Commit Graph

85 Commits

Author SHA1 Message Date
Hans-Peter Nilsson
5c2a352dcf configure.in (post-target): Use "$(topsrcdir)", not "$(srcdir)/..".
8
	* configure.in (post-target): Use "$(topsrcdir)", not "$(srcdir)/..".

From-SVN: r27836
1999-06-28 20:32:02 -06:00
Eric Raskin
a310f94892 * configure.in: Added DG/UX target fragment
From-SVN: r27294
1999-06-01 17:25:17 -06:00
Eric Raskin
95e888e677 * libio/dgux.mt: New file for DG/UX configuration of libio
From-SVN: r27248
1999-05-30 07:25:28 -06:00
Jeff Law
6de94858b9 libchill, libf2c, libobjc:
* configure.in (AC_PREREQ): Update to 2.13.
        (AC_EXEEXT): Call to find possible file extension.
        (compiler_name): Use.
        * configure: Regenerate.
libio, libstdc++
        * configure.in: Test for ${compiler_name}.exe as well.

From-SVN: r27050
1999-05-19 20:27:28 -06:00
Mark Kettenis
74c1118e9e * libioP.h: Only include libc-lock.h if _IO_MTSAFE_IO is defined.
From-SVN: r26980
1999-05-17 16:58:56 -06:00
Jason Merrill
d960c105fc configure.in (compiler_name): Don't do the skip-this-dir thing if we're reconfiguring.
* configure.in (compiler_name): Don't do the skip-this-dir thing
	if we're reconfiguring.

From-SVN: r26899
1999-05-12 04:39:23 -04:00
Nathan Sidwell
9939c435d2 * streambuf.h (ios::~ios): Use operator delete[] to remove _arrays.
From-SVN: r26691
1999-04-29 08:32:13 +00:00
Alexandre Oliva
ceff9b1445 Fixed some old ChangeLog entries I wrote before becoming aware of the GNU
coding standards.

From-SVN: r26679
1999-04-27 13:27:29 +00:00
Mumit Khan
edcc5d3c96 filedoalloc.c (_POSIX_SOURCE): Remove definition.
* filedoalloc.c (_POSIX_SOURCE): Remove definition.
        * fileops.c (_POSIX_SOURCE): Likewise.
        * iopopen.c (_POSIX_SOURCE): Likewise.
        * procbuf.cc (_POSIX_SOURCE): Likewise.
        * libioP.h (_POSIX_SOURCE): And define it here.
        * stdiostream.cc: Include libioP.h before others.

From-SVN: r26380
1999-04-12 12:27:53 -06:00
Geoffrey Noer
8df1d91ab8 * configure.in: Check cygwin*, not cygwin32*.
From-SVN: r26235
1999-04-06 21:27:25 -06:00
H.J. Lu
88101ab976 configure (gxx_include_dir): Removed.
* configure (gxx_include_dir): Removed.
	* configure.in (gxx_include_dir): Handle it.
	* Makefile.in: Likewise.
	* libio/configure.in (gxx_include_dir): Handle it.
	* libio/Makefile.in: Likewise.
	* libstdc++/configure.in (gxx_include_dir): Handle it.
	* libstdc++/Makefile.in: Likewise.

From-SVN: r26126
1999-04-02 07:17:49 -07:00
Mumit Khan
adbfd1de80 configure.in (EXEEXT): Define.
8
        * configure.in (EXEEXT): Define.
        (compiler_name): Use.

From-SVN: r25949
1999-03-24 14:44:22 -07:00
Alexandre Oliva
b48afaf700 * gen-params (CONFIG_NM): test ... -o ... is not portable
From-SVN: r25935
1999-03-23 23:58:21 +00:00
Franz Sirl
f24ab9a140 configure.in: Cleanup and add mh-*pic handling for arm, powerpc
Thu Mar 11 01:07:55 1999  Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
        * configure.in: Cleanup and add mh-*pic handling for arm, powerpc

From-SVN: r25690
1999-03-10 17:10:48 -07:00
H.J. Lu
f10a4de1a5 linuxlibc1.mt (MT_CFLAGS): Add -D_G_STDIO_USES_LIBIO -D_G_HAVE_WEAK_SYMBOL.
* config/linuxlibc1.mt (MT_CFLAGS): Add -D_G_STDIO_USES_LIBIO
	-D_G_HAVE_WEAK_SYMBOL.
	* genops.c: Add the proper weak alias if _G_STDIO_USES_LIBIO
	and _G_HAVE_WEAK_SYMBOL are defined.
	* iofclose.c: Likewise.
	* iofeof.c: Likewise.
	* ioferror.c: Likewise.
	* iogetc.c: Likewise.
	* ioputc.c: Likewise.
	* iovsprintf.c: Likewise.
	* iovsscanf.c: Likewise.

From-SVN: r25590
1999-03-04 17:19:16 -07:00
Mumit Khan
d25346e71f * gen-params (VTABLE_LABEL_PREFIX): Handle windows32.
From-SVN: r25130
1999-02-10 04:04:34 -07:00
H.J. Lu
ef616958ab Makefile.in (iostream.list): Remove dependency on stamp-picdir.
* Makefile.in (iostream.list): Remove dependency on
        stamp-picdir.
        ($(LIBIOSTREAM_DEP)): Depend on stamp-picdir.
        ($(LIBIO_FILES)): Similarly.
        * config.shared (all): Make $(PICDIR) concurrent.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r25012
1999-02-03 14:11:03 -07:00
Jeff Law
8b60653df4 Undo previous change. Ulrich wants the problem hanled differently.
From-SVN: r24918
1999-01-30 04:14:53 -07:00
Mumit Khan
53eae3acff * stdiostream.cc (_POSIX_SOURCE): Define.
From-SVN: r24915
1999-01-30 00:11:12 -07:00
Manfred Hollstein
71205e0b3f configure (skip-this-dir): Add handling for new shell script...
./ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure (skip-this-dir): Add handling for new shell script, which
	might be created by a sub-directory's configure to indicate, this particular
	directory is "unwanted".
	* Makefile.in ($(CONFIGURE_TARGET_MODULES)): Likewise.
./gcc/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (CONFIG_LANGUAGES): New macro taking all languages
	which can be configured.
	(LANGUAGES): Use $(CONFIG_LANGUAGES) instead of @all_languages@
	(Makefile): Pass actual LANGUAGES through the environment when
	re-configuring.
	(cstamp-h): Likewise.
	(config.status): Likewise.
	* configure.in (enable_languages): Add new configuration parameter
	"--enable-languages=lang1,lang2,...".
	(${srcdir}/*/config-lang.in): Change handling to configure only
	those directories, that the user might have enabled; default to
	"all" existing languages.
	* configure: Regenerate.
./libchill/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (compiler_name): Add check to detect if this
	language's compiler has been built.
	* configure: Regenerate.
./libf2c/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (compiler_name): Add check to detect if this
	language's compiler has been built.
	* configure: Regenerate.
./libio/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (compiler_name): Add check to detect if this
	language's compiler has been built.
./libobjc/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (compiler_name): Add check to detect if this
	language's compiler has been built.
	* configure: Regenerate.
./libstdc++/ChangeLog:1998-11-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (compiler_name): Add check to detect if this
	language's compiler has been built.

From-SVN: r23892
1998-11-26 01:48:34 +00:00
Alexandre Oliva
3babe36c37 config.shared (depend.new): delete libc-lock.h from dependencies, and fix _G_config.h -> $(_G_CONFIG_H) rule
* config.shared (depend.new): delete libc-lock.h from
	dependencies, and fix _G_config.h -> $(_G_CONFIG_H) rule
	* depend: Rebuilt.

From-SVN: r23008
1998-10-12 09:28:02 +00:00
Jeffrey A Law
e41887f1fc config.shared (depend.new): Fix typo.
* config.shared (depend.new): Fix typo.
        * depend: Rebuilt.

From-SVN: r22982
1998-10-10 18:53:50 -06:00
Manfred Hollstein
bdc82ef11c configure.in (INSTALLDIR): Fix comment about changing INSTALLDIR's value...
�
	* libio/configure.in (INSTALLDIR): Fix comment about changing INSTALLDIR's
	value; don't change its value if --enable-version-specific-runtime-libs
	has been specified.
	* libstdc++/Makefile.in (install): Initialize RELINSTALLDIR correctly
	even for multilib and cross configurations.
	* libstdc++/configure.in (INSTALLDIR): Don't change INSTALLDIR's init
	value if --enable-version-specific-runtime-libs has been specified.

From-SVN: r22352
1998-09-09 11:49:06 +00:00
H.J. Lu
14aa13f4c4 configure.in: Fix INSTALLDIR replacement for cross-compile.
�
	* configure.in: Fix INSTALLDIR replacement for cross-compile.

From-SVN: r22195
1998-09-02 14:09:22 -06:00
Lutz Wohlrab
4112dedc85 Makefile.in: Avoid assumptions about "tr" behaves when LANG is set to something other than...
* dbz/Makefile.in: Avoid assumptions about "tr" behaves when
        LANG is set to something other than English.

From-SVN: r22119
1998-08-30 15:30:22 -06:00
H.J. Lu
8549e27458 * config.shared: Set libsubdir.
From-SVN: r22112
1998-08-30 15:18:00 -06:00
Ulrich Drepper
e94bc5f266 (_IO_getline_info): Don't read anything for N==0.
From-SVN: r21973
1998-08-25 14:39:39 +00:00
Mark Mitchell
03d0f4af2d iomanip.h: Use __extension__ for `extern' explicit template instantiations.
* iomanip.h: Use __extension__ for `extern' explicit template
	instantiations.
	* sinst.cc: Don't explicitly instantiation string_char_traits<char>.
	* cinst.cc: Likewiwse, for complex<float>, complex<double>,
	complex<long double>.
	* extend.texi: Remove description of extension to explicit
	instantiation that is now endorsed by standard C++.
	* decl2.c (grok_array_decl): Add comment.
	(mark_used): Don't instantiate an explicit instantiation.
	* friend.c (make_friend_class): Remove bogus comment.  Fix check
	for partial specializations.
	* pt.c (check_explicit_specialization): Don't
	SET_DECL_EXPLICIT_INSTANTIATION here.
	(mark_decl_instantiated): Or here.
	(do_decl_instantiation): Do it here, instead.  Add checks for
	duplicate explicit instantiations, etc.  Tidy.
	(do_type_instantiation): Likewise.
	(instantiate_decl): Improve comments.  Complain about explicit
	instantiations where no definition is available.
	* cp-tree.h (ansi_null_node): Remove.
	* call.c (build_over_call): Warn about converting NULL to an
	arithmetic type.
	* cvt.c (build_expr_type_conversion): Likewise.  Use
	null_ptr_cst_p instead of expanding it inline.
	* decl.c (ansi_null_node): Remove.
	(init_decl_processing): Make null_node always have integral type.
	* except.c (build_throw): Warn about converting NULL to an
	arithmetic type.
	* lex.c (init_parse): Remove handling of ansi_null_node.
	* pt.c (type_unification_real): Don't convert NULL to void* type.
	* typeck.c (build_binary_op_nodefault): Fix NULL warnings.
	(convert_for_assignment): Warn about converting NULL to an
	arithmetic type.
	(convert_for_initialization): Likewise.

From-SVN: r21915
1998-08-23 12:47:24 +00:00
Ulrich Drepper
32f0e4a48f Update.
From-SVN: r21790
1998-08-17 12:32:54 +00:00
Andreas Jaeger
887e305815 libioP.h: Use __PMT in typedefs.
* libioP.h: Use __PMT in typedefs.
* strfile.h: Likewise.

From-SVN: r21610
1998-08-04 15:21:08 +00:00
Ulrich Drepper
68a4a14125 Update.
From-SVN: r20803
1998-06-29 18:06:37 +00:00
Ulrich Drepper
cb6abb6fd5 Update.
From-SVN: r20792
1998-06-29 11:45:33 +00:00
Manfred Hollstein
3a1c612c55 Makefile.in (install): Remove superfluous /include.
�
	* Makefile.in (install): Remove superfluous /include.

From-SVN: r20750
1998-06-27 05:24:19 +00:00
Manfred Hollstein
e4bfc27484 Makefile.in (BASE_FLAGS_TO_PASS): Add gcc_version_trigger.
a
egcs/ChangeLog:
1998-06-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (BASE_FLAGS_TO_PASS): Add gcc_version_trigger.
	(Makefile): Depend on $(gcc_version_trigger).
	* configure (gcc_version): Change default initializer to empty
	string.
	(gcc_version_trigger): New variable; pass this variable down
	to subdir configures to enable them checking gcc's version
	themselves. Emit make macros for both gcc_version vars.
	(topsrcdir): Initialize reliably.
	(recursion line): Remove --with-gcc-version=${gcc_version}.
egcs/gcc/ChangeLog:
1998-06-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (gcc_version, gcc_version_trigger): New macros.
	(version): Initialize from $(gcc_version).
	* configure.in (version): Rename to gcc_version.
	(gcc_version_trigger): New variable; call AC_SUBST for it and
	emit it into the generated config.status.
	* configure: Regenerate.
egcs/libf2c/ChangeLog.egcs:
1998-06-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (gcc_version_trigger): Add new macro.
	(config.status): Add dependency upon $(gcc_version_trigger).
	* configure.in (gcc_version_trigger): New variable; initialize
	using value from toplevel configure; add AC_SUBST for it.
	(gcc_version): Change initialization to use this new variable.
	* configure: Regenerate.
egcs/libio/ChangeLog:
1998-06-26  Manfred Hollstein  <manfred@s-direktnet.de>
	* config.shared (FLAGS_TO_PASS): Add gcc_version_trigger.
	(Makefile): Add dependency upon $(gcc_version_trigger).

From-SVN: r20735
1998-06-26 02:13:50 +00:00
Manfred Hollstein
c1c007c582 configure (enable_version_specific_runtime_libs): Implement new flag --enable-version-specific-runtime-libs which installs C++...
a
egcs/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure (enable_version_specific_runtime_libs): Implement new flag
	--enable-version-specific-runtime-libs which installs C++ runtime stuff in
	$(libsubdir); emit definition in each generated Makefile.
	(gxx_include_dir): Initialize depending on $enable_version_specific_runtime_libs.
egcs/gcc/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (gxx_include_dir): Initialize default value depending on
	new flag --enable-version-specific-runtime-libs; remove superfluous default
	initialization afterwards.
	* configure: Regenerate.
egcs/libio/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (install): Install _G_config.h depending on new flag
	--enable-version-specific-runtime-libs.
	* config/linux.mt (gxx_include_dir): Remove definition here as we use
	gcc's default anyway.
egcs/libstdc++/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (INSTALLDIR): Add comment to document the fact,
	this macro will be properly initialized at make's runtime.
	(install): Add initialization of INSTALLDIR depending on $(libsubdir)
	and ${enable_version_specific_runtime_libs}; use $${INSTALLDIR} shell variable
	instead of the $(INSTALLDIR) make macro.

From-SVN: r20691
1998-06-24 06:25:57 +00:00
Manfred Hollstein
e465514832 configure (gcc_version): Initialize properly depending on how and where configure is started.
�
egcs/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure (gcc_version): Initialize properly depending on
	how and where configure is started.
	(recursion line): Pass a --with-gcc-version=${gcc_version}
	to configures in subdirs.
egcs/libf2c/ChangeLog.egcs:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (version): Rename to gcc_version.
	* configure.in (version): Likewise.
	(gcc_version): Add code to use an option passed from parent configure.
	* configure: Regenerate.
egcs/libio/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* config.shared (FLAGS_TO_PASS): Add gcc_version.

From-SVN: r20688
1998-06-24 06:16:21 +00:00
Manfred Hollstein
8f53c0e2c7 configure (gcc_version): Add new variable describing the particular gcc version we're building.
�
egcs-19980619/ChangeLog
1998-06-19  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure (gcc_version): Add new variable describing the
	particular gcc version we're building.
	* Makefile.in (libsubdir): Add new macro for the directory
	in which the compiler finds executables, libraries, etc.
	(BASE_FLAGS_TO_PASS): Pass down gcc_version, target_alias
	and libsubdir.
egcs-19980619/gcc/ChangeLog
1998-06-19  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (installdirs): Loop over directories in $(libsubdir)
	creating probably missing ones, instead of single if statements.
egcs-19980619/libio/ChangeLog
1998-06-19  Manfred Hollstein  <manfred@s-direktnet.de>
	* config.shared (FLAGS_TO_PASS): Add libsubdir.

From-SVN: r20585
1998-06-19 05:42:20 +00:00
Andreas Schwab
8bc3afab6f Update.
From-SVN: r20330
1998-06-08 09:50:50 +00:00
Ulrich Drepper
49feb20cf7 Update.
From-SVN: r19962
1998-05-22 20:40:16 +00:00
H.J. Lu
f77cc4ccb1 * isgetline.cc (istream::get): Fix a typo.
From-SVN: r19314
1998-04-19 15:14:32 -06:00
Manfred Hollstein
299cd3c1d8 config.table: Make locating frag files failsafe even for the special case if...
�
	* config.table: Make locating frag files failsafe even for the
	special case if configuring and building in srcdir.
	* configure.in: Make locating frag files failsafe even for the
	special case if configuring and building in srcdir.

From-SVN: r18411
1998-03-05 00:28:11 +00:00
Andreas Schwab
3eaa4d3b4d Changes for _G_IO_IO_FILE_VERSION == 0x20001:
* libioP.h (_IO_showmanyc_t, _IO_SHOWMANYC, _IO_imbue_t,
	_IO_IMBUE): New definitions.
	(struct _IO_jump_t): Add __showmanyc and __imbue fields.
	(_IO_file_fopen): Add new fourth argument.
	* filebuf.cc (filebuf::open): Pass new fourth argument to
	_IO_file_fopen.
	* iolibio.h (_IO_freopen): Likewise.
	* streambuf.cc (streambuf::showmanyc, streambuf::imbue): New
	functions.
	* streambuf.h (_IO_wchar_t): Define to _G_wchar_t.
	(ios::fill): Remove casts.
	(struct streambuf): Add showmanyc and imbue members.
	* iostream.cc (ostream::operator<<(double n)) [__GLIBC_MINOR__ >=
	1]: Initialize new fields is_char of struct printf_info.
	(ostream::operator<<(long double n)) [__GLIBC_MINOR__ >= 1]:
	Likewise.

From-SVN: r18222
1998-02-24 13:09:55 -07:00
Jeff Law
2b63596afe configure.in: For *-*-cygwin32*, add a -I for winsup to both XCINCLUDES and XCXXINCLUDES.
* configure.in: For *-*-cygwin32*, add a -I for winsup to both
	XCINCLUDES and XCXXINCLUDES.
	* config.shared: Use ${host_includes} when setting CXXINCLUDES in
	the DOING_LIBGXX case.
	* Makefile.in (_G_config.h): Pass $(CINCLUDES) in CC and
	$(CXXINCLUDES) in CXX when running gen-params.
	* config.shared (THIS_FILE): Really found via TOLIBIO instead
	of TOLIBCXX, which is empty when configuring gperf.
	(LIBS): When linking gperf, find libstdc++ relative to TO_TOPDIR
	instead of hardcoded "../".

From-SVN: r18168
1998-02-22 09:31:03 -07:00
H.J. Lu
3c1493a855 linux.mt (IO_OBJECTS): Add iogetline.o.
* config/linux.mt (IO_OBJECTS): Add iogetline.o.
        * config/linuxlibc1.mt: Ditto.
        * iogetline.c (_IO_getline_info): Renamed from _IO_getline.
        (_IO_getline): Just call _IO_getline_info.
        * isgetline.cc (istream::getline, istream::get, _sb_readline):
        Call _IO_getline_info instead of _IO_getline and get the EOF
        information.
        * sbgetline.cc (streambuf::sgetline): Ditto.
        * libioP.h (_IO_getline_info): New declaration.
        * iogetline.c (_IO_getline): Handle the case when there is no
        buffer.

From-SVN: r18042
1998-02-17 13:54:12 -07:00
Krister Walfridsson
f3a5aedcbd fileops.c: #include <unistd.h>.
f
        * fileops.c: #include <unistd.h>.
        * ioprims.c: Likewise.

From-SVN: r17888
1998-02-12 16:56:18 -07:00
Mark Mitchell
9b713d5e50 iostream.cc (ostream::operator<<(long double)): Don't use labeled initializers.
* iostream.cc (ostream::operator<<(long double)): Don't use
	labeled initializers.

From-SVN: r17842
1998-02-10 19:35:01 -05:00
Manfred Hollstein
2d70ee201e config.shared (FLAGS_TO_PASS): Don't emit PICFLAG.
* config.shared (FLAGS_TO_PASS): Don't emit PICFLAG.
        (.c.o): Check value of enable_shared, not PICFLAG.
        (.C.o): Dito.
        (.cc.o): Dito.
        (stamp-picdir): Dito.

From-SVN: r17682
1998-02-05 17:34:27 -07:00
Jeff Law
f3e57cf831 Fix typo in hj's ChangeLog entry.
From-SVN: r17584
1998-02-01 16:06:22 -07:00
Andreas Schwab
54a60f6e25 iostream.cc (istream::operator>>(long double&)): Scan value into separate variable, in case long double is bigger than double.
* iostream.cc (istream::operator>>(long double&))
        [!_G_HAVE_LONG_DOUBLE_IO]: Scan value into separate variable, in
        case long double is bigger than double.
        (ostream::operator<<(double)) [_G_HAVE_PRINTF_FP]: Fix order of
        initializers of struct printf_info to match declaration order,
        to work around g++ bug.
        (ostream::operator<<(long double)) [_G_HAVE_PRINTF_FP]: Likewise.
        * gen-params: Add missing quotes.  Avoid useless use of command
        substitution.

From-SVN: r17582
1998-02-01 05:44:52 -07:00
H.J. Lu
2b0aa3c5b3 filebuf.cc (filebuf::open): Call _IO_file_open if _G_HAVE_IO_FILE_OPEN is 1.
* filebuf.cc (filebuf::open): Call _IO_file_open if
        _G_HAVE_IO_FILE_OPEN is 1.
        * libio.h (_IO_fpos64_t, _IO_off64_t): Defined if
        _G_IO_IO_FILE_VERSION == 0x20001.
        * libioP.h (_IO_file_open): New declaration.
        * libio.h (_IO_FILE, _IO_stdin_, _IO_stdout_, _IO_stderr_,
        _IO_seekoff, _IO_seekpos): Add support for libio in egcs 2.1.
        * libioP.h (_IO_seekoff_t, _IO_seekpos_t, _IO_seek_t,
        _IO_seekoff, _IO_seekpos, _IO_default_seekoff,
        _IO_default_seekpos, _IO_default_seek, _IO_file_seekoff,
        _IO_file_seek, _IO_str_seekoff, _IO_pos_BAD, _IO_pos_as_off,
        _IO_pos_0): Ditto.
        * streambuf.h (streamoff, streampos): Ditto.
        * gen-params (__extension__): Use only if gcc version >= 2.8.

From-SVN: r17580
1998-02-01 05:29:15 -07:00