2 dnl backtrace(), for userspace assertions. glibc has this directly in libc.
3 dnl FreeBSD and (sometimes) musl have it in a separate -lexecinfo. It's assumed
4 dnl that this will also get the companion function backtrace_symbols().
6 AC_DEFUN([ZFS_AC_CONFIG_USER_BACKTRACE], [
9 AC_SEARCH_LIBS([backtrace], [execinfo], [
10 AC_DEFINE(HAVE_BACKTRACE, 1, [backtrace() is available])
11 AC_SUBST([BACKTRACE_LIBS], ["$LIBS"])