vysheng/tg — pull request #56 by antma (2014-02-03 12:28:43+00:00)
Title: remove printf from signal handlers and reduce configure.ac

remove printf from signal handlers
use AC_SEARCH_LIB in configure.ac (shorter code)
replace '-lm -lcrypto -lz' by @LIBS@ in Makefile.in and AC_CHECK_LIB macros in configure.ac
replace NO_BACKTRACE by HAVE_EXECINFO_H