* configure.ac: Accept --with-system-readline.

(READLINE, READLINE_DEPS, READLINE_CFLAGS): Define and substitute.
	* configure: Regenerate.
	* Makefile.in (READLINE, READLINE_DEPS, READLINE_CFLAGS): Use
	substituted values.
	(CDEPS): Use $(READLINE_DEPS) instead of $(READLINE).

gdb/configure

@@ -313,7 +313,7 @@ ac_includes_default="\
 ac_subdirs_all="$ac_subdirs_all gdbtk"
 ac_subdirs_all="$ac_subdirs_all multi-ice"
 ac_subdirs_all="$ac_subdirs_all gdbserver"
-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 MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT localedir PACKAGE subdirs AWK INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN_S RANLIB ac_ct_RANLIB YACC AR ac_ct_AR DLLTOOL ac_ct_DLLTOOL WINDRES ac_ct_WINDRES MIG ac_ct_MIG HAVE_LIBEXPAT LIBEXPAT LTLIBEXPAT ALLOCA CONFIG_LDFLAGS TARGET_SYSTEM_ROOT TARGET_SYSTEM_ROOT_DEFINE WARN_CFLAGS WERROR_CFLAGS SER_HARDWIRE WIN32LIBS LIBGUI GUI_CFLAGS_X WIN32LDAPP TCL_VERSION TCL_MAJOR_VERSION TCL_MINOR_VERSION TCL_CC TCL_DEFS TCL_SHLIB_CFLAGS TCL_SHLIB_LD TCL_SHLIB_LD_LIBS TCL_SHLIB_SUFFIX TCL_DL_LIBS TCL_LD_FLAGS TCL_LD_SEARCH_FLAGS TCL_CC_SEARCH_FLAGS TCL_COMPAT_OBJS TCL_RANLIB TCL_BUILD_LIB_SPEC TCL_LIB_SPEC TCL_LIB_VERSIONS_OK TK_VERSION TK_DEFS TK_BUILD_INCLUDES TK_XINCLUDES TK_XLIBSW TK_BUILD_LIB_SPEC TK_LIB_SPEC TCLHDIR TKHDIR ITCLHDIR ITKHDIR ITCL_VERSION ITCL_DEFS ITCL_BUILD_INCLUDES ITCL_BUILD_LIB_SPEC ITCL_LIB_SPEC ITK_VERSION ITK_DEFS ITK_BUILD_INCLUDES ITK_BUILD_LIB_SPEC ITK_LIB_SPEC X_CFLAGS X_LDFLAGS X_LIBS TCL_DEPS TK_DEPS ITCLLIB ITCL_DEPS ITKLIB ITK_DEPS GDBTKLIBS GDBTK_CFLAGS GDBTK_SRC_DIR IGNORE_SIM IGNORE_SIM_OBS ENABLE_CFLAGS PROFILE_CFLAGS CONFIG_OBS CONFIG_DEPS CONFIG_SRCS CONFIG_ALL CONFIG_CLEAN CONFIG_INSTALL CONFIG_UNINSTALL target_subdir frags xm_h tm_h nm_h LIBICONV 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 MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT localedir PACKAGE subdirs AWK INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN_S RANLIB ac_ct_RANLIB YACC AR ac_ct_AR DLLTOOL ac_ct_DLLTOOL WINDRES ac_ct_WINDRES MIG ac_ct_MIG READLINE READLINE_DEPS READLINE_CFLAGS HAVE_LIBEXPAT LIBEXPAT LTLIBEXPAT ALLOCA CONFIG_LDFLAGS TARGET_SYSTEM_ROOT TARGET_SYSTEM_ROOT_DEFINE WARN_CFLAGS WERROR_CFLAGS SER_HARDWIRE WIN32LIBS LIBGUI GUI_CFLAGS_X WIN32LDAPP TCL_VERSION TCL_MAJOR_VERSION TCL_MINOR_VERSION TCL_CC TCL_DEFS TCL_SHLIB_CFLAGS TCL_SHLIB_LD TCL_SHLIB_LD_LIBS TCL_SHLIB_SUFFIX TCL_DL_LIBS TCL_LD_FLAGS TCL_LD_SEARCH_FLAGS TCL_CC_SEARCH_FLAGS TCL_COMPAT_OBJS TCL_RANLIB TCL_BUILD_LIB_SPEC TCL_LIB_SPEC TCL_LIB_VERSIONS_OK TK_VERSION TK_DEFS TK_BUILD_INCLUDES TK_XINCLUDES TK_XLIBSW TK_BUILD_LIB_SPEC TK_LIB_SPEC TCLHDIR TKHDIR ITCLHDIR ITKHDIR ITCL_VERSION ITCL_DEFS ITCL_BUILD_INCLUDES ITCL_BUILD_LIB_SPEC ITCL_LIB_SPEC ITK_VERSION ITK_DEFS ITK_BUILD_INCLUDES ITK_BUILD_LIB_SPEC ITK_LIB_SPEC X_CFLAGS X_LDFLAGS X_LIBS TCL_DEPS TK_DEPS ITCLLIB ITCL_DEPS ITKLIB ITK_DEPS GDBTKLIBS GDBTK_CFLAGS GDBTK_SRC_DIR IGNORE_SIM IGNORE_SIM_OBS ENABLE_CFLAGS PROFILE_CFLAGS CONFIG_OBS CONFIG_DEPS CONFIG_SRCS CONFIG_ALL CONFIG_CLEAN CONFIG_INSTALL CONFIG_UNINSTALL target_subdir frags xm_h tm_h nm_h LIBICONV LIBOBJS LTLIBOBJS'
 ac_subst_files='host_makefile_frag target_makefile_frag'
 
 # Initialize some variables set by options.
@@ -877,6 +877,7 @@ Optional Packages:
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-separate-debug-dir=path   Look for global separate debug info in this path LIBDIR/debug
   --with-libunwind            Use libunwind frame unwinding support
+  --with-system-readline  use installed readline library
   --with-gnu-ld           assume the C compiler uses GNU ld default=no
   --with-libexpat-prefix[=DIR]  search for libexpat in DIR/include and DIR/lib
   --without-libexpat-prefix     don't search for libexpat in includedir and libdir
@@ -5718,6 +5719,26 @@ echo "$as_me: error: no termcap library found" >&2;}
 fi
 
 
+# Check whether --with-system-readline or --without-system-readline was given.
+if test "${with_system_readline+set}" = set; then
+  withval="$with_system_readline"
+
+fi;
+
+if test "$with_system_readline" = yes; then
+  READLINE=-lreadline
+  READLINE_DEPS=
+  READLINE_CFLAGS=
+else
+  READLINE='$(READLINE_DIR)/libreadline.a'
+  READLINE_DEPS='$(READLINE)'
+  READLINE_CFLAGS='-I$(READLINE_SRC)/..'
+fi
+
+
+
+
+
       if test "X$prefix" = "XNONE"; then
     acl_final_prefix="$ac_default_prefix"
   else
@@ -24377,6 +24398,9 @@ s,@WINDRES@,$WINDRES,;t t
 s,@ac_ct_WINDRES@,$ac_ct_WINDRES,;t t
 s,@MIG@,$MIG,;t t
 s,@ac_ct_MIG@,$ac_ct_MIG,;t t
+s,@READLINE@,$READLINE,;t t
+s,@READLINE_DEPS@,$READLINE_DEPS,;t t
+s,@READLINE_CFLAGS@,$READLINE_CFLAGS,;t t
 s,@HAVE_LIBEXPAT@,$HAVE_LIBEXPAT,;t t
 s,@LIBEXPAT@,$LIBEXPAT,;t t
 s,@LTLIBEXPAT@,$LTLIBEXPAT,;t t