added libunwind detection to configure.ac

moo/Makefile.in

@@ -307,6 +307,7 @@ SOCKET_LIBS = @SOCKET_LIBS@
 STRIP = @STRIP@
 TERMINAL_LIBS = @TERMINAL_LIBS@
 UNICOWS_LIBS = @UNICOWS_LIBS@
+UNWIND_LIBS = @UNWIND_LIBS@
 VERSION = @VERSION@
 abs_builddir = @abs_builddir@
 abs_srcdir = @abs_srcdir@

moo/configure

@@ -673,6 +673,7 @@ QUADMATH_LIBS
 UNICOWS_LIBS
 SOCKET_LIBS
 TERMINAL_LIBS
+UNWIND_LIBS
 DYNCALL_LIBS
 LTDL_LIBS
 DL_LIBS
@@ -18263,12 +18264,13 @@ fi
 
 done
 
-for ac_header in dyncall.h
+for ac_header in netinet/in.h sys/un.h netpacket/packet.h net/if_dl.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "dyncall.h" "ac_cv_header_dyncall_h" "$ac_includes_default"
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-if test "x$ac_cv_header_dyncall_h" = xyes; then :
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_DYNCALL_H 1
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
 _ACEOF
 
 fi
@@ -18287,7 +18289,7 @@ fi
 
 done
 
-for ac_header in netinet/in.h sys/un.h netpacket/packet.h net/if_dl.h
+for ac_header in dyncall.h libunwind.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@@ -18566,6 +18568,58 @@ fi
 
 
 
+if test "x${ac_cv_header_libunwind_h}" = "xyes"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for unw_backtrace in -lunwind" >&5
+$as_echo_n "checking for unw_backtrace in -lunwind... " >&6; }
+if ${ac_cv_lib_unwind_unw_backtrace+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lunwind  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char unw_backtrace ();
+int
+main ()
+{
+return unw_backtrace ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_unwind_unw_backtrace=yes
+else
+  ac_cv_lib_unwind_unw_backtrace=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_unwind_unw_backtrace" >&5
+$as_echo "$ac_cv_lib_unwind_unw_backtrace" >&6; }
+if test "x$ac_cv_lib_unwind_unw_backtrace" = xyes; then :
+
+			UNWIND_LIBS="-lunwind"
+
+$as_echo "#define HAVE_UNWIND_LIB 1" >>confdefs.h
+
+
+
+fi
+
+
+fi
+
+
 save_LIBS="$LIBS"
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing setupterm" >&5
 $as_echo_n "checking for library containing setupterm... " >&6; }

moo/configure.ac

@@ -129,9 +129,9 @@ AC_CHECK_HEADERS([stddef.h wchar.h wctype.h errno.h signal.h fcntl.h dirent.h])
 AC_CHECK_HEADERS([time.h sys/time.h utime.h spawn.h execinfo.h ucontext.h])
 AC_CHECK_HEADERS([dlfcn.h ltdl.h sys/mman.h])
 AC_CHECK_HEADERS([sys/devpoll.h sys/epoll.h poll.h])
-AC_CHECK_HEADERS([dyncall.h])
-AC_CHECK_HEADERS([xcb/xcb.h])
 AC_CHECK_HEADERS([netinet/in.h sys/un.h netpacket/packet.h net/if_dl.h])
+AC_CHECK_HEADERS([xcb/xcb.h])
+AC_CHECK_HEADERS([dyncall.h libunwind.h])
 
 dnl check data types
 dnl AC_CHECK_TYPE([wchar_t], 
@@ -179,6 +179,18 @@ AC_CHECK_LIB([dyncall_s], [dcNewCallVM],
 )
 AC_SUBST(DYNCALL_LIBS)
 
+if test "x${ac_cv_header_libunwind_h}" = "xyes" 
+then
+	AC_CHECK_LIB([unwind], [unw_backtrace], 
+		[
+			UNWIND_LIBS="-lunwind"
+			AC_DEFINE([HAVE_UNWIND_LIB], [1], [libunwind is available])
+		]
+	)
+	AC_SUBST(UNWIND_LIBS)
+fi
+
+
 save_LIBS="$LIBS"
 AC_SEARCH_LIBS([setupterm], [tinfo termcap curses ncurses ncursesw], [TERMINAL_LIBS="$ac_cv_search_setupterm"])
 LIBS="$save_LIBS"

moo/lib/Makefile.in

@@ -350,6 +350,7 @@ SOCKET_LIBS = @SOCKET_LIBS@
 STRIP = @STRIP@
 TERMINAL_LIBS = @TERMINAL_LIBS@
 UNICOWS_LIBS = @UNICOWS_LIBS@
+UNWIND_LIBS = @UNWIND_LIBS@
 VERSION = @VERSION@
 abs_builddir = @abs_builddir@
 abs_srcdir = @abs_srcdir@

moo/lib/moo-cfg.h.in

@@ -99,6 +99,9 @@
 /* labels as values */
 #undef HAVE_LABELS_AS_VALUES
 
+/* Define to 1 if you have the <libunwind.h> header file. */
+#undef HAVE_LIBUNWIND_H
+
 /* Define to 1 if you have the `log10q' function. */
 #undef HAVE_LOG10Q
 
@@ -243,6 +246,9 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
+/* libunwind is available */
+#undef HAVE_UNWIND_LIB
+
 /* Define to 1 if you have the `usleep' function. */
 #undef HAVE_USLEEP
 

moo/mod/Makefile.in

@@ -376,6 +376,7 @@ SOCKET_LIBS = @SOCKET_LIBS@
 STRIP = @STRIP@
 TERMINAL_LIBS = @TERMINAL_LIBS@
 UNICOWS_LIBS = @UNICOWS_LIBS@
+UNWIND_LIBS = @UNWIND_LIBS@
 VERSION = @VERSION@
 abs_builddir = @abs_builddir@
 abs_srcdir = @abs_srcdir@