AC_CHECK_LIB([popt], [poptGetNextOpt], POPT_LIBS="-lpopt",AC_MSG_ERROR([libpopt is required in order to compile LinuxTraceToolkit]) )
#AC_CHECK_LIB([m], [round], M_LIBS="-lm",AC_MSG_ERROR([Mathematical libraries are missing.]) )
+AC_CHECK_LIB([util], [forkpty], UTIL_LIBS="-lutil", AC_MSG_ERROR([libutil is
+required in order to compile LinuxTraceToolkit]))
# Checks for header files.
AC_HEADER_STDC
AC_SUBST(POPT_LIBS)
+AC_SUBST(UTIL_LIBS)
AC_SUBST(lttvlibdir)
AC_SUBST(lttvplugindir)
AC_SUBST(lttlibdir)