On Mon, Jul 08, 2013 at 12:24:14AM -0700, Luca Clementi wrote:
[...]
> --- a/configure.ac
> +++ b/configure.ac
> @@ -261,6 +261,63 @@ AC_CHECK_MEMBERS([struct sigcontext.sc_hi2],,, [#include
> <signal.h>
> # include <asm/sigcontext.h>
> #endif])
>
> +
> +dnl stack trace with libunwind
> +AC_ARG_WITH([libunwind],
> + [AS_HELP_STRING([--with-libunwind],
> + [libunwind is used to display system call
> stacktrace])],
> + [case "${withval}" in
> + (yes|no) enable_libunwind=$withval;;
> + (*) enable_libunwind=yes
> + libunwind_CPPFLAGS="${AM_CPPFLAGS} -I${withval}/include"
> + libunwind_LDFLAGS="-L${withval}/lib" ;;
> + esac],
> + [enable_libunwind=maybe])
If the option is called --with-libunwind, then the options's argument
variable should be called with_libunwind. BTW, do you really need this
libunwind_CPPFLAGS/libunwind_LDFLAGS stuff? Wouldn't a simple tristate
(yes|no|check) be enough?
> +AS_IF([test "x$enable_libunwind" != xno],
> + [saved_CPPFLAGS="${CPPFLAGS}"
> + CPPFLAGS="${CPPFLAGS} ${libunwind_CPPFLAGS}"
> + AC_CHECK_HEADERS([libunwind-ptrace.h libunwind.h])
> + CPPFLAGS="${saved_CPPFLAGS}" ])
> +
> +if test "x$ac_cv_header_libunwind_ptrace_h" = "xyes" &&
> + test "x$ac_cv_header_libunwind_h" = "xyes"; then
If --with-libunwind was given and one of these header files is not
available, configure should fail.
> + dnl code is taken from ltrace
> + case "${host_cpu}" in
> + arm*|sa110) UNWIND_ARCH="arm" ;;
> + i?86) UNWIND_ARCH="x86" ;;
> + powerpc) UNWIND_ARCH="ppc32" ;;
> + powerpc64) UNWIND_ARCH="ppc64" ;;
> + mips*) UNWIND_ARCH="mips" ;;
> + *) UNWIND_ARCH="${host_cpu}" ;;
> + esac
> +
> + saved_LDFLAGS="${LDFLAGS}"
> + LDFLAGS="${LDFLAGS} ${libunwind_LDFLAGS}"
> + AC_CHECK_LIB([unwind], [backtrace],
> + [libunwind_LIBS="-lunwind"],
> + [AC_MSG_FAILURE([Unable to find libunwind])])
> + AC_CHECK_LIB([unwind-generic], [_U${UNWIND_ARCH}_create_addr_space],
> + [libunwind_LIBS="-lunwind-generic $libunwind_LIBS"],
> + [AC_MSG_FAILURE([Unable to find libunwind-generic])],
> + [$libunwind_LIBS])
> + AC_CHECK_LIB([unwind-ptrace], [_UPT_create],
> + [libunwind_LIBS="-lunwind-ptrace $libunwind_LIBS"],
> + [AC_MSG_FAILURE([Unable to find libunwind-ptrace])],
> + [$libunwind_LIBS])
> + LDFLAGS="${saved_LDFLAGS}"
If --with-libunwind was not given and one of these symbols is not
available, configure should not fail.
--
ldv
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