On Tue, Oct 15, 2019 at 3:25 PM Ben Pfaff <[email protected]> wrote: > > On Tue, Oct 15, 2019 at 02:30:48PM -0700, Yi-Hung Wei wrote: > > It is possible that user install libunwind but not libunwind-devel, > > and it will run into a compilation error. So check the existence > > of the header file instead of the library. > > > > Fixes: e2ed6fbeb18c ("fatal-signal: Catch SIGSEGV and print backtrace.") > > Signed-off-by: Yi-Hung Wei <[email protected]> > > --- > > m4/openvswitch.m4 | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/m4/openvswitch.m4 b/m4/openvswitch.m4 > > index 79e0be5a33dd..da7119951484 100644 > > --- a/m4/openvswitch.m4 > > +++ b/m4/openvswitch.m4 > > @@ -640,7 +640,7 @@ AC_DEFUN([OVS_CHECK_UNBOUND], > > > > dnl Checks for libunwind. > > AC_DEFUN([OVS_CHECK_UNWIND], > > - [AC_CHECK_LIB(unwind, unw_backtrace, [HAVE_UNWIND=yes], [HAVE_UNWIND=no]) > > + [AC_CHECK_HEADERS([libunwind.h], [HAVE_UNWIND=yes], [HAVE_UNWIND=no]) > > It might be wise to check for both, e.g.: > > AC_CHECK_LIB([unwind], [unw_backtrace], > [AC_CHECK_HEADERS([libunwind.h], [HAVE_UNWIND=yes], [HAVE_UNWIND=no])], > [HAVE_UNWIND=no]) >
Hi Ben, In most distros, libunwind-devel (or libunwind-dev) depends on libunwind. Is it necessary for us to check both? Thanks, -Yi-Hung _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
