Add a configure option to enable lock elision and disable by default

[thirdparty/glibc.git] / configure.in

diff --git a/configure.in b/configure.in
index cc065dbfab8365c216cfa5dd5f1fccf4943018e7..cf118f8ffa3020fdbce27436e5aab945190f56d1 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -184,6 +184,15 @@ if test "$enable_stackguard_randomize" = yes; then
   AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
 fi
 
+AC_ARG_ENABLE([lock-elision],
+             AC_HELP_STRING([--enable-lock-elision[=yes/no]],
+                            [Enable lock elision for pthread mutexes and rwlocks by default]),
+             [enable_lock_elision=$enableval],
+             [enable_lock_elision=no])
+if test "$enable_lock_elision" = yes ; then
+  AC_DEFINE(ENABLE_LOCK_ELISION)
+fi
+
 dnl Generic infrastructure for drop-in additions to libc.
 AC_ARG_ENABLE([add-ons],
              AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],