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 "glm.h"
struct shark_struct{
GLint* faces, *lids, *fins, *eyes, *iris, *pupil;
GLMmodel** m_faces, **m_lids, **m_fins, **m_eyes, **m_iris, **m_pupil;
int curr_face, curr_fin, curr_left_lid, curr_right_lid, curr_right_eye, curr_left_eye, curr_pupil, eye_count;
float curr_fin_angle;
};
void init_shark(FACE f);