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Author SHA1 Message Date
Craig Burley
a843efa0d4 Update to Netlib version of 1998-04-20 
From-SVN: r19877
 1998-05-19 10:52:03 +00:00
Dave Love
deec641e31 JCB: update email in header. 
From-SVN: r19876
 1998-05-19 10:50:55 +00:00
Dave Love
7b40ddbde5 Update to Netlib version of 1998-04-20 
From-SVN: r19875
 1998-05-19 10:45:44 +00:00
Dave Love
0063c7779b JCB updates. 
From-SVN: r19874
 1998-05-19 10:29:42 +00:00
Craig Burley
4a26588bfa version.h: Get rid of the overly large headers here too, as done in version.c. 
Fri Apr 17 17:18:04 1998  Craig Burley  <burley@gnu.org>
* version.h: Get rid of the overly large headers
here too, as done in version.c.

From-SVN: r19873
 1998-05-19 10:26:25 +00:00
Craig Burley
3896a0de4f Get rid of the overly large headers 
here too, as done in version.c.

From-SVN: r19872
 1998-05-19 10:25:05 +00:00
Craig Burley
bfe12babef on Mar 23 21:20:35 1998 Craig Burley <burley@gnu.org> 
on Mar 23 21:20:35 1998  Craig Burley  <burley@gnu.org>
* version.c: Reduce to a one-line file, like
gcc's version.c, since there's really no content
there.

From-SVN: r19871
 1998-05-19 10:23:53 +00:00
Craig Burley
583302e485 Reduce to a one-line file, like 
gcc's version.c, since there's really no content
there.

From-SVN: r19870
 1998-05-19 10:21:47 +00:00
J"orn Rennecke
6e684430f3 reload1.c (reload_reg_free_for_value_p): New function. 
* reload1.c (reload_reg_free_for_value_p): New function.
	(allocate_reload_reg, choose_reload_regs): Use it.

From-SVN: r19869
 1998-05-19 10:23:21 +01:00
Andrew MacLeod
7ecb5d27dc Fix logic on when to generate a new handler label 
From-SVN: r19868
 1998-05-19 09:05:27 +00:00
Kaveh R. Ghazi
487a6e06ce Warning Fixes: 
* Makefile.in (print-rtl.o): Depend on bitmap.h.
        (dbxout.o): Depend on toplev.h.
        ($(SCHED_PREFIX)sched.o): Likewise.
        ($(out_object_file)): Likewise for system.h and toplev.h.
        (cppmain.o): Depend on gansidecl.h.
        (cpplib.o): Likewise.
        (cpperror.o): Likewise.
        (cppexp.o): Likewise.
        (cpphash.o): Likewise.
        (cppalloc.o): Likewise.
        (fix-header.o): Depend on cpplib.h and cpphash.h.
        (scan-decls.o): Depend on gansidecl.h.
        * basic-block.h (free_regset_vector): Add prototype.
        * cccp.c (check_precompiled): Mark parameter `fname' with
        ATTRIBUTE_UNUSED.
        (do_assert): Likewise for `op' and `keyword'.
        (do_unassert): Likewise.
        (do_line): Likewise for `keyword'.
        (do_error): Likewise for `op' and `keyword'.
        (do_warning): Likewise.
        (do_ident): Likewise for `keyword'.
        (do_pragma): Likewise for `limit', `op' and `keyword'.
        (do_sccs): Likewise.
        (do_if): Likewise for `keyword'.
        (do_elif): Likewise.
        (do_else): Likewise.
        (do_endif): Likewise.
        * collect2.c (getenv): Remove redundant prototype.
        (collect_exit, collect_execute, dump_file): Likewise.
        (dump_list): Wrap prototype and definition in COLLECT_EXPORT_LIST.
        (dump_prefix_list): Hide prototype and definition.
        * sparc.c: Include toplev.h.
        (intreg_operand): Mark parameter `mode' with ATTRIBUTE_UNUSED.
        (symbolic_memory_operand): Likewise.
        (sp64_medium_pic_operand): Likewise.
        (data_segment_operand): Likewise.
        (text_segment_operand): Likewise.
        (splittable_symbolic_memory_operand): Likewise.
        (splittable_immediate_memory_operand): Likewise.
        (eq_or_neq): Likewise.
        (normal_comp_operator): Likewise.
        (noov_compare_op): Likewise.
        (v9_regcmp_op): Likewise.
        (v8plus_regcmp_op): Likewise.
        (extend_op): Likewise.
        (cc_arithop): Likewise.
        (cc_arithopn): Likewise.
        (small_int): Likewise.
        (uns_small_int): Likewise.
        (clobbered_register): Likewise.
        (legitimize_pic_address): Likewise.
        (delay_operand): Likewise.
        (sparc_builtin_saveregs): Remove unused variable `stdarg'.
        * sparc.h (order_regs_for_local_alloc, eligible_for_return_delay,
        sparc_issue_rate, v8plus_regcmp_p): Add prototypes.
        * sparc.md (cmpdi_v8plus): Add abort for default case in switch.
        * cppalloc.c: Include gansidecl.h.
        * cpperror.c: Include stdarg.h/varargs.h and gansidecl.h.
        (cpp_file_line_for_message): Mark parameter `pfile' with
        ATTRIBUTE_UNUSED.
        (v_cpp_message): New function.
        (cpp_message): Use it.  Also convert to variable arguments.
        (cpp_fatal): Likewise.
        (cpp_pfatal_with_name): Constify parameter `name'.
        * cppexp.c: Move gansidecl.h before cpplib.h.
        * cpphash.c: Likewise.
        * cpphash.h (hashf, delete_macro): Add prototypes.
        * cpplib.c: Include stdarg.h/varargs.h and move gansidecl.h before
        cpplib.h.  Don't include errno.h.
        (update_path): Add arguments to prototype.
        (cpp_fatal, cpp_file_line_for_message, cpp_message, delete_macro,
        cpp_print_containing_files): Remove redundant prototypes.
        (cpp_hash_cleanup, add_import, append_include_chain,
        make_assertion, path_include, initialize_builtins,
        initialize_char_syntax, finclude, validate_else, comp_def_part,
        lookup_import, redundant_include_p, is_system_include,
        read_name_map, read_filename_string, open_include_file,
        check_macro_name, compare_defs, compare_token_lists,
        eval_if_expression, change_newlines): Add prototype arguments.
        (hashf): Remove redundant prototype.
        (read_token_list, free_token_list, safe_read, xcalloc, savestring,
        conditional_skip, skip_if_group): Add prototype arguments.
        (fdopen): Remove redundant prototype.
        (do_define, do_line, do_include, do_undef, do_error, do_pragma,
        do_ident, do_if, do_xifdef, do_else, do_elif, do_endif, do_sccs,
        do_once, do_assert, do_unassert, do_warning): Add prototype arguments.
        (struct directive): Add prototype arguments to function pointer
        member `func'.
        (handle_directive): Add missing arguments to call to `do_line'.
        (do_include): Mark parameters `unused1' and `unused2' with
        ATTRIBUTE_UNUSED.
        (do_line): Likewise for `keyword' and new parameters `unused1' and
        `unused2'.
        (do_error): Likewise for `keyword'.
        (do_warning): Likewise.  Also add missing argument `pfile' in call
        to cpp_pedwarn.
        (do_once): Mark parameter `keyword', `unused1' and `unused2' with
        ATTRIBUTE_UNUSED.
        (do_ident): Likewise for `keyword', `buf' and `limit'.
        (do_pragma): Likewise.  Also add missing arguments in call to do_once.
        (do_sccs): Mark parameter `keyword', `buf' and `limit' with
        ATTRIBUTE_UNUSED.
        (do_if): Likewise for `keyword'.
        (do_elif): Likewise.
        (eval_if_expression): Likewise for `buf' and `length'.
        (do_xifdef): Likewise for `unused1' and `unused2'.
        (do_else): Likewise for `keyword', `buf' and `limit'.
        (do_endif): Likewise.
        (parse_name): Add missing argument `pfile' in call to cpp_pedwarn.
        (cpp_handle_options): Remove superfluous NULL argument in call to
        cpp_fatal.
        (cpp_handle_options): Likewise.
        (do_assert): Mark parameter `keyword', `buf' and `limit' with
        ATTRIBUTE_UNUSED.
        (do_unassert): Likewise.
        (cpp_print_file_and_line): Add missing argument `pfile' in call to
        cpp_file_line_for_message.
        (v_cpp_error): New function.
        (cpp_error): Use it. Also accept variable arguments.
        (v_cpp_warning): New function.
        (cpp_warning): Use it. Also accept variable arguments.
        (cpp_pedwarn): Accept variable arguments.
        (v_cpp_error_with_line): New function
        (cpp_error_with_line): Use it.  Accept variable arguments.
        (v_cpp_warning_with_line): New function.
        (cpp_warning_with_line): Use it.  Accept variable arguments.  Hide
        definition.
        (cpp_pedwarn_with_line): Accept variable arguments.
        (cpp_pedwarn_with_file_and_line): Likewise.
        (cpp_error_from_errno): Constify parameter `name'.  Add missing
        argument `pfile' in call to cpp_file_line_for_message.
        (cpp_perror_with_name): Constify parameter `name'.
        * cpplib.h: Define PARAMS() in terms of PROTO().
        (fatal): Remove redundant prototype.
        (cpp_error, cpp_warning, cpp_pedwarn, cpp_error_with_line,
        cpp_pedwarn_with_line, cpp_pedwarn_with_file_and_line,
        cpp_error_from_errno, cpp_perror_with_name, cpp_pfatal_with_name,
        cpp_fatal, cpp_message, cpp_pfatal_with_name,
        cpp_file_line_for_message, cpp_print_containing_files): Add
        arguments to prototypes.
        (scan_decls, cpp_finish): Add prototypes.
        * cppmain.c: Include gansidecl.h.
        (main): Remove unused variable `i'.
        * dbxout.c: Include toplev.h.
        * demangle.h (do_tlink, collect_execute, collect_exit,
        collect_wait, dump_file, file_exists): Add prototype.
        * dwarf2out.c (dwarf_type_encoding_name, decl_start_label): Hide
        prototype and definition.
        (gen_unspecified_parameters_die): Don't assign results of call to
        function new_die() to unused variable `parm_die'.
        (dwarf2out_line): Mark parameter `filename' with ATTRIBUTE_UNUSED.
        (dwarf2out_define): Likewise for `lineno' and `buffer'.
        * dwarfout.c (output_unsigned_leb128, output_signed_leb128): Hide
        prototype and definition.
        (output_die): Add prototype arguments to function pointer arg.
        (output_unspecified_parameters_die): Mark parameter `arg' with
        ATTRIBUTE_UNUSED.
        * except.c (output_exception_table_entry): Remove unused variable
        `eh_entry'.
        * except.h (expand_fixup_region_start, expand_fixup_region_end):
        Add prototypes.
        * expr.c (do_jump_by_parts_equality_rtx): Remove prototype.
        * expr.h (do_jump_by_parts_equality_rtx): Add prototype.
        * fix-header.c: Include stdarg.h/varargs.h, move gansidecl.h
        before cpplib.h, include cpphash.h, remove redundant prototype of
        cpp_fatal, don't define `const', add a prototype for `fatal'.
        (cpp_file_line_for_message): Add missing arguments `pfile'.
        (v_cpp_message): New function.
        (cpp_message): Use it.
        (v_fatal): New function.
        (fatal, cpp_fatal): Use it.
        (cpp_pfatal_with_name): Constify parameter `name'.
        * flow.c (free_regset_vector): Remove redundant prototype.
        * function.c (round_down): Wrap prototype and definition with
        macro ARGS_GROW_DOWNWARD.
        (record_insns): Wrap prototype and definition with
        defined (HAVE_prologue) || defined (HAVE_epilogue).
        * gansidecl.h (ATTRIBUTE_PRINTF_4, ATTRIBUTE_PRINTF_5): New macros.
        * gen-protos.c: Include gansidecl.h.
        (hashf): Don't make it static, constify parameter `name'.
        * genattrtab.c (check_attr_test): Change XEXP() to XSTR() to match
        specifier %s in calls to function `fatal'.
        * haifa-sched.c: Include toplev.h.
        (find_rgns): Remove unused variable `j'.
        * integrate.c (note_modified_parmregs): Mark parameter `x' with
        ATTRIBUTE_UNUSED.
        (mark_stores): Likewise.
        * jump.c (mark_modified_reg): Likewise.
        * output.h (insn_current_reference_address): Add prototype.
        (eh_frame_section): Likewise.
        * print-rtl.c: Include bitmap.h.
        * reload1.c (reload): Wrap variables `note' and `next' in macro
        PRESERVE_DEATH_INFO_REGNO_P.
        (forget_old_reloads_1): Mark parameter `ignored' with
        ATTRIBUTE_UNUSED.
        (choose_reload_regs): Remove unused variable `in'.
        (reload_cse_invalidate_mem): Mark parameter `ignore' with
        ATTRIBUTE_UNUSED.
        (reload_cse_check_clobber): Likewise.
        * rtl.h (expand_null_return, reg_classes_intersect_p): Add prototype.
        (mark_elimination): Fix typo in prototype.
        * scan-decls.c: Include gansidecl.h.
        * tree.h (using_eh_for_cleanups, supports_one_only): Add prototype.

From-SVN: r19867
 1998-05-19 08:42:48 +00:00
Kaveh R. Ghazi
77dc0938f7 Warning fixes: 
* Makefile.in (parse.o): Depend on toplev.h.
        * class.c (typecode_p): Remove prototype and definition.
        * cp-tree.h (currently_open_class, is_empty_class, member_p):
        Add prototype.
        * decl.c (push_overloaded_decl_top_level): Remove prototype and
        definition.
        * errfn.c (cp_error): Cast function pointer `error' to (errorfn *)
        in call to `cp_thing'.
        (cp_warning): Likewise for function pointer `warning'.
        * except.c (do_function_call): Remove prototype and definition.
        (call_eh_info): Wrap variable `t1' in macro NEW_EH_MODEL.
        * method.c (is_java_type): Add prototype and make it static.
        * parse.y: Include toplev.h.
        * pt.c (type_unification): Remove unused variable `arg'.
        (instantiate_decl): likewise for `save_ti'.
        * tree.c (propagate_binfo_offsets): Likewise for `base_binfos'.

From-SVN: r19866
 1998-05-19 07:19:17 +00:00
Jeff Law
12c45d894b Initial revision 
From-SVN: r19862
 1998-05-19 01:09:55 -06:00
Jason Merrill
18c32f6939 tweak 
From-SVN: r19860
 1998-05-18 22:53:39 -04:00
Jason Merrill
72e61a0705 init.c (build_member_call): Handle template_ids. 
* init.c (build_member_call): Handle template_ids.
	* parse.y (primary): Add global_scope template_id.

From-SVN: r19859
 1998-05-18 22:50:52 -04:00
Jason Merrill
88537ff2d0 decl2.c (get_sentry): Use end_temporary_allocation. 
* decl2.c (get_sentry): Use end_temporary_allocation.
	Don't declare permanent_obstack.

From-SVN: r19858
 1998-05-18 19:23:05 -04:00
Jeffrey A Law
c7fdfd49ac function.c (identify_blocks): Fix thinko when setting the block number for NOTE_INSN_BLOCK_END. 
* function.c (identify_blocks): Fix thinko when setting the
        block number for NOTE_INSN_BLOCK_END.

From-SVN: r19857
 1998-05-18 15:39:43 -06:00
Nick Clifton
f122eb7a03 Applied fixes from PR 15949 and 15047 
From-SVN: r19856
 1998-05-18 16:37:30 +00:00
Nick Clifton
53f2d03397 Undid previous delta to dbxout.c 
Added comment explaining why.

From-SVN: r19855
 1998-05-18 15:34:05 +00:00
Brendan Kehoe
a9f7d5a172 add error loc for original default arg 
From-SVN: r19854
 1998-05-18 10:51:47 -04:00
Richard Henderson
ead1705900 tree.h (TYPE_SIZE_UNIT): New. 
* tree.h (TYPE_SIZE_UNIT): New.
(struct tree_type): Add size_unit member.
* stor-layout.c (layout_type): Initialize it.
* expr.c (get_inner_reference) [ARRAY_REF]: Use it.
* tree.c (size_in_bytes, int_size_in_bytes): Likewise.

From-SVN: r19853
 1998-05-18 06:21:14 -07:00
Mark Mitchell
6d73fddc3f parse.y (.finish_new_placement): New non-terminal. 
* parse.y (.finish_new_placement): New non-terminal.
	(unary_expr, new_type_id): Use it.
	* parse.c: Regenerated.

From-SVN: r19852
 1998-05-18 12:28:30 +00:00
Brendan Kehoe
4a95fafeda pt.c (redeclare_class_template): Say where the original definition of the template-parameter's default argument... 
* pt.c (redeclare_class_template): Say where the original definition
	of the template-parameter's default argument appeared.

From-SVN: r19851
 1998-05-18 08:21:29 -04:00
Richard Earnshaw
069b95ce6d stor-layout.c (layout_record): Fix off-by-one error when checking length of the TYPE_BINFO vector. 
* stor-layout.c (layout_record): Fix off-by-one error when checking
	length of the TYPE_BINFO vector.

From-SVN: r19850
 1998-05-18 08:08:10 -04:00
Craig Burley
80afeb71a9 Make-lang.in (G77STAGESTUFF): Add g77.o, g77spec.o, and g77version.o. 
1998-05-18  Craig Burley  <burley@gnu.org>
	* Make-lang.in (G77STAGESTUFF): Add g77.o, g77spec.o,
	and g77version.o.
	(f77.clean): Add removal of g77.c, g77.o, g77spec.o,
	and g77version.o.
	(f77.distclean): Delete removal of g77.c.

From-SVN: r19849
 1998-05-18 11:23:15 +00:00
Craig Burley
9e538417cc (G77STAGESTUFF): Add g77.o, g77spec.o, 
and g77version.o.
(f77.clean): Add removal of g77.c, g77.o, g77spec.o,
and g77version.o.
(f77.distclean): Delete removal of g77.c.

From-SVN: r19848
 1998-05-18 11:18:41 +00:00
Dave Love
c39c7b34c4 Layout change. 
From-SVN: r19847
 1998-05-18 11:17:41 +00:00
Dave Love
1794ae47e3 Fix entries (JCB). 
From-SVN: r19846
 1998-05-18 11:10:31 +00:00
Nick Clifton
972a4adb7c Use TREE_ARG to compute the type of a function parameter passed in memory. 
From-SVN: r19845
 1998-05-18 11:02:18 +00:00
Craig Burley
ac549fc3fb com.c (ffecom_convert_narrow_, [...]): Be even more persnickety in checking for internal bugs. 
1998-05-18  Craig Burley  <burley@gnu.org>
	* com.c (ffecom_convert_narrow_, ffecom_convert_widen_):
	Be even more persnickety in checking for internal bugs.
	Also, if precision isn't changing, just return the expr.
	(ffecom_expr_): Add ltkt variable for clarity.
	* expr.c Use ffestrOther in place of ffeexprDotdot_.
	(ffeexpr_token_number_): Call
	ffeexpr_make_float_const_ to make an integer.
	(ffeexpr_make_float_const_): Handle making an integer.
	* intrin.c (ffeintrin_init_0): Distinguish between
	crashes on bad arg base and kind types.
	* Makefile.in (f/expr.c): Now depends on f/stamp-str.
	* str-ot.fin: Add more keywords for expr.c.
	* intdoc.c (dumpimp): Trivial fix.
	* stb.c (ffestb_R100110_): Fix an assertion.

From-SVN: r19844
 1998-05-18 10:53:27 +00:00
Craig Burley
b82e5380ec (ffestb_R100110_): Fix an assertion. 
From-SVN: r19843
 1998-05-18 10:49:39 +00:00
Dave Love
e75468d280 Layout change. 
From-SVN: r19842
 1998-05-18 10:47:05 +00:00
Craig Burley
9c46106359 (dumpimp): Trivial fix. 
From-SVN: r19841
 1998-05-18 10:37:18 +00:00
Craig Burley
09556ec9da Add more keywords for expr.c. 
From-SVN: r19840
 1998-05-18 10:31:39 +00:00
Craig Burley
1ae73f9f98 (f/expr.c): Now depends on f/stamp-str. 
From-SVN: r19839
 1998-05-18 10:31:00 +00:00
Craig Burley
e0263671d7 (ffeintrin_init_0): Distinguish between 
crashes on bad arg base and kind types.

From-SVN: r19838
 1998-05-18 10:29:07 +00:00
Craig Burley
5403eb3a7d (ffeexpr_token_number_): Call ffeexpr_make_float_const_ to make an integer. 
(ffeexpr_token_number_): Call
ffeexpr_make_float_const_ to make an integer.
(ffeexpr_make_float_const_): Handle making an integer.

From-SVN: r19837
 1998-05-18 10:28:21 +00:00
Craig Burley
270fc4e898 (ffecom_convert_narrow_, ffecom_convert_widen_): 
Be even more persnickety in checking for internal bugs.
Also, if precision isn't changing, just return the expr.
(ffecom_expr_): Add ltkt variable for clarity.

From-SVN: r19836
 1998-05-18 10:26:16 +00:00
Robert Lipe
76ead72b80 dwarfout.h, [...]: New files. 
* dwarfout.h, dwarf2out.h, dbxout.h, sdbout.h:  New files.
        Prototypes for externally used functions in respective C files.
        * dwarfout.c, dbxout.c, dwarf2out.c, sdbout.c, toplev,c,
        final.c: Include above files.
        * Makefile.in (toplev.o): Add dependency for above four headers.
        (final.o): Likewise.
        (dwarfout.o, dbxout.o, dwarf2out.o, sdbout.o): Depend on four
        respective header files.

From-SVN: r19835
 1998-05-18 07:11:42 +00:00
Jason Merrill
11d3633762 update 
From-SVN: r19834
 1998-05-18 00:51:07 -04:00
Jason Merrill
be1559e5b5 * call.c (build_over_call): Tweak empty class handling. 
From-SVN: r19833
 1998-05-18 00:28:54 -04:00
Jason Merrill
b77ead33d3 * decl.c (make_typename_type): Use currently_open_class. 
From-SVN: r19832
 1998-05-17 23:16:09 -04:00
Jason Merrill
e596622890 * class.c (instantiate_type): Don't abort on TREE_NONLOCAL_FLAG. 
From-SVN: r19831
 1998-05-17 23:03:44 -04:00
Jason Merrill
0d7e147bb3 update 
From-SVN: r19830
 1998-05-17 21:53:57 -04:00
Martin v. Löwis
95480b77a2 * class.c (finish_struct_1): Use OVL_CURRENT in error message. 
From-SVN: r19829
 1998-05-17 21:52:15 -04:00
Jeffrey A Law
7e71719699 Makefile.in (TARGET_TOOLPREFIX): No longer define. 
* Makefile.in (TARGET_TOOLPREFIX): No longer define.
        (AR_FOR_TARGET, RANLIB_FOR_TARGET): Define to use versions in
        the build tree if they exist.
        (AR, AR_FLAGS, OLDAR, OLDAR_FLAGS, RANLIB, RANLIB_TEST): Update
        appropriately.
        (objdir): Let configure substitute value.
        (FLOAT_H): Let configure select a pre-built version from the
        config subdir.
        * build-make (INSTALL_TARGET, ALL): Disable, no longer needed.
        * configure.in: Substitute for objdir.
	* cp/Makefile.in (program_transform_name, objdir): Define.

From-SVN: r19828
 1998-05-17 19:24:26 -06:00
Jeffrey A Law
88111b2691 Makefile.in (build_canonical, [...]): Let configure substitute values for these variables. 
* Makefile.in (build_canonical, host_canonical): Let configure
        substitute values for these variables.
        * configure.in: Substitute for build_canonical, host_canonical
        and target_subdir in generated Makefile.

From-SVN: r19827
 1998-05-17 18:48:07 -06:00
Jeffrey A Law
d8af60bf7f output.h (find_basic_blocks): Declare. 
* output.h (find_basic_blocks): Declare.
        (free_basic_block_vars, set_block_num, life_analysis): Likewise.

From-SVN: r19826
 1998-05-17 18:29:11 -06:00
Jeffrey A Law
b0ccd8de2a Makefile.in (BISON): Use bison from the build tree if it exists. 
* Makefile.in (BISON): Use bison from the build tree if it exists.
        (FLEX): Similarly.

From-SVN: r19825
 1998-05-17 18:23:16 -06:00
Nick Clifton
88117d44fd gcc.c (SWITCH_CURTAILS_COMPILATION): Definition. 
* gcc.c (SWITCH_CURTAILS_COMPILATION): Definition.
        (DEFAULT_SWITCH_CURTAILS_COMPILATION): True for options -S and -c.
        (process_command): If HAVE_EXECUTABLE_SUFFIX is defined then scan
        command line arguments to see if an executable is not being
        created, and if so - do not append the suffix.
        * tm.texi (SWITCH_CURTAILS_COMPILATION): Add description of new
        driver macro.

From-SVN: r19824
 1998-05-17 17:08:40 -06:00