Replace getopt_long_only with getopt_long and #include <execinfo.h> is somehow dragged in on BSD systems? about glyr

[sahib]

Hi there,

Thanks for the hint.
I was not aware that getopt_long_only was a GNU Extension. I'm totally fine with that change.

For execinfo.h: I replaced #ifndef G_OS_WIN32 with #ifdef __linux__ so it only is compiled in for compatible machines I did not found any HAVE_EXECINFO or better-fitting feature macros (sigh)

Give me some feedback if everything compiles fine now.

[ShadowKyogre]

Friend compiled it with the applied with the applied changes and it works! I also compiled it to make sure the changes didn't do anything weird to building it on Linux boxes.