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-rw-r--r--configure.ac5
1 files changed, 1 insertions, 4 deletions
diff --git a/configure.ac b/configure.ac
index f0ce2a561..b31727381 100644
--- a/configure.ac
+++ b/configure.ac
@@ -514,10 +514,7 @@ AC_TYPE_SIZE_T
dnl Checks for library functions.
AC_FUNC_VPRINTF
-dnl XXX don't want to re-enable code that's been unused for years at this
-dnl point, but should offer good performance improvements, check after
-dnl 4.4.2.1...
-dnl AC_FUNC_MMAP
+AC_FUNC_MMAP
AC_CHECK_FUNCS(mtrace)
AC_CHECK_FUNCS(strndup)