Remove --enable-tunables configure option

And make always supported.  The configure option was added on glibc 2.25
and some features require it (such as hwcap mask, huge pages support, and
lock elisition tuning).  It also simplifies the build permutations.

Changes from v1:
 * Remove glibc.rtld.dynamic_sort changes, it is orthogonal and needs
   more discussion.
 * Cleanup more code.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

1 files changed, 0 insertions, 17 deletions

diff --git a/configure b/configure
index 904fc689e7..f84040644b 100755
--- a/configure
+++ b/configure
@@ -664,7 +664,6 @@ INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
 base_machine
-have_tunables
 build_pt_chown
 build_nscd
 libc_cv_static_nss_crypt
@@ -780,7 +779,6 @@ enable_systemtap
 enable_build_nscd
 enable_nscd
 enable_pt_chown
-enable_tunables
 enable_mathvec
 enable_cet
 enable_scv
@@ -1448,8 +1446,6 @@ Optional Features:
   --disable-build-nscd    disable building and installing the nscd daemon
   --disable-nscd          library functions will not contact the nscd daemon
   --enable-pt_chown       Enable building and installing pt_chown
-  --enable-tunables       Enable tunables support. Known values are 'yes',
-                          'no' and 'valstring'
   --enable-mathvec        Enable building and installing mathvec [default
                           depends on architecture]
   --enable-cet            enable Intel Control-flow Enforcement Technology
@@ -3658,19 +3654,6 @@ if test "$build_pt_chown" = yes; then
 
 fi
 
-# Check whether --enable-tunables was given.
-if test "${enable_tunables+set}" = set; then :
-  enableval=$enable_tunables; have_tunables=$enableval
-else
-  have_tunables=yes
-fi
-
-
-if test "$have_tunables" = yes; then
-  $as_echo "#define HAVE_TUNABLES 1" >>confdefs.h
-
-fi
-
 # The abi-tags file uses a fairly simplistic model for name recognition that
 # can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu.  So we mutate a
 # $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell.