to the math library and link Pidgin to the X11 libraries
release-2.x.y
2021-04-11, Gary Kramlich
132d17234930
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/
#include <gtk/gtk.h>
#include <gtk/gtkgl.h>
#define DEFAULT_FRAME_DELAY 40
typedef void (gl_init_func) (GtkWidget *widget, void *data);
typedef gboolean (*gl_config_func) (GtkWidget *widget, GdkEventConfigure *event,
void *data);
typedef gboolean (*gl_draw_func) (GtkWidget *widget, GdkEventExpose *event,
void *data);
struct draw_info {
gboolean timeout; /* use/not use a timer callback */
int timer_id; /* glib timer callback id */
guint delay_ms; /* timer callback delay in ms */
void *data; /* drawing data */
};
struct window_box {
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *draw_area;
};
/**
* Initialize the gtkglext framework for all our widgets.
* @return 0 on success, non-zero on failure
*/
int cc_init_gtk_gl(void);
/**
* Create a new OpenGL enabled window
* @param init the initialize callback function
* @param draw the drawing callback function
* @param data drawing metadata
* @param ret struct with returned window and vbox
*/
void cc_new_gl_window(gl_init_func init, gl_config_func config,
gl_draw_func draw, struct draw_info *data,
struct window_box *ret);
/**
* Create a new OpenGL enabled drawing area widget.
* @param init the initialize callback function
* @param draw the drawing callback function
* @param data drawing metadata
* @return the drawing widget
*/
GtkWidget *cc_new_gl_area(gl_init_func init, gl_config_func config,
gl_draw_func draw, struct draw_info *data);