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/
#ifndef __FILTER_H__
#define __FILTER_H__
struct cc_features;
typedef struct filter_bank {
float head_size[10];
float head_z_rot[10];
float head_y_rot[10];
float mouth_open[10];
float xfilt[10];
float yfilt[10];
} filter_bank;
filter_bank* Filter_Initialize (void);
void Filter_Destroy (filter_bank *f);
void filter(struct cc_features *instance, filter_bank *f);
#endif /* __FILTER_H__ */