Make scrollback history (HIST_SIZE) configurable

configure

@@ -872,6 +872,7 @@ enable_default_complete
 enable_arrow_keys
 enable_sigstop
 enable_terminal_bell
+enable_history
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1514,6 +1515,7 @@ Optional Features:
   --enable-arrow-keys            Enable ANSI arrow keys.
   --enable-sigstop               Enable SIGSTOP key.
   --enable-terminal-bell         Enable terminal bell on completion.
+  --enable-history=LINES         Enable scrollback history, default off.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -4555,13 +4557,13 @@ if test "${lt_cv_nm_interface+set}" = set; then :
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:4558: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:4560: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4561: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:4563: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4564: output\"" >&5)
+  (eval echo "\"\$as_me:4566: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -5767,7 +5769,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 5770 "configure"' > conftest.$ac_ext
+  echo '#line 5772 "configure"' > conftest.$ac_ext
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7297,11 +7299,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7300: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7302: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7304: \$? = $ac_status" >&5
+   echo "$as_me:7306: \$? = $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 other than the usual output.
@@ -7636,11 +7638,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7639: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7641: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7643: \$? = $ac_status" >&5
+   echo "$as_me:7645: \$? = $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 other than the usual output.
@@ -7741,11 +7743,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7744: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7746: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7748: \$? = $ac_status" >&5
+   echo "$as_me:7750: \$? = $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
@@ -7796,11 +7798,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7799: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7801: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7803: \$? = $ac_status" >&5
+   echo "$as_me:7805: \$? = $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
@@ -10180,7 +10182,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10183 "configure"
+#line 10185 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10276,7 +10278,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10279 "configure"
+#line 10281 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11105,6 +11107,22 @@ $as_echo "#define CONFIG_ANNOYING_NOISE /**/" >>confdefs.h
 fi
 
 
+# Default history size 1, i.e. disabled.
+let HIST_SIZE=1
+# Check whether --enable-history was given.
+if test "${enable_history+set}" = set; then :
+  enableval=$enable_history; let HIST_SIZE=$enableval
+fi
+
+if test $HIST_SIZE -lt 1; then
+   let HIST_SIZE=1
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HIST_SIZE $HIST_SIZE
+_ACEOF
+
+
 # Restore gnu89 inline semantics on gcc 4.3 and newer
 saved_cflags="$CFLAGS"
 CFLAGS="$CFLAGS -fgnu89-inline"