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

Author: antma

Makefile.in

@@ -6,8 +6,8 @@ CPPFLAGS=@CPPFLAGS@
 DEFS=@DEFS@
 COMPILE_FLAGS=${CFLAGS} ${CPPFLAGS} ${DEFS} -Wall -Wextra -Werror -Wno-deprecated -fno-strict-aliasing -fno-omit-frame-pointer -ggdb
 
-EXTRA_LIBS=@EXTRA_LIBS@
-LOCAL_LDFLAGS=-lm -lcrypto -lz -lssl -rdynamic -ggdb ${EXTRA_LIBS}
+EXTRA_LIBS=-lssl @LIBS@ @EXTRA_LIBS@
+LOCAL_LDFLAGS=-rdynamic -ggdb ${EXTRA_LIBS}
 LINK_FLAGS=${LDFLAGS} ${LOCAL_LDFLAGS}
 
 HEADERS= ${srcdir}/constants.h  ${srcdir}/include.h  ${srcdir}/interface.h  ${srcdir}/LICENSE.h  ${srcdir}/loop.h  ${srcdir}/mtproto-client.h  ${srcdir}/mtproto-common.h  ${srcdir}/net.h  ${srcdir}/no-preview.h  ${srcdir}/queries.h  ${srcdir}/structures.h  ${srcdir}/telegram.h  ${srcdir}/tree.h ${srcdir}/config.h ${srcdir}/binlog.h ${srcdir}/tools.h ${srcdir}/lua-tg.h

config.h

@@ -13,6 +13,9 @@
 /* Define to 1 if you have the `endpwent' function. */
 #define HAVE_ENDPWENT 1
 
+/* Define to 1 if you have the <execinfo.h> header file. */
+#define HAVE_EXECINFO_H 1
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #define HAVE_FCNTL_H 1
 
@@ -31,6 +34,9 @@
 /* Define to 1 if you have the `m' library (-lm). */
 #define HAVE_LIBM 1
 
+/* Define to 1 if you have the `z' library (-lz). */
+#define HAVE_LIBZ 1
+
 /* Define to 1 if you have the <luaconf.h> header file. */
 #define HAVE_LUACONF_H 1
 

config.h.in

@@ -12,6 +12,9 @@
 /* Define to 1 if you have the `endpwent' function. */
 #undef HAVE_ENDPWENT
 
+/* Define to 1 if you have the <execinfo.h> header file. */
+#undef HAVE_EXECINFO_H
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -30,6 +33,9 @@
 /* Define to 1 if you have the `m' library (-lm). */
 #undef HAVE_LIBM
 
+/* Define to 1 if you have the `z' library (-lz). */
+#undef HAVE_LIBZ
+
 /* Define to 1 if you have the <luaconf.h> header file. */
 #undef HAVE_LUACONF_H