1dnl 2dnl backtrace(), for userspace assertions. glibc has this directly in libc. 3dnl FreeBSD and (sometimes) musl have it in a separate -lexecinfo. It's assumed 4dnl that this will also get the companion function backtrace_symbols(). 5dnl 6AC_DEFUN([ZFS_AC_CONFIG_USER_BACKTRACE], [ 7 AX_SAVE_FLAGS 8 LIBS="" 9 AC_SEARCH_LIBS([backtrace], [execinfo], [ 10 AC_DEFINE(HAVE_BACKTRACE, 1, [backtrace() is available]) 11 AC_SUBST([BACKTRACE_LIBS], ["$LIBS"]) 12 ]) 13 AX_RESTORE_FLAGS 14]) 15