Portability

Various portability issues, mainly between linux/freebsd

• prctl() / prctl.h

No prctl() in freebsd.

• • To set process title, use setproctitle()
  • For PR_SET_PTRACER, I'm not sure now.

• malloc.h

Including malloc.h in freebsd leads to compile error. Use stdlib.h instead.

Anyway, in linux's malloc(3) manpage, it is said that you should include stdlib.h.

• libdl

In linux, dlopen()/dlclose()/dlsym() are in libdl. In freebsd, they are in libc. So there is no point to link with libdl, and there is no libdl, anyway.

• program_invocation_short_name

No such thing in bsd. Maybe you should use argv[0].

• Include path / Lib path

freebsd installs all non-base softwares into /usr/local. So, the third party include files are in /usr/local/include, and third party lib files are in /usr/local/lib, and they are not in the default include/lib path, so you should include them with -I & -L.