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/
/** @page log-signals Log Signals
@signals
@signal log-timestamp
@endsignals
@see log.h
<hr>
@signaldef log-timestamp
@signalproto
char *(*log_timestamp)(PurpleLog *log, time_t when, gboolean show_date);
@endsignalproto
@signaldesc
Emitted to allow plugins to customize the timestamp on a message
being logged.
@param log The log the message belongs to.
@param when The time to be converted to a string.
@param show_date Whether the date should be displayed.
@return A textual representation of the time, or @c NULL to use a
default format.
@note Plugins must be careful of logs with a type of PURPLE_LOG_SYSTEM.
@endsignaldef
*/
// vim: syntax=c.doxygen tw=75 et