AC_ARG_ENABLE(boehm, [ --disable-boehm Disable the Boehm GC.], support_boehm=$enableval,support_boehm=${support_boehm:-yes})
AM_CONDITIONAL(SUPPORT_BOEHM, test x$support_boehm = xyes)
-AC_ARG_ENABLE(parallel-mark, [ --enable-parallel-mark Enables GC Parallel Marking], enable_parallel_mark=$enableval, enable_parallel_mark=$parallel_mark)
+AC_ARG_ENABLE(parallel-mark, [ --enable-parallel-mark Enables Boehm GC Parallel Marking], enable_parallel_mark=$enableval, enable_parallel_mark=$parallel_mark)
if test x$enable_parallel_mark = xyes; then
libgc_configure_args="$libgc_configure_args --enable-parallel-mark"
fi