Add a check for the tclsh program needed by dejagnu. This can have weird

names that have version numbers in it so this macro, DJ_AC_PATH_TCLSH will
make the necessary checks. The makefile variable TCLSH is set to the path
found.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18382 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile.config.in

@@ -87,6 +87,7 @@ POD2HTML   := @POD2HTML@
 POD2MAN    := @POD2MAN@
 PYTHON     := @PYTHON@
 RUNTEST    := @RUNTEST@
+TCLSH      := @TCLSH@
 ZIP        := @ZIP@
 
 # Paths to miscellaneous programs we assume are present

autoconf/configure.ac

@@ -265,6 +265,7 @@ AC_PATH_PROG(POD2MAN,[pod2man],[true pod2man])
 AC_PATH_PROG(PYTHON,[python],[true python])
 AC_PATH_PROG(QMTEST,[qmtest],[true qmtest])
 AC_PATH_PROG(RUNTEST,[runtest],[true runtest])
+DJ_AC_PATH_TCLSH
 AC_PATH_PROG(ZIP,[zip],[true zip])
 
 dnl Determine if the linker supports the -R option.

autoconf/m4/path_tclsh.m4

@@ -0,0 +1,56 @@
+dnl This macro checks for tclsh which is required to run dejagnu. On some 
+dnl platforms (notably FreeBSD), tclsh is named tclshX.Y - this handles
+dnl that for us so we can get the latest installed tclsh version.
+dnl 
+AC_DEFUN([DJ_AC_PATH_TCLSH], [
+dirlist=".. ../../ ../../../ ../../../../ ../../../../../ ../../../../../../ ../
+../../../../../.. ../../../../../../../.. ../../../../../../../../.. ../../../..
+/../../../../../.."
+no_itcl=true
+AC_MSG_CHECKING(for the tclsh program)
+AC_ARG_WITH(tclinclude, [  --with-tclinclude       directory where tcl headers are], with_tclinclude=${withval})
+AC_CACHE_VAL(ac_cv_path_tclsh,[
+dnl first check to see if --with-itclinclude was specified
+if test x"${with_tclinclude}" != x ; then
+  if test -f ${with_tclinclude}/tclsh ; then
+    ac_cv_path_tclsh=`(cd ${with_tclinclude}; pwd)`
+  elif test -f ${with_tclinclude}/src/tclsh ; then
+    ac_cv_path_tclsh=`(cd ${with_tclinclude}/src; pwd)`
+  else
+    AC_MSG_ERROR([${with_tclinclude} directory doesn't contain tclsh])
+  fi
+fi
+])
+
+dnl next check in private source directory
+dnl since ls returns lowest version numbers first, reverse its output
+if test x"${ac_cv_path_tclsh}" = x ; then
+    dnl find the top level Itcl source directory
+    for i in $dirlist; do
+        if test -n "`ls -dr $srcdir/$i/tcl* 2>/dev/null`" ; then
+            tclpath=$srcdir/$i
+            break
+        fi
+    done
+
+    dnl find the exact Itcl source dir. We do it this way, cause there
+    dnl might be multiple version of Itcl, and we want the most recent one.
+    for i in `ls -dr $tclpath/tcl* 2>/dev/null ` ; do
+        if test -f $i/src/tclsh ; then
+          ac_cv_path_tclsh=`(cd $i/src; pwd)`/tclsh
+          break
+        fi
+    done
+fi
+
+dnl see if one is installed
+if test x"${ac_cv_path_tclsh}" = x ; then
+   AC_MSG_RESULT(none)
+   AC_PATH_PROG(tclsh, tclsh)
+else
+   AC_MSG_RESULT(${ac_cv_path_tclsh})
+fi
+TCLSH="${ac_cv_path_tclsh}"
+AC_SUBST(TCLSH)
+])
+

configure

@@ -476,7 +476,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS LLVM_COPYRIGHT subdirs build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS ARCH ENDIAN CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT ENABLE_OPTIMIZED JIT ENABLE_DOXYGEN LLVMGCCDIR CPP CXX CXXFLAGS ac_ct_CXX LEX LEXLIB LEX_OUTPUT_ROOT FLEX YACC BISON ifGNUmake LN_S DATE FIND GREP MKDIR MV PAX RANLIB ac_ct_RANLIB RM SED TAR INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA BZIP2 DOT DOXYGEN ETAGS GROFF GZIP POD2HTML POD2MAN PYTHON QMTEST RUNTEST ZIP EGREP INSTALL_LTDL_TRUE INSTALL_LTDL_FALSE CONVENIENCE_LTDL_TRUE CONVENIENCE_LTDL_FALSE LIBADD_DL ECHO AR ac_ct_AR STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ETAGSFLAGS ALLOCA MMAP_FILE LLVMGCC LLVMCC1 LLVMCC1PLUS SHLIBEXT LLVM_PREFIX LLVM_BINDIR LLVM_LIBDIR LLVM_DATADIR LLVM_DOCSDIR LLVM_ETCDIR LLVM_INCLUDEDIR LLVM_INFODIR LLVM_MANDIR LLVM_CONFIGTIME LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS LLVM_COPYRIGHT subdirs build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS ARCH ENDIAN CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT ENABLE_OPTIMIZED JIT ENABLE_DOXYGEN LLVMGCCDIR CPP CXX CXXFLAGS ac_ct_CXX LEX LEXLIB LEX_OUTPUT_ROOT FLEX YACC BISON ifGNUmake LN_S DATE FIND GREP MKDIR MV PAX RANLIB ac_ct_RANLIB RM SED TAR INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA BZIP2 DOT DOXYGEN ETAGS GROFF GZIP POD2HTML POD2MAN PYTHON QMTEST RUNTEST tclsh TCLSH ZIP EGREP INSTALL_LTDL_TRUE INSTALL_LTDL_FALSE CONVENIENCE_LTDL_TRUE CONVENIENCE_LTDL_FALSE LIBADD_DL ECHO AR ac_ct_AR STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ETAGSFLAGS ALLOCA MMAP_FILE LLVMGCC LLVMCC1 LLVMCC1PLUS SHLIBEXT LLVM_PREFIX LLVM_BINDIR LLVM_LIBDIR LLVM_DATADIR LLVM_DOCSDIR LLVM_ETCDIR LLVM_INCLUDEDIR LLVM_INFODIR LLVM_MANDIR LLVM_CONFIGTIME LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -1050,6 +1050,7 @@ Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-llvmgccdir       Location of LLVM GCC front-end
+  --with-tclinclude       directory where tcl headers are
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
   --with-pic              try to use only PIC/non-PIC objects [default=use
                           both]
@@ -5455,6 +5456,103 @@ else
 echo "${ECHO_T}no" >&6
 fi
 
+
+dirlist=".. ../../ ../../../ ../../../../ ../../../../../ ../../../../../../ ../
+../../../../../.. ../../../../../../../.. ../../../../../../../../.. ../../../..
+/../../../../../.."
+no_itcl=true
+echo "$as_me:$LINENO: checking for the tclsh program" >&5
+echo $ECHO_N "checking for the tclsh program... $ECHO_C" >&6
+
+# Check whether --with-tclinclude or --without-tclinclude was given.
+if test "${with_tclinclude+set}" = set; then
+  withval="$with_tclinclude"
+  with_tclinclude=${withval}
+fi;
+if test "${ac_cv_path_tclsh+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+if test x"${with_tclinclude}" != x ; then
+  if test -f ${with_tclinclude}/tclsh ; then
+    ac_cv_path_tclsh=`(cd ${with_tclinclude}; pwd)`
+  elif test -f ${with_tclinclude}/src/tclsh ; then
+    ac_cv_path_tclsh=`(cd ${with_tclinclude}/src; pwd)`
+  else
+    { { echo "$as_me:$LINENO: error: ${with_tclinclude} directory doesn't contain tclsh" >&5
+echo "$as_me: error: ${with_tclinclude} directory doesn't contain tclsh" >&2;}
+   { (exit 1); exit 1; }; }
+  fi
+fi
+
+fi
+
+
+if test x"${ac_cv_path_tclsh}" = x ; then
+        for i in $dirlist; do
+        if test -n "`ls -dr $srcdir/$i/tcl* 2>/dev/null`" ; then
+            tclpath=$srcdir/$i
+            break
+        fi
+    done
+
+            for i in `ls -dr $tclpath/tcl* 2>/dev/null ` ; do
+        if test -f $i/src/tclsh ; then
+          ac_cv_path_tclsh=`(cd $i/src; pwd)`/tclsh
+          break
+        fi
+    done
+fi
+
+if test x"${ac_cv_path_tclsh}" = x ; then
+   echo "$as_me:$LINENO: result: none" >&5
+echo "${ECHO_T}none" >&6
+   # Extract the first word of "tclsh", so it can be a program name with args.
+set dummy tclsh; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_tclsh+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $tclsh in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_tclsh="$tclsh" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_tclsh="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  ;;
+esac
+fi
+tclsh=$ac_cv_path_tclsh
+
+if test -n "$tclsh"; then
+  echo "$as_me:$LINENO: result: $tclsh" >&5
+echo "${ECHO_T}$tclsh" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+else
+   echo "$as_me:$LINENO: result: ${ac_cv_path_tclsh}" >&5
+echo "${ECHO_T}${ac_cv_path_tclsh}" >&6
+fi
+TCLSH="${ac_cv_path_tclsh}"
+
+
 # Extract the first word of "zip", so it can be a program name with args.
 set dummy zip; ac_word=$2
 echo "$as_me:$LINENO: checking for $ac_word" >&5
@@ -8100,7 +8198,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 8103 "configure"
+#line 8201 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10091,7 +10189,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 10094 "configure"' > conftest.$ac_ext
+  echo '#line 10192 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -10576,7 +10674,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:10579:" \
+echo "$as_me:10677:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -11633,11 +11731,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11636: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:11734: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:11640: \$? = $ac_status" >&5
+   echo "$as_me:11738: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -11876,11 +11974,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11879: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:11977: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:11883: \$? = $ac_status" >&5
+   echo "$as_me:11981: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -11936,11 +12034,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11939: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12037: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:11943: \$? = $ac_status" >&5
+   echo "$as_me:12041: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -14121,7 +14219,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 14124 "configure"
+#line 14222 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14219,7 +14317,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 14222 "configure"
+#line 14320 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -16412,11 +16510,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16415: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16513: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:16419: \$? = $ac_status" >&5
+   echo "$as_me:16517: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -16472,11 +16570,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16475: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16573: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16479: \$? = $ac_status" >&5
+   echo "$as_me:16577: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -17833,7 +17931,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 17836 "configure"
+#line 17934 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17931,7 +18029,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 17934 "configure"
+#line 18032 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -18768,11 +18866,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18771: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18869: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:18775: \$? = $ac_status" >&5
+   echo "$as_me:18873: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -18828,11 +18926,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18831: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18929: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:18835: \$? = $ac_status" >&5
+   echo "$as_me:18933: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -20867,11 +20965,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:20870: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:20968: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:20874: \$? = $ac_status" >&5
+   echo "$as_me:20972: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -21110,11 +21208,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21113: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21211: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:21117: \$? = $ac_status" >&5
+   echo "$as_me:21215: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -21170,11 +21268,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21173: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21271: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:21177: \$? = $ac_status" >&5
+   echo "$as_me:21275: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -23355,7 +23453,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 23358 "configure"
+#line 23456 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -23453,7 +23551,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 23456 "configure"
+#line 23554 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -30240,6 +30338,8 @@ s,@POD2MAN@,$POD2MAN,;t t
 s,@PYTHON@,$PYTHON,;t t
 s,@QMTEST@,$QMTEST,;t t
 s,@RUNTEST@,$RUNTEST,;t t
+s,@tclsh@,$tclsh,;t t
+s,@TCLSH@,$TCLSH,;t t
 s,@ZIP@,$ZIP,;t t
 s,@EGREP@,$EGREP,;t t
 s,@INSTALL_LTDL_TRUE@,$INSTALL_LTDL_TRUE,;t t