Make dss non-optional, and fix an "arena.<i>.dss" mallctl bug.
Make dss non-optional on all platforms which support sbrk(2).
Fix the "arena.<i>.dss" mallctl to return an error if "primary" or
"secondary" precedence is specified, but sbrk(2) is not supported.
diff --git a/configure.ac b/configure.ac
index b47d572..dc817e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -836,34 +836,22 @@
fi
AC_SUBST([enable_munmap])
-dnl Do not enable allocation from DSS by default.
-AC_ARG_ENABLE([dss],
- [AS_HELP_STRING([--enable-dss], [Enable allocation from DSS])],
-[if test "x$enable_dss" = "xno" ; then
- enable_dss="0"
-else
- enable_dss="1"
-fi
-],
-[enable_dss="0"]
-)
+dnl Enable allocation from DSS if supported by the OS.
+have_dss="1"
dnl Check whether the BSD/SUSv1 sbrk() exists. If not, disable DSS support.
AC_CHECK_FUNC([sbrk], [have_sbrk="1"], [have_sbrk="0"])
if test "x$have_sbrk" = "x1" ; then
if test "x$sbrk_deprecated" == "x1" ; then
AC_MSG_RESULT([Disabling dss allocation because sbrk is deprecated])
- enable_dss="0"
- else
- AC_DEFINE([JEMALLOC_HAVE_SBRK], [ ])
+ have_dss="0"
fi
else
- enable_dss="0"
+ have_dss="0"
fi
-if test "x$enable_dss" = "x1" ; then
+if test "x$have_dss" = "x1" ; then
AC_DEFINE([JEMALLOC_DSS], [ ])
fi
-AC_SUBST([enable_dss])
dnl Support the junk/zero filling option by default.
AC_ARG_ENABLE([fill],
@@ -1461,7 +1449,6 @@
AC_MSG_RESULT([xmalloc : ${enable_xmalloc}])
AC_MSG_RESULT([mremap : ${enable_mremap}])
AC_MSG_RESULT([munmap : ${enable_munmap}])
-AC_MSG_RESULT([dss : ${enable_dss}])
AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}])
AC_MSG_RESULT([tls : ${enable_tls}])
AC_MSG_RESULT([===============================================================================])