# Checks for libraries.
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([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]))