We like to use libunwind to get backtraces on an ARM machine. But we hit a problem.
Because the applications we like to link with libunwind need to run at armv5te *and* x86 machines, we use GNU autotools. Our first try for configure.ac was ... AC_CHECK_LIB([unwind], [_Unwind_Backtrace], [], [ AC_MSG_ERROR([*** Could not find libunwind ***]) ]) AC_CHECK_LIB([dbus-1], [dbus_connection_open], [], [ AC_MSG_ERROR([*** Could not find libdbus-1 ***]) ]) ... At the arm machine already the configure step fails with this (at x86 it is OK). :( checking for _Unwind_Backtrace in -lunwind... yes checking for dbus_connection_open in -ldbus-1... no configure: error: *** Could not find libdbus-1 *** The details in config.log are these: ------------------->snip<------------------- configure:3500: checking for _Unwind_Backtrace in -lunwind configure:3535: gcc -o conftest -g -O2 conftest.c -lunwind >&5 configure:3542: $? = 0 configure:3563: result: yes configure:3580: checking for dbus_connection_open in -ldbus-1 configure:3615: gcc -o conftest -g -O2 conftest.c -ldbus-1 -lunwind >&5 /usr/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../libunwind.so: undefined reference to `__aeabi_unwind_cpp_pr0' /usr/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../libunwind.so: undefined reference to `__aeabi_unwind_cpp_pr1' collect2: ld returned 1 exit status configure:3622: $? = 1 configure: failed program was: | /* confdefs.h. */ | #define PACKAGE_NAME "drctrl" | #define PACKAGE_TARNAME "drctrl" | #define PACKAGE_VERSION "0.1" | #define PACKAGE_STRING "drctrl 0.1" | #define PACKAGE_BUGREPORT "[email protected]" | #define PACKAGE "drctrl" | #define VERSION "0.1" | #define HAVE_LIBUNWIND 1 | /* 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 dbus_connection_open (); | int | main () | { | return dbus_connection_open (); | ; | return 0; | } configure:3643: result: no ------------------->snip<------------------- Any hints how to do it right? Regards, Steffen _______________________________________________ Libunwind-devel mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/libunwind-devel
