- AC_HELP_STRING([--enable-gprof], [enable GNU profiling support]),, enable_gprof="no")
-if test "x${enable_gprof}" != "xno"; then
+ AC_HELP_STRING([--enable-gprof], [enable GNU profiling support]),
+ [enable_gprof=$enableval], [enable_gprof=no])
+if test "$enable_gprof" = "yes"; then