Sync with gcc:
2008-04-18 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/35457
* configure.ac: Include override.m4.
* configure: Regenerate.
2008-04-18 Paolo Bonzini <bonzini@gnu.org>
* Makefile.tpl (restrap): Call `make all' using double-colon rules.
* Makefile.in: Regenerate.
2008-04-11 Eric B. Weddington <eweddington@cso.atmel.com>
* configure.ac: Do not build libssp for the AVR.
* configure: Regenerate.
config:
2008-04-18 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/35457
* override.m4: Add this. Make sure aclocal always picks it.
Add more lenient precious variable check, backported from
autoconf trunk.
PR bootstrap/32009
PR bootstrap/32161
* configure.ac (CFLAGS_FOR_TARGET, CXXFLAGS_FOR_TARGET): Compute here.
* configure: Regenerate.
* Makefile.def: Define stage_libcflags for all bootstrap stages.
* Makefile.tpl (BOOT_LIBCFLAGS, STAGE2_LIBCFLAGS, STAGE3_LIBCFLAGS,
STAGE4_LIBCFLAGS): New.
(CFLAGS_FOR_TARGET, CXXFLAGS_FOR_TARGET): Subst from autoconf, without
$(SYSROOT_CFLAGS_FOR_TARGET) and $(DEBUG_PREFIX_CFLAGS_FOR_TARGET).
(BASE_TARGET_EXPORTS): Append them here to C{,XX}FLAGS.
(EXTRA_TARGET_FLAGS): Append them here to {LIB,}C{,XX}FLAGS.
(configure-stage[+id+]-[+prefix+][+module+]): Pass stage_libcflags
for target modules. Don't export LIBCFLAGS.
(all-stage[+id+]-[+prefix+][+module+]): Pass stage_libcflags; pass
$(BASE_FLAGS_TO_PASS) where [+args+] was passed, and [+args+] after
the overridden CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
(invocations of `all'): Replace $(TARGET_FLAGS_TO_PASS) with
$(EXTRA_TARGET_FLAGS), $(FLAGS_TO_PASS) with $(EXTRA_HOST_FLAGS).
* Makefile.in: Regenerate.
config:
2008-02-20 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/32009
* mh-ppc-darwin (BOOT_CFLAGS): Reenable.
Sync with gcc:
2006-12-29 Paolo Bonzini <bonzini@gnu.org>
* configure.in: Reorganize recognition of languages. Add
--enable-stage1-languages. Show supported languages for the chosen
target rather than all recognized languages.
* configure: Regenerate.
2006-12-29 Paolo Bonzini <bonzini@gnu.org>
* Makefile.tpl (GCC_STRAP_TARGETS, all-prebootstrap): Remove.
* Makefile.in: Regenerate.
2006-12-29 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* configure.in: Warn that MPFR 2.2.0 is buggy.
* configure: Regenerate.
config:
2006-12-29 Paolo Bonzini <bonzini@gnu.org>
* acx.m4: Sync with gcc.
Sync with gcc:
2006-12-19 Paolo Bonzini <bonzini@gnu.org>
* configure.in: Remove "$build" case for powerpc-*-darwin* since
it only affects bootstrap and could be tested on "$host" as well.
* configure: Regenerate.
* config/mh-ppc-darwin: Add to the stage1 cflags here.
2006-12-19 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/29544
* Makefile.def (flags_to_pass): Add STAGE1_CHECKING.
(bootstrap_stage): Add STAGE1_CHECKING to stage1 configure flags,
move here comment from Makefile.tpl.
* Makefile.tpl: Move some definitions higher in the file.
(STAGE1_CHECKING): New.
* configure.in: Add --enable-stage1-checking.
* configure: Regenerate.
* Makefile.in: Regenerate.
2006-12-03 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* configure.in: Update error message for missing GMP/MPFR.
* configure: Regenerate.
2006-12-02 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* configure.in: Update MPFR version in error message.
* configure: Regenerate.
2006-11-26 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* configure.in (--with-mpfr-dir, --with-gmp-dir): Remove flags.
(--with-mpfr-include, --with-mpfr-lib, --with-gmp-include,
--with-gmp-lib): New flags.
* configure: Regenerate.
config:
2006-12-04 Eric Botcazou <ebotcazou@libertysurf.fr>
* tls.m4 (GCC_CHECK_TLS): Do not test TLS with static linking
if static linking doesn't even work.
* Makefile.tpl (clean-target-libgcc): Test for gcc Makefile presence.
(unstage): Test for stage_last presence.
PR bootstrap/29802
* Makefile.tpl (POSTSTAGE1_FLAGS_TO_PASS): Add HOST_SUBDIR in STAGE_PREFIX.
* Makefile.in: Regenerate.
* Makefile.tpl (configure-stageN-MODULE): Pass --with-build-libsubdir
for stages after the first.
* Makefile.in: Regenerate.
config:
2006-07-19 Paolo Bonzini <bonzini@gnu.org>
* acx.m4: Support --with-build-libsubdir and AC_SUBST
build_libsubdir.
Sync from gcc:
2006-06-06 David Ayers <d.ayers@inode.at>
PR libobjc/13946
* Makefile.def: Add dependencies for libobjc which boehm-gc.
* Makefile.in: Regenerate.
* configure.in: Add --enable-objc-gc at toplevel and have it
enable boehm-gc for Objective-C.
Remove target-boehm-gc from libgcj.
Add target-boehm-gc to target_libraries.
Add target-boehm-gc to noconfigdirs where ${libgcj}
is specified.
Assert that boehm-gc is supported when requested for Objective-C.
Only build boehm-gc if needed either for Java or Objective-C.
* configure: Regenerate.
2006-06-05 Paolo Bonzini <bonzini@gnu.org>
PR 27674
* Makefile.tpl (configure-[+prefix+][+module+],
all-[+prefix+][+module+]): Depend on stage_current if bootstrapping.
Remove rule to unstage bootstrapped modules.
(stage_current): New.
* Makefile.in: Regenerate.
2006-05-20 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
Andreas Tobler <a.tobler@schweiz.ch>
* configure.in: Enable libgcj for hppa*-hp-hpux11*.
* configure: Rebuilt.
Revert
2006-01-31 Richard Guenther <rguenther@suse.de>
Paolo Bonzini <bonzini@gnu.org>
* Makefile.def (target_modules): Add libgcc-math target module.
* configure.in (target_libraries): Add libgcc-math target library.
(--enable-libgcc-math): New configure switch.
* Makefile.in: Re-generate.
* configure: Re-generate.
PR bootstrap/25670
* Makefile.tpl ([+compare-target+]): Print explanation messages.
* Makefile.def (ADAFLAGS, BOOT_ADAFLAGS, LANGUAGES): New flags_to_pass.
* Makefile.tpl (BASE_FLAGS_TO_PASS): Support optional flags_to_pass.
(EXTRA_GCC_FLAGS): Remove ADAFLAGS, BOOT_ADAFLAGS, LANGUAGES,
BUILD_PREFIX, BUILD_PREFIX_1.
* configure.in: (BUILD_PREFIX, BUILD_PREFIX_1): Don't substitute.
* Makefile.def (bootstrap stage 1): Pass LIBCFLAGS too.
* Makefile.tpl (POSTSTAGE1_FLAGS_TO_PASS): Override LIBCFLAGS too.
* Makefile.tpl (configure-stage[+id+]-[+prefix+][+module+],
all-stage[+id+]-[+prefix+][+module+], : Use $(current_stage) instead
of `cat stage_current`. Always provide the `r' and `s' variables.
(clean-stage[+id+]-[+prefix+][+module+]): Likewise, and make it into
a single shell execution.
(configure-[+prefix+][+module+], all-[+prefix+][+module+]): For
bootstrapped modules, make the stage1 module if the build was not
started yet, else build the current stage.
(all-host, all-target): Omit bootstrapped modules (if bootstrapping).
(all-build, all-host, all-target, [+make_target+]-host,
[+make_target+]-target): Do not use \-continued lines.
(target modules): Depend on stage_last, not all-gcc, if bootstrapping.
(current_stage, restrap, stage_last): New.
* Makefile.in: Regenerate.
* configure: Regenerate.
Sync from gcc:
2006-01-04 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/24252
* Makefile.def (flags_to_pass): Add STAGE1_CFLAGS and STAGE1_LANGUAGES.
* Makefile.tpl (OBJDUMP): New.
(EXTRA_HOST_FLAGS): Add it.
(EXTRA_GCC_FLAGS): Remove flags already specified in flags_to_pass.
* Makefile.tpl (stage[+id+]-start, stage[+id+]-end): Do not try
to use symbolic links between directories. Avoid race conditions
or make them harmless.
* configure.in: Do not try to use symbolic links between directories.
* Makefile.def (LEAN): Pass.
* Makefile.tpl (LEAN): Define.
(stage[+id+]-start): Accept that the previous directory does not
exist, if the bootstrap is lean.
(stage[+id+]-bubble): Invoke lean bootstrap commands after
stage[+id+]-start. Use a makefile variable and an `if' instead of a
configure substitution.
([+compare-target+]): Likewise.
([+bootstrap-target+]-lean): New.
* configure.in: Remove lean bootstrap support from here.
* Makefile.in: Regenerate.
* configure: Regenerate.
2006-01-02 Andreas Schwab <schwab@suse.de>
* configure.in: When reconfiguring remove Makefile in
all stage directories.
* configure: Regenerate.
Revert Ada-related part of the previous change.
* Makefile.def (ADAFLAGS, BOOT_ADAFLAGS, ADAFLAGS_FOR_TARGET):
Do not pass.
* Makefile.tpl (BOOT_ADAFLAGS): Do not define.
* Makefile.in: Regenerate.
* configure.in: Do not include mt-ppc-aix target fragment.
* configure: Regenerate.
config:
2005-12-20 Paolo Bonzini <bonzini@gnu.org>
Revert Ada-related part of the previous change.
* mt-ppc-aix: Delete.
2005-12-05 Paolo Bonzini <bonzini@gnu.org>
Sync with gcc:
2005-12-05 Paolo Bonzini <bonzini@gnu.org>
* configure.in (CONFIGURED_BISON, CONFIGURED_YACC, CONFIGURED_M4,
CONFIGURED_FLEX, CONFIGURED_LEX, CONFIGURED_MAKEINFO): Remove
"CONFIGURED_" from the AC_CHECK_PROGS invocation. Move below.
Find in-tree tools if available.
(EXPECT, RUNTEST, LIPO, STRIP): Find them and substitute them.
(CONFIGURED_*_FOR_TARGET): Don't set nor substitute.
(*_FOR_TARGET): Set them with GCC_TARGET_TOOL.
(COMPILER_*_FOR_TARGET): New.
* Makefile.tpl (HOST_EXPORTS): Add *_FOR_TARGET symbols that gcc needs.
(BASE_TARGET_EXPORTS): Use COMPILER_*_FOR_TARGET symbols.
(CONFIGURED_*, USUAL_*): Remove.
(BISON, YACC, FLEX, LEX, M4, MAKEINFO, EXPECT, RUNTEST, LIPO,
STRIP): Use autoconf substitutions.
(COMPILER_AS_FOR_TARGET, COMPILER_LD_FOR_TARGET,
COMPILER_NM_FOR_TARGET): New.
(EXTRA_HOST_FLAGS): Pass LIPO and STRIP.
(all): Make all-host and all-target in parallel.
(do-[+make_target+], do-check, install, [+compare-target+]): Ensure
that $$r and $$s are set before invoking a recursive make.
(stage[+id+]-bubble): Likewise, and invoke the comparison at the end.
([+bootstrap-target+]): Inline most of the `all' target.
2005-11-29 Ben Elliston <bje@au.ibm.com>
* Makefile.tpl (clean-target-libgcc): Invoke clean-target-libgcc
from the gcc build directory.
* Makefile.in: Regenerate.
2005-11-29 Ben Elliston <bje@au.ibm.com>
* Makefile.def: Add new libdecnumber host_module. Make all-gcc
depend on all-libdecnumber.
* configure.in (host_libs): Include libdecnumber.
* Makefile.in: Regenerate.
* configure: Likewise.
2005-11-21 Kean Johnston <jkj@sco.com>
* config.sub, config.guess: Sync from upstream sources.
config:
2005-12-05 Paolo Bonzini <bonzini@gnu.org>
* acx.m4 (GCC_TARGET_TOOL): New.
* Makefile.tpl (CONFIGURE_GDB_TK, INSTALL_GDB_TK): New variables.
(configure-gdb, install-gdb): New rules.
* configure.in: Set CONFIGURE_GDB_TK and INSTALL_GDB_TK.
* Makefile.in, configure: Regenerated.
PR bootstrap/24297
* Makefile.tpl (do-[+make-target+], do-check, install,
stage[+id+]-bubble, [+compare-target+]): Ensure $$r and $$s
are set before recursing.
* Makefile.in: Regenerate.
PR bootstrap/22340
* configure.in (default_target): Remove.
* Makefile.tpl (all): Do not use prerequisites as subroutines
(all) [gcc-bootstrap]: Bootstrap gcc first if it was not done yet.
(do-[+make_target+], check, install, [+bootstrap_target+]): Do not
use prerequisites as subroutines.
(check-host, check-target): New.
(bootstrap configure & all targets): Do not use stage*-start
if the directory layout is already ok.
(non-bootstrap configure & all targets): Prepend a $(unstage).
(stage[+id+]-bubble): Do that here. Do not use NOTPARALLEL.
(NOTPARALLEL): Remove.
(unstage, stage variables): New variables.
(unstage, stage targets): Simply expand to those variables.
* configure: Regenerate.
* Makefile.in: Regenerate.
* Makefile.tpl (stage[+id+]-start): Iterate over target module as well.
(Dependencies): Consider target modules for bootstrap dependencies.
Make target bootstrap modules depend on each stage's gcc.
* Makefile.in: Regenerate.
* Makefile.tpl (BUILD_CONFIGARGS): Include --with-build-subdir.
(TARGET_CONFIGARGS): Include --with-target-subdir.
(configure, all): New macros. Use them throughout.
* Makefile.def: Remove libstdcxx_incdir, libsubdir, gxx_include_dir,
gcc_version, and gcc_version_trigger from set of flags to pass.
* Makefile.tpl: Remove definitions of above variables.
(config.status): Remove dependency on $(gcc_version_trigger).
* Makefile.in: Regenerate.
* configure.in: Do not reference config/gcc-version.m4 nor
config/gxx-include-dir.m4. Do not invoke TL_AC_GCC_VERSION nor
TL_AC_GXX_INCLUDE_DIR. Do not set gcc_version_trigger.
* configure: Regenerate.
config:
* gxx-include-dir.m4: In all substitutions, leave $(gcc_version)
to be expanded by the Makefile.
Sync from gcc.
2005-02-28 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/17383
* Makefile.def (target_modules): Remove "stage", now unnecessary.
* Makefile.tpl (HOST_SUBDIR): New substitution.
(STAGE_HOST_EXPORTS, EXPECT, HOST_LIB_PATH, USUAL_AR_FOR_TARGET,
USUAL_AS_FOR_TARGET, USUAL_DLLTOOL_FOR_TARGET, USUAL_GCC_FOR_TARGET,
USUAL_LD_FOR_TARGET, USUAL_NM_FOR_TARGET, USUAL_OBJDUMP_FOR_TARGET,
USUAL_RANLIB_FOR_TARGET, USUAL_WINDRES_FOR_TARGET): Use it.
(Host modules, Bootstrapped modules): Use it.
(Build modules, Target modules): Do not create symlink trees,
always configure out-of-srcdir.
(distclean): Try removing $(host_subdir) with rm before using rm -rf.
* configure.in (FLAGS_FOR_TARGET, CC_FOR_TARGET, GCJ_FOR_TARGET,
GFORTRAN_FOR_TARGET, CXX_FOR_TARGET, RAW_CXX_FOR_TARGET): Use
$(HOST_SUBDIR). Create a symlink for host_subdir.
* Makefile.in: Regenerate.
* configure: Regenerate.
Merged from libada-gnattools-branch:
2004-11-28 Nathanael Nerode <neroden@gcc.gnu.org>
* Makefile.def: Add gnattools as a module, depending on target-libada.
* Makefile.in: Regenerate.
* configure.in: Include gnattools in host_tools; disable it if ada
is disabled.
* configure: Regenerate.
config:
2005-02-28 Paolo Bonzini <bonzini@gnu.org>
PR bootstrap/17383
* acx.m4 (GCC_TOPLEV_SUBDIRS): Set HOST_SUBDIR if an in-src
gcc build is going.
PR bootstrap/17383
* Makefile.def (target_modules): Remove stage parameter,
it is always true now.
* Makefile.tpl (configure-build-[+module+],
configure-target-[+module+]): Always build symlink tree
for the directory and for include. BUILD_SUBDIR and
TARGET_SUBDIR cannot be . anymore.
* Makefile.in: Regenerate.
* Makefile.def (bootstrap stages): Add 'lean' parameter.
* Makefile.tpl (configure-stageN-*, all-stageN-*): Turned into
phony targets; do not generate timestamp files.
(distclean-stageN): Remove references to their timestamp files.
(restageN, touch-stageN): Remove.
(stageN-bubble): Rewritten.
(compare): Support lean bootstraps.
* Makefile.in: Regenerate.
* configure.in: Only warn when bootstrapping but
build != host or build != target. Support lean bootstraps.
* configure: Regenerate.
Sync from gcc:
2004-08-26 Phil Edwards <phil@codesourcery.com>
* configure.in: Give a better error message if GMP/MPFR are missing
and a language needing them has been requested.
* configure: Regenerated.
2004-08-25 Phil Edwards <phil@codesourcery.com>
* configure.in: Print a list of available language front-ends if
a requested one is missing. Tidy stray tab characters.
* configure: Regenerated.
* Makefile.in: Regenerate.
* configure: Regenerate.
* Makefile.def (bootstrap-stage): Rename extra_*_flags to
stage_*_flags.
* Makefile.tpl (configure-[+module+], all-[+module+]): Exit
for bootstrapped modules if toplevel bootstrap is going.
(GCC bootstrap): Generate per-stage targets for all bootstrapped
modules. Adjust for changes in Makefile.def. Enable several
rules even in non-bootstrap mode, just to avoid peppering the
template with unnecessary "@if/@endif gcc-bootstrap" pairs.
(stage-[+prev+]-bubble): Remove.
* Makefile.def (Dependencies): Depend on all-build-bison,
all-build-flex, all-build-byacc, all-build-texinfo, rather
than the host variations.
* Makefile.tpl (BUILD_DIR_PREFIX): Remove. Replace throughout
with BUILD_SUBDIR.
(BISON): Update for recent Bisons.
(YACC): Fix typo.
(cross): Depend on all-build.
(all): Do not depend on all-build.
(prebootstrap): Remove.
(dep-kind): Accept separate prefixes for MODULE and ON variables.
(Prebootstrap dependencies): Add them to the per-stage targets
and to all-prebootstrap.
* configure.in (build_configdirs): Always enable build_tools.
(BUILD_DIR_PREFIX): Remove.
* Makefile.def (gcc): Add target variable.
(gdb, expect, guile, tk, tix): Replace with_x with extra_make_flags.
* Makefile.tpl (Autogenerated `all-*' targets): Invoke $(TARGET-*)
in the recursive `make', instead of hardwiring `all'.
(Autogenerated TARGET-* variables): New.
* Makefile.def (bfd, opcodes, gcc, zlib): Mark as bootstrap module.
(bison, byacc, flex, texinfo): Do not mark as bootstrap module.
(Dependencies): New section.
* Makefile.tpl (Dependencies): Generate from Makefile.def.
(configure-target-[+module+]): Depend on maybe-all-gcc
(all-prebootstrap): New name of all-bootstrap. Changed throughout.
(toplevel profiledbootstrap): Fix dependencies.
* Makefile.in: Regenerate.
* Makefile.def (host-modules): Add gcc.
* Makefile.in: Regenerate.
* Makefile.tpl (sorry): New rule.
(configure-host, all-host, [+make_target+]-host, do-check,
install-host): Do not add gcc as a special case.
(host modules): Add a small special-casing for gcc. Export
extra_make_flags through the environment.
(maybe-configure-gcc, configure-gcc, maybe-all-gcc, all-gcc,
maybe-check-gcc, check-gcc, maybe-install-gcc, install-gcc,
other recursive targets for gcc): Remove.
(all, do-[+make_target+], do-check): Wrap between unstage and stage.
(stage, unstage): New rules.
(stage[+id+]-start, stage[+id+]-end, [+compare-target+],
distclean-stage[+id+]): Use stage_current.
([+bootstrap-target+], profiledbootstrap): Do not invoke manually
the stage*-start rules.
* configure.in: Add noconfigdirs for crx-*-*.
* configure: Regenerate.
2004-07-09 Loren J. Rittle <ljrittle@acm.org>
* configure.in: Build libmudflap by default on FreeBSD.
* configure: Regenerated.
2004-07-09 Mark Mitchell <mark@codesourcery.com>
* configure.in: Do not build libmudflap by default on non-GNU/Linux
systems.
* configure: Regenerated.
2004-07-08 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
PR target/16344
* Makefile.tpl (profiledbootstrap): Build runtime libraries with
feedback based compiler.
* Makefile.in: Rebuilt.
2004-07-05 Phil Edwards <phil@codesourcery.com>
* configure.in: Do not prepend $srcdir to /dev/null in
makefile fragments.
* configure: Regenerate.
* Makefile.def (build_modules): Add bison, byacc, flex,
m4, texinfo.
(flags_to_pass): Add FLEX.
* Makefile.tpl (BUILD_DIR_PREFIX, BASE_EXPORTS): New.
(BUILD_EXPORTS, HOST_EXPORTS, BASE_TARGET_EXPORTS): Include it.
(DEFAULT_YACC, USUAL_YACC, DEFAULT_LEX, USUAL_LEX, DEFAULT_M4,
DEFAULT_MAKEINFO): Remove.
(CONFIGURED_YACC, CONFIGURED_FLEX, CONFIGURED_BISON,
CONFIGURED_LEX, CONFIGURED_M4, CONFIGURED_MAKEINFO): Substitute.
(YACC, FLEX, BISON, LEX, M4, MAKEINFO): Define to look into
objdir or else use configured tool.
(all-build): New.
(all): Depend on it.
(Build module dependencies): Add.
* Makefile.in: Regenerate.
* configure.in: Better support for multiple build modules,
matching what is done for host/target modules. Do not look
for "plausible" locations of build tools if Canadian cross.
Use autoconf's AC_PROG_CC to find a C compiler. Define
BUILD_DIR_PREFIX. Look for flex, makeinfo and m4.
* configure: Regenerate.
* Makefile.tpl (touch-stage[+id+]): New.
(restage[+prev+]): Depend on touch-stage[+id+].
* Makefile.tpl (RECURSE_FLAGS_TO_PASS): New.
Use it throughout.
* Makefile.def: Add profile and feedback bootstrap stages.
Remove next field from bootstrap stages.
* Makefile.tpl (LN, LN_S): Substitute.
(stageN-start, stageN-end): Use double-colon rules, to
provide a hook for additional setup commands.
(distclean-stageN-gcc, restageN): Create dependencies from
[+prev+], not from [+next+].
(stageN-bubble): Add commands for successive stages from
[+prev+], using double-colon rules.
(all-stageN-gcc): Fix typo.
(stagefeedback-start, profiledbootstrap): New.
* Makefile.in: Regenerate.
* configure.in: Call ACX_PROG_LN.
* configure: Regenerate.
config/ChangeLog:
2004-06-09 Paolo Bonzini <bonzini@gnu.org>
* acx.m4 (ACX_PROG_LN): From gcc, modified to
accept a parameter.
* Makefile.tpl (all.normal): Rename to all.
(all): Replace with a rule to pick the default
target from configure.
(all-gcc, configure-gcc): Use conditionals to
do nothing when toplevel bootstrap is going on.
(GCC directory bootstrap) [gcc-bootstrap]: Disable.
(Toplevel bootstrap) [gcc-no-bootstrap]: Disable.
* configure.in: Support --enable-bootstrap.
* Makefile.def: Remove new- prefix from toplevel
bootstrap targets.
* Makefile.tpl: Likewise.
* Makefile.def: Add bootstrap_stage 4. Add bootstrap2
target.
* Makefile.tpl (Toplevel bootstrap): Pass $(BASE_FLAGS_TO_PASS)
$(RECURSE_FLAGS) to recursive invocation of make.
* Makefile.in: Regenerate.
* configure: Regenerate.
(STAGE_HOST_EXPORTS, BASE_TARGET_EXPORTS, RAW_CXX_TARGET_EXPORTS)
(NORMAL_TARGET_EXPORTS): New macros. Use them in all the recursive
targets.
* Makefile.in: Regenerate.
* Makefile.tpl: Whenever a recursive target is defined, wrap
it in a special @if/@endif block, and prepare its maybe
dependency in the @if/@endif block
* configure.in: Instead of writing maybe dependencies, remove
the @if/@endif statements, and remove the @if/@endif blocks
that remain.
* configure: Regenerate.
* Makefile.in: Regenerate.
