diff options
Diffstat (limited to 'source3/configure.in')
| -rw-r--r-- | source3/configure.in | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/source3/configure.in b/source3/configure.in index bb4cf82f35..fc5bad6dab 100644 --- a/source3/configure.in +++ b/source3/configure.in @@ -1280,12 +1280,61 @@ AC_TRY_LINK( [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_LIBUNWIND, 1, [Whether libunwind is available]) + + # If we have libunwind, test whether we also have libunwind-ptrace + # which would let us unwind arbitrary processes. + save_LIBS=$LIBS + AC_CHECK_HEADERS(libunwind-ptrace.h) + AC_CHECK_LIB(unwind-ptrace, _UPT_create, + [ + LIBUNWIND_PTRACE="-lunwind-ptrace"; + AC_DEFINE(HAVE_LIBUNWIND_PTRACE, 1, + [Whether libunwind-ptrace.a is available.]) + ], + [ LIBUNWIND_PTRACE="" ]) + + LIBS=$save_LIBS ], [ AC_MSG_RESULT(no) LIBS=$save_LIBS ]) +# To use libunwind-ptrace, we also need to make some ptrace system calls. +if test x"$LIBUNWIND_PTRACE" != x"" ; then + AC_CHECK_HEADERS(sys/ptrace.h) + AC_MSG_CHECKING([for the Linux ptrace(2) interface]) + AC_TRY_LINK( + [ +#if HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif +#if HAVE_SYS_PTRACE_H +#include <sys/ptrace.h> +#endif + ], + [ + int main(int argc, const char ** argv) + { + pid_t me = (pid_t)-1; + ptrace(PTRACE_ATTACH, me, 0, 0); + ptrace(PTRACE_DETACH, me, 0, 0); + return 0; + } + ], + [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_LINUX_PTRACE, 1, + [Whether the Linux ptrace(2) interface is available.]) + ], + [ + AC_MSG_RESULT(no) + LIBUNWIND_PTRACE="" + ]) +fi + +AC_SUBST(LIBUNWIND_PTRACE) + # syscall() is needed for smbwrapper. AC_CHECK_FUNCS(syscall) |