gcc/gcc
Kaveh R. Ghazi 13a8b496ce c4x.c (c4x_print_operand, [...]): Fix format specifier warnings.
* c4x.c (c4x_print_operand, c4x_print_operand_address): Fix format
	specifier warnings.

From-SVN: r66880
2003-05-16 20:49:42 +00:00
..
ada trans.c (tree_transform): Use location_t and input_location directly. 2003-05-03 16:43:17 +00:00
config c4x.c (c4x_print_operand, [...]): Fix format specifier warnings. 2003-05-16 20:49:42 +00:00
cp re PR c++/5388 (Incorrect message "operands to ?: have different types") 2003-05-15 18:25:51 -04:00
doc * doc/bugreport.texi, f/g77.texi: Remove most of the preface of the bug reporting section. 2003-05-16 09:02:19 -06:00
f * doc/bugreport.texi, f/g77.texi: Remove most of the preface of the bug reporting section. 2003-05-16 09:02:19 -06:00
fixinc Properly remove previous patch. 2003-05-10 13:31:13 -04:00
ginclude stddef.h: Provide C++ safe offsetof. 2003-04-22 12:28:51 +00:00
intl Makefile.in (.y.c): Only enable production rule when maintaining. 2003-03-14 21:36:28 +00:00
java diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
objc diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
po c-common.c: Include intl.h. 2003-03-22 03:28:39 +00:00
testsuite backport: re PR target/7434 ([x86_64] ICE in change_address_1, at emit-rtl.c:1934) 2003-05-16 21:35:43 +02:00
treelang Treelang fixes including built failures on PPC and others. 2003-05-09 21:43:54 +00:00
.cvsignore Add more cscope data files 2002-06-10 02:36:06 +00:00
ABOUT-GCC-NLS ABOUT-GCC-NLS: Remove reference to enquire... 2002-09-18 05:07:02 +00:00
ABOUT-NLS ABOUT-NLS: Follow spelling conventions. 2002-09-16 11:42:00 +00:00
COPYING
COPYING.LIB
ChangeLog c4x.c (c4x_print_operand, [...]): Fix format specifier warnings. 2003-05-16 20:49:42 +00:00
ChangeLog.0 ChangeLog: Follow spelling conventions. 2002-09-22 02:03:17 +00:00
ChangeLog.1 ChangeLog.1: Fix typos. 2002-10-28 14:07:45 +00:00
ChangeLog.2 ChangeLog: Follow spelling conventions. 2002-12-19 05:18:13 +00:00
ChangeLog.3 ChangeLog: Follow spelling conventions. 2002-09-22 02:03:17 +00:00
ChangeLog.4 ChangeLog: Follow spelling conventions. 2002-12-19 05:18:13 +00:00
ChangeLog.5 ChangeLog: Follow spelling conventions. 2002-12-19 05:18:13 +00:00
ChangeLog.6 ChangeLog.4: Fix typos. 2002-09-28 15:29:45 +00:00
ChangeLog.7 Fix typos. 2002-11-15 14:53:41 +01:00
ChangeLog.8 ChangeLog: Rotated last year's entries to... 2003-03-13 19:20:26 +00:00
ChangeLog.lib
FSFChangeLog
FSFChangeLog.10 ChangeLog.4: Fix typos. 2002-09-28 15:29:45 +00:00
FSFChangeLog.11 ChangeLog.1: Follow spelling conventions. 2002-09-26 12:29:45 +00:00
LANGUAGES LANGUAGES: Follow spelling conventions. 2002-09-27 12:48:07 +00:00
Makefile.in Makefile.in (LIBGCC_DEPS): Use $(srcdir) on gcov files 2003-05-14 15:29:10 +00:00
ONEWS re PR other/895 (top of ONEWS needs to be merged into EGCS release notes) 2003-03-29 11:35:07 +00:00
README-fixinc
README.Portability README.Portability: Move to a new section and obsolete K+R portability issues. 2003-04-19 15:53:44 +00:00
SERVICE
acconfig.h
aclocal.m4 aclocal.m4 (gcc_AC_EXAMINE_OBJECT, [...]): Delete. 2003-03-21 17:19:34 +00:00
alias.c alias.c (mark_constant_function): Check for constancy and purity even of void functions. 2003-04-23 02:47:41 +00:00
alloc-pool.c * alloc-pool.c (last_id): Put in ENABLE_CHECKING guards. 2003-05-12 21:26:11 +00:00
alloc-pool.h alloc-pool.h (ALLOC_POOL_ID_TYPE): New type. 2003-05-12 05:16:55 +00:00
attribs.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
basic-block.h Makefile.in (LIBGCC_DEPS): Add gcov headers. 2003-04-23 14:05:11 +00:00
bb-reorder.c * bb-reorder.c (find_traces_1_round): Fix comment typo. 2003-02-20 08:44:08 +00:00
bitmap.c hashtable.c (gcc_obstack_init): Delete this function and everything related to it. 2003-04-06 21:44:09 +00:00
bitmap.h bitmap.h (BITMAP_WORD): New typedef: fundamental storage type for bitmaps. 2003-01-25 10:21:22 -08:00
builtin-attrs.def builtin-attrs.def (ATTR_NOTHROW_NONNULL_1, [...]): Renamed from ATTR_NONNULL_1, ATTR_NONNULL_2 and ATTR_NONNULL_3. 2003-05-04 22:18:17 +00:00
builtin-types.def builtins.def (BUILT_IN_BCOPY, [...]): New. 2003-04-28 14:10:35 +02:00
builtins.c builtins.c (readonly_data_expr): New function. 2003-05-08 13:45:38 +00:00
builtins.def builtin-attrs.def (ATTR_NOTHROW_NONNULL_1, [...]): Renamed from ATTR_NONNULL_1, ATTR_NONNULL_2 and ATTR_NONNULL_3. 2003-05-04 22:18:17 +00:00
c-aux-info.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
c-common.c re PR c++/689 ([diagnostic] this warning is not helpful: `class xxxx' only defines a private destructor and has no friend) 2003-05-11 12:47:42 +00:00
c-common.def tree.c (tree_size): For all 'c' and 'x' nodes... 2003-04-07 06:03:17 +00:00
c-common.h c-common.h, [...]: Rename genrtl_decl_cleanup to genrtl_cleanup_stmt. 2003-04-20 22:58:28 +00:00
c-config-lang.in Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
c-convert.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
c-cppbuiltin.c c-cppbuiltin.c (c_cpp_builtins): Move __STDC_HOSTED__ into cpplib as it's a Standard Predefined Macro. 2003-05-11 13:43:36 +00:00
c-decl.c c-decl.c (duplicate_decls): Re-invoke make_decl_rtl if the old decl had instantiated DECL_RTL. 2003-05-13 22:40:12 -07:00
c-dump.c c-common.h (c_dump_tree), [...]): Change return type from 'int' to 'bool'. 2003-03-19 20:34:10 +00:00
c-errors.c input.h (lineno): Rename to ... 2003-05-01 16:13:36 +00:00
c-format.c input.h (lineno): Rename to ... 2003-05-01 16:13:36 +00:00
c-incpath.c c-incpath.c (add_standard_paths): Add both "translated" and non-translated header paths. 2003-03-26 09:53:23 +10:30
c-incpath.h c-incpath.c (remove_component_p, [...]): Move back to cppfiles.c. 2003-03-02 17:44:18 +00:00
c-lang.c Makefile.in (CRTSTUFF_CFLAGS): Add -fno-unit-at-a-time 2003-02-12 21:48:59 +00:00
c-lex.c input.h (lineno): Rename to ... 2003-05-01 16:13:36 +00:00
c-objc-common.c c-common.h (lang_statement_code_p): Remove declaration. 2003-04-10 08:07:13 +00:00
c-opts.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
c-parse.in re PR c/10675 (Compile time increases quadratically with struct size) 2003-05-11 20:25:38 -07:00
c-pch.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
c-ppoutput.c c-ppoutput.c (cb_include): Don't take a cpp_token. 2003-04-21 19:21:59 +00:00
c-pragma.c c-pragma.c (maybe_apply_renaming_pragma): Fix typo. 2003-04-29 14:16:48 +00:00
c-pragma.h coretypes.h (cpp_reader): Forward declare struct. 2003-01-28 23:26:28 +00:00
c-pretty-print.c tree.c (tree_size): For all 'c' and 'x' nodes... 2003-04-07 06:03:17 +00:00
c-pretty-print.h alias.c: Fix comment typos. 2003-01-18 02:26:43 +00:00
c-semantics.c tree.h (STRIP_MAIN_TYPE_NOPS): New macro. 2003-05-13 14:58:56 -04:00
c-tree.h c-decl.c (struct binding_level): Add shadowed_tags and function_body... 2003-04-11 04:26:55 +00:00
c-typeck.c simd-6.c: New. 2003-05-05 20:31:45 +00:00
caller-save.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
calls.c emit-rtl.c (last_call_insn, [...]): New functions. 2003-05-03 10:25:22 -04:00
cfg.c cfg.c (unchecked_make_edge): New. 2003-03-10 12:59:12 +00:00
cfganal.c alias.c: Fix comment typos. 2003-01-18 02:26:43 +00:00
cfgbuild.c re PR c/10308 ([x86] ICE with -O -fgcse or -O2) 2003-04-24 15:53:22 +00:00
cfgcleanup.c cfgcleanup.c (merge_blocks): Fix return value. 2003-05-16 02:11:26 +00:00
cfglayout.c c-decl.c (struct binding_level): Add shadowed_tags and function_body... 2003-04-11 04:26:55 +00:00
cfglayout.h cfgloopanal.c: New file. 2003-01-24 20:27:02 +00:00
cfgloop.c basic-block.h (EDGE_IRREDUCIBLE_LOOP, [...]): New. 2003-03-05 22:05:18 +00:00
cfgloop.h basic-block.h (EDGE_IRREDUCIBLE_LOOP, [...]): New. 2003-03-05 22:05:18 +00:00
cfgloopanal.c cfgloopanal.c (num_loop_insns, [...]): Count only real insns. 2003-05-11 22:54:33 +00:00
cfgloopmanip.c calls.c: Fix comment formatting. 2003-03-08 01:38:27 +00:00
cfgrtl.c re PR middle-end/8866 (Bug in switch statement code generation -- missing label) 2003-04-22 16:17:46 -07:00
cgraph.c Makefile.in (cgraph.o): Depend on gt-cgraph.h and varray.h. 2003-03-08 18:24:22 +00:00
cgraph.h inline-3.c: New test. 2003-03-08 13:26:37 +00:00
cgraphunit.c cgraphunit.c (cgraph_create_edges): Drop walk_tree in favor of walk_tree_without_duplicates. 2003-05-12 09:46:25 +00:00
collect2.c re PR other/6955 (collect2 says "core dumped" when there is no core) 2003-03-30 19:01:58 +00:00
collect2.h Index: ChangeLog 2002-08-04 22:45:31 +00:00
combine.c combine.c (expand_compound_operation): Make sure that zero_extend operation is profitable. 2003-05-16 02:05:29 +00:00
conditions.h
config.gcc config.gcc: Purge all targets obsoleted in GCC 3.3. 2003-05-15 21:47:36 +00:00
config.guess
config.in configure.in: Check whether mbstowcs works. 2003-04-24 18:35:45 +00:00
configure configure.in (HAVE_AS_TLS): Add powerpc and powerpc64 tests. 2003-05-12 22:30:31 +00:00
configure.frag
configure.in configure.in (HAVE_AS_TLS): Add powerpc and powerpc64 tests. 2003-05-12 22:30:31 +00:00
conflict.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
convert.c convert.c (convert_to_real): Also optimize (float)log(x) into logf(x) where x is a float, i.e. 2003-02-19 03:39:30 +00:00
convert.h
coretypes.h coretypes.h (cpp_reader): Forward declare struct. 2003-01-28 23:26:28 +00:00
coverage.c gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
coverage.h coverage.h (coverage_counter_alloc): New function. 2003-05-11 19:21:32 +00:00
cppcharset.c * cppcharset.c (_cpp_valid_ucn): Cast field precision to int. 2003-04-21 14:06:12 +02:00
cppdefault.c Makefile.in (C_AND_OBJC_OBJS, [...]): Update. 2003-03-01 14:31:21 +00:00
cppdefault.h Makefile.in (C_AND_OBJC_OBJS, [...]): Update. 2003-03-01 14:31:21 +00:00
cpperror.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
cppexp.c c-lex.c (c_lex): Handle CPP_OTHER differently. 2003-04-22 19:28:00 +00:00
cppfiles.c c-cppbuiltin.c (c_cpp_builtins): Move __STDC_HOSTED__ into cpplib as it's a Standard Predefined Macro. 2003-05-11 13:43:36 +00:00
cpphash.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
cpphash.h c-ppoutput.c (cb_include): Don't take a cpp_token. 2003-04-21 19:21:59 +00:00
cppinit.c * cppinit.c (cpp_init_builtins): Use _cpp_define_builtin 2003-05-11 15:15:35 +00:00
cpplex.c cppinit.c (cpp_create_reader, [...]): Warn about trigraphs unless explicity set or -trigraphs. 2003-05-04 20:03:55 +00:00
cpplib.c cpplex.c (cpp_token_len): Tighten up. 2003-04-24 20:03:57 +00:00
cpplib.h c-cppbuiltin.c (c_cpp_builtins): Move __STDC_HOSTED__ into cpplib as it's a Standard Predefined Macro. 2003-05-11 13:43:36 +00:00
cppmacro.c cpplex.c (cpp_token_len): Tighten up. 2003-04-24 20:03:57 +00:00
cpppch.c cppfiles.c (ENABLE_VALGRIND_CHECKING, [...]): Remove. 2003-04-19 00:22:51 +00:00
cppspec.c Makefile.in: Update. 2003-03-11 06:42:21 +00:00
cpptrad.c cpptrad.c (_cpp_replacement_text_len): Add check for macro parameter count. 2003-04-22 12:52:51 -07:00
crtstuff.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
cse.c emit-rtl.c (last_call_insn, [...]): New functions. 2003-05-03 10:25:22 -04:00
cselib.c reload1.c (reload_cse_noop_set_p): Return false if mode of SET_DEST is not the same as that returned by... 2003-04-17 01:07:12 +00:00
cselib.h reload1.c (reload_cse_noop_set_p): Return false if mode of SET_DEST is not the same as that returned by... 2003-04-17 01:07:12 +00:00
cstamp-h.in
dbxout.c dbxout.c (print_int_cst_bounds_in_octal_p): New function, extracted from dbxout_type. 2003-04-14 18:06:07 -04:00
dbxout.h
dbxstclass.h
debug.c dbxout.c (scope_labelno): Add GTY. 2003-04-05 07:01:51 +00:00
debug.h dbxout.c (scope_labelno): Add GTY. 2003-04-05 07:01:51 +00:00
defaults.h defaults.h (GCOV_TYPE_SIZE): Remove. 2003-05-10 19:02:21 +00:00
df.c Makefile.in (df.o): Depend on alloc-pool.h, not obstack.h. 2003-04-05 20:13:20 +00:00
df.h 2003-03-20 Daniel Berlin <dberlin@dberlin.org> 2003-03-20 23:02:54 +00:00
diagnostic.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
diagnostic.def diagnostic.h (output_formatted_scalar): Rename from output_formatted_integer. 2002-08-12 18:34:51 +00:00
diagnostic.h diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
dojump.c * dojump.c (do_jump): Copy SUBREGs into a pseudo for comparison. 2003-03-30 23:07:27 +00:00
doloop.c cfgloopanal.c: New file. 2003-01-24 20:27:02 +00:00
dominance.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
doschk.c
dummy-conditions.c c-pch.c, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:48:31 +00:00
dwarf.h
dwarf2.h alias.c: Fix comment typos. 2003-01-18 02:26:43 +00:00
dwarf2asm.c Merge from pch-branch. 2003-01-10 02:22:34 +00:00
dwarf2asm.h ansidecl.h (ATTRIBUTE_NONNULL, [...]): New. 2003-03-17 22:57:27 +00:00
dwarf2out.c builtins.c (expand_builtin): Remove. 2003-05-03 22:22:51 -07:00
dwarf2out.h function.h (struct function): Rename profile_label_no. 2002-06-17 10:47:22 -07:00
dwarfout.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
emit-rtl.c emit-rtl.c (last_call_insn, [...]): New functions. 2003-05-03 10:25:22 -04:00
errors.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
errors.h emit-rtl.c: Likewise. 2002-06-03 01:13:17 +00:00
et-forest.c et-forest.c: Fix comment typos. 2003-01-17 14:24:24 +00:00
et-forest.h et-forest.c: Fix comment typos. 2003-01-17 14:24:24 +00:00
except.c except.c (EH_RETURN_STACKADJ_RTX): Do not define. 2003-05-10 22:59:04 +00:00
except.h except.c (EH_RETURN_STACKADJ_RTX): Do not define. 2003-05-10 22:59:04 +00:00
explow.c explow.c (round_push): Use HOST_WIDE_INT instead of int for the temporary used to round CONST_INT sizes. 2003-04-14 18:08:51 -04:00
expmed.c expmed.c (extract_bit_field): Reverse operands of && condition to prevent a potential division by zero in the... 2003-04-21 17:32:06 -04:00
expr.c expr.c (move_by_pieces): Honor the alignment of TO and FROM. 2003-05-13 14:15:20 -04:00
expr.h Mon May 12 11:32:53 CEST 2003 Jan Hubicka <jh@suse.cz> 2003-05-12 09:51:36 +00:00
final.c final.c (final_scan_insn): Apply the effects of frame-related delay slot insns before emitting a delayed... 2003-05-13 18:51:57 +00:00
fix-header.c c-cppbuiltin.c (c_cpp_builtins): Move __STDC_HOSTED__ into cpplib as it's a Standard Predefined Macro. 2003-05-11 13:43:36 +00:00
fixproto fixproto: Define NULL and size_t in generated stdlib.h and unistd.h. 2003-03-22 00:15:53 +00:00
flags.h except.c: Revert 04-01 and 04-02 forced-unwind changes. 2003-05-07 15:11:38 -07:00
flow.c emit-rtl.c (last_call_insn, [...]): New functions. 2003-05-03 10:25:22 -04:00
fold-const.c fold-const.c (fold_range_test): Use RANGE_TEST_NON_SHORT_CIRCUIT macro defaulting to original BRANCH_COST heuristic. 2003-04-22 11:01:18 -04:00
fp-test.c
function.c coverage.h (coverage_counter_alloc): New function. 2003-05-11 19:21:32 +00:00
function.h coverage.h (coverage_counter_alloc): New function. 2003-05-11 19:21:32 +00:00
future.options
gbl-ctors.h gbl-ctors.h: Add special license exception. 2003-04-22 17:21:04 +00:00
gcc.c re PR other/10658 (Change copyright year.) 2003-05-07 06:10:49 +00:00
gcc.h Makefile.in (TREE_H): Replace location.h with input.h. 2003-05-02 11:33:06 +00:00
gccbug.in * gccbug.in: Update. 2003-01-02 05:10:27 +00:00
gccspec.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gcov-dump.c gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
gcov-io.c gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
gcov-io.h gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
gcov-iov.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gcov.c gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
gcse.c re PR rtl-optimization/8705 ([HP-PA] ICE in emit_move_insn_1, at expr.c:3101) 2003-04-25 00:58:28 +00:00
gdbinit.in * gdbinit.in: Update to reflect new identifier structure. 2003-04-28 21:24:06 +00:00
gen-protos.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
genattr.c genattrtab.h (INSN_ALTS_FUNC_NAME): Move it from genautomata.c. 2003-01-20 22:49:33 +00:00
genattrtab.c [multiple changes] 2003-02-01 11:00:02 -08:00
genattrtab.h genattrtab.h, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:51:01 +00:00
genautomata.c genautomata.c (add_vect): Check undefined value for range type too. 2003-04-29 22:46:54 +00:00
gencheck.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gencodes.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
genconditions.c c-pch.c, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:48:31 +00:00
genconfig.c genconfig.c (main): Generate CC0_P. 2003-02-05 00:56:40 +00:00
genconstants.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
genemit.c dbxout.c (lastfile, cwd): Fix `unused' warning. 2003-01-16 15:37:57 +00:00
genextract.c c-cppbuiltin.c (builtin_define_with_value_n): Fix whitespace. 2003-03-15 13:43:33 +00:00
genflags.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gengenrtl.c * gengenrtl.c (gencode): Delete unnecessary rtl_obstack declaration. 2002-12-18 22:37:49 +00:00
gengtype-lex.l gengtype-lex.l (IWORD): Add CHAR_BITFIELD. 2003-04-03 15:42:16 +00:00
gengtype-yacc.y gengtype-yacc.y: Improve portability. 2003-04-29 18:51:38 +00:00
gengtype.c rtl.def (SYMBOL_REF): Add two 0 fields. 2003-04-11 14:15:36 -07:00
gengtype.h Index: gcc/ChangeLog 2002-09-16 18:33:23 +00:00
genmultilib * genmultilib: Use 'cd ./foo'. 2002-12-17 16:17:35 -05:00
genopinit.c optabs.h (enum optab_index): Add new OTI_pow and OTI_atan2. 2003-02-11 19:34:11 +00:00
genoutput.c * genoutput.c (output_get_insn_name): Handle NOOP_MOVE_INSN_CODE. 2003-02-07 14:39:49 -08:00
genpeep.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
genpreds.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
genrecog.c et-forest.c: Fix comment typos. 2003-01-17 14:24:24 +00:00
gensupport.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gensupport.h gensupport.c: Include hashtab.h. 2002-07-29 18:02:47 +00:00
ggc-common.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
ggc-none.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
ggc-page.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
ggc-simple.c * ggc-simple.c (debug_ggc_tree): Add PTR cast. 2003-01-25 10:25:14 -08:00
ggc.h cpppch.c (reset_ht): Remove. 2003-04-03 21:00:56 +00:00
glimits.h c-common.c (builtin_define_type_max): New. 2002-06-11 20:06:30 -07:00
global.c global.c (global_conflicts): Prevent allocation of call clobbered hard regs to pseudos live across abnormal... 2003-04-14 17:51:07 -04:00
gmon.c
graph.c diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
graph.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gstab.h
gsyms.h
gsyslimits.h
gthr-aix.h
gthr-dce.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gthr-gnat.c gthr-gnat.h, [...]: new sources for implementation of --enable-threads=gnat. 2003-04-22 17:52:04 -04:00
gthr-gnat.h gthr-gnat.h, [...]: new sources for implementation of --enable-threads=gnat. 2003-04-22 17:52:04 -04:00
gthr-posix.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gthr-rtems.h re PR bootstrap/9296 ([*-rtems] gthr-rtems regression) 2003-01-29 15:06:59 +00:00
gthr-single.h * gthr-single.h: Fix formatting. 2002-11-15 04:53:19 +00:00
gthr-solaris.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gthr-vxworks.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gthr-win32.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
gthr.h Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
haifa-sched.c c-cppbuiltin.c (builtin_define_with_value_n): Fix whitespace. 2003-03-15 13:43:33 +00:00
hard-reg-set.h loop.c (emit_prefetch_instructions): Do conversion at right place in RTL chain. 2003-01-31 23:34:17 +00:00
hashtable.c hashtable.c (gcc_obstack_init): Delete this function and everything related to it. 2003-04-06 21:44:09 +00:00
hashtable.h hashtable.c (gcc_obstack_init): Delete this function and everything related to it. 2003-04-06 21:44:09 +00:00
hooks.c tm.texi: Document TARGET_DWARF_REGISTER_SPAN. 2003-03-05 22:37:52 +00:00
hooks.h tm.texi: Document TARGET_DWARF_REGISTER_SPAN. 2003-03-05 22:37:52 +00:00
host-default.c Makefile.in (host_hook_obj): New. 2003-02-06 01:47:56 +00:00
hosthooks-def.h genattrtab.h, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:51:01 +00:00
hosthooks.h genattrtab.h, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:51:01 +00:00
hwint.h hwint.h: If the current compiler has no 64-bit type at all, make HOST_WIDEST_INT 32 bits. 2003-01-06 20:31:16 +00:00
ifcvt.c * ifcvt.c (noce_process_if_block): Fail on BLKmode move. 2003-04-14 17:44:36 -04:00
input.h Makefile.in (TREE_H): Replace location.h with input.h. 2003-05-02 11:33:06 +00:00
insn-addr.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
integrate.c rtl.h (TREE_CONSTANT_POOL_ADDRESS_P): Rename from DEFERRED_CONSTANT_P. 2003-05-14 10:44:01 -07:00
integrate.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
intl.c configure.in: Check whether mbstowcs works. 2003-04-24 18:35:45 +00:00
intl.h * intl.h: #define gcc_gettext_width to strlen when !ENABLE_NLS. 2003-04-12 23:07:34 +00:00
jump.c c-parse.in (if_stmt_locus): New object. 2003-05-09 09:25:34 +00:00
langhooks-def.h tree.c (tree_size): For all 'c' and 'x' nodes... 2003-04-07 06:03:17 +00:00
langhooks.c tree.c (tree_size): For all 'c' and 'x' nodes... 2003-04-07 06:03:17 +00:00
langhooks.h tree.c (tree_size): For all 'c' and 'x' nodes... 2003-04-07 06:03:17 +00:00
lcm.c c-cppbuiltin.c (builtin_define_with_value_n): Fix whitespace. 2003-03-15 13:43:33 +00:00
libfuncs.h libfuncs.h (LTI_setbits, [...]): New. 2003-04-11 12:45:32 -07:00
libgcc-std.ver except.c: Revert 04-01 and 04-02 forced-unwind changes. 2003-05-07 15:11:38 -07:00
libgcc2.c libgcc-std.ver (__clztf2): New. 2003-02-09 10:35:22 -08:00
libgcc2.h gbl-ctors.h: Add special license exception. 2003-04-22 17:21:04 +00:00
libgcov.c gcov-io.h (gcov_write_bytes, [...]): Remove here. 2003-05-14 16:01:20 +00:00
limitx.h
limity.h
line-map.c Various cleanups to help compile server. 2003-03-20 08:43:19 -08:00
line-map.h dbxout.c: Follow spelling conventions. 2002-09-22 14:09:34 +00:00
lists.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
local-alloc.c ifcvt.c: Fix comment typos. 2003-01-17 03:28:11 +00:00
longlong.h * longlong.h (umul_ppmm) [alpha]: Use __builtin_alpha_umulh. 2003-04-02 11:33:22 -08:00
loop-init.c Break out coverage routines to new file. 2003-04-21 19:48:10 +00:00
loop-unroll.c cfgloopanal.c (num_loop_insns, [...]): Count only real insns. 2003-05-11 22:54:33 +00:00
loop-unswitch.c basic-block.h (EDGE_IRREDUCIBLE_LOOP, [...]): New. 2003-03-05 22:05:18 +00:00
loop.c * loop.c (check_dbra_loop): Factor common test. 2003-05-14 15:06:41 +00:00
loop.h loop.h (REGNO_FIRST_LUID, [...]): Provide defaults for insns without luid. 2003-04-07 23:34:25 +00:00
machmode.def Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
machmode.h expr.c (emit_move_insn): Use SCALAR_FLOAT_MODE_P 2002-11-01 09:35:24 +00:00
main.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
mbchar.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
mbchar.h
mips-tdump.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
mips-tfile.c PR bootstrap/10051, PR bootstrap/10169. 2003-03-26 21:56:34 +00:00
mkconfig.sh Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
mkdeps.c Merge from pch-branch. 2003-01-10 02:22:34 +00:00
mkdeps.h Merge from pch-branch. 2003-01-10 02:22:34 +00:00
mkheaders.in Makefile.in (INSTALL_HEADERS): Add 'install-mkheaders'. 2002-05-27 04:24:54 +00:00
mkinstalldirs
mklibgcc.in Makefile.in (LIBGCC_DEPS): Use $(srcdir) on gcov files 2003-05-14 15:29:10 +00:00
mkmap-flat.awk
mkmap-symver.awk mkmap-symver.awk (BEGIN): Set sawsymbol false. 2002-11-27 12:00:14 -08:00
move-if-change
optabs.c optabs.c (expand_binop): In multi-word add cases, ensure XTARGET is copied to TARGET if they are different. 2003-04-15 09:06:58 -04:00
optabs.h optabs.h (enum optab_index): Add new OTI_pow and OTI_atan2. 2003-02-11 19:34:11 +00:00
output.h Mon May 12 11:32:53 CEST 2003 Jan Hubicka <jh@suse.cz> 2003-05-12 09:51:36 +00:00
params.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
params.def c-pragma.c (maybe_apply_renaming_pragma): Fix typo. 2003-04-29 14:16:48 +00:00
params.h params.def: Introduce parameter max-inline-insns-rtl for a separate limit for the RTL inliner. 2003-03-02 21:18:16 +00:00
predict.c Makefile.in (LIBGCC_DEPS): Add gcov headers. 2003-04-23 14:05:11 +00:00
predict.def builtins.def: Fix comment formatting. 2002-09-29 13:16:44 +00:00
predict.h
prefix.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
prefix.h
pretty-print.h diagnostic.h (output_formatted_scalar): Rename from output_formatted_integer. 2002-08-12 18:34:51 +00:00
print-rtl.c rtl.def (SYMBOL_REF): Add two 0 fields. 2003-04-11 14:15:36 -07:00
print-tree.c stmt.c (force_label_rtx): New function, based on logic formerly found in expand_expr. 2003-05-07 21:14:48 +00:00
profile.c coverage.h (coverage_counter_alloc): New function. 2003-05-11 19:21:32 +00:00
protoize.c dbxout.c (lastfile, cwd): Fix `unused' warning. 2003-01-16 15:37:57 +00:00
ra-build.c calls.c: Fix comment formatting. 2003-03-08 01:38:27 +00:00
ra-colorize.c c-cppbuiltin.c (builtin_define_with_value_n): Fix whitespace. 2003-03-15 13:43:33 +00:00
ra-debug.c c-cppbuiltin.c (builtin_define_with_value_n): Fix whitespace. 2003-03-15 13:43:33 +00:00
ra-rewrite.c * ra-rewrite.c (rewrite_program2): Initialize bb to avoid warning. 2003-01-22 19:40:08 +00:00
ra.c df.h (enum df_ref_flags.DF_REF_STRIPPED): New. 2003-03-07 22:06:16 +00:00
ra.h df.h (enum df_ref_flags.DF_REF_STRIPPED): New. 2003-03-07 22:06:16 +00:00
read-rtl.c collect2.c (ldgetname): Expand declaration to prototype. 2003-01-19 21:25:07 -05:00
real.c real.c (real_powi): New function to calculate the value of a real raised to an integer power, i.e. 2003-05-06 03:14:10 +00:00
real.h real.c (real_powi): New function to calculate the value of a real raised to an integer power, i.e. 2003-05-06 03:14:10 +00:00
recog.c sbitmap.c (sbitmap_resize): New function. 2003-02-18 19:35:08 +00:00
recog.h gcse.c (try_replace_reg): Use num_changes_pending. 2002-07-23 12:08:10 +00:00
reg-stack.c i386.md (logsf2, [...]): New patterns to implement log, logf and logl built-ins as inline x87 intrinsics. 2003-05-12 02:51:40 +00:00
regclass.c combine.c (gen_lowpart_for_combine): Update handling of subregs_of_mode 2003-02-28 10:11:47 +00:00
regmove.c regmove.c (optimize_reg_copy_1): Do not replace a hard register in an asm. 2003-02-22 03:17:24 +00:00
regrename.c regrename.c (struct du_chain): Use a bitfield for reg_class. 2003-04-10 05:24:26 +00:00
regs.h combine.c (gen_lowpart_for_combine): Update handling of subregs_of_mode 2003-02-28 10:11:47 +00:00
reload.c reload.c (find_reloads): Also check that all of a multi-reg value is in the class. 2003-05-01 20:53:45 -04:00
reload.h reload.c (reload_adjust_reg_for_mode): New function. 2003-03-04 05:54:39 +00:00
reload1.c reload1.c (reload_cse_move2add): Revert part of my 2003-05-09's patch. 2003-05-11 02:15:24 +00:00
reorg.c reorg.c (fill_slots_from_thread): When considering changing the insn following a reg-to-reg copy insn to use the... 2003-04-08 20:16:54 +00:00
resource.c regmove.c: Fix comment typos. 2002-12-24 08:30:34 +00:00
resource.h
rtl-error.c input.h (lineno): Rename to ... 2003-05-01 16:13:36 +00:00
rtl.c combine.c (distribute_notes): Kill REG_EXEC_COUNT. 2003-02-20 08:54:48 +00:00
rtl.def varasm.c (const_str_htab_hash, [...]): Kill. 2003-04-27 18:57:51 +00:00
rtl.h rtl.h (TREE_CONSTANT_POOL_ADDRESS_P): Rename from DEFERRED_CONSTANT_P. 2003-05-14 10:44:01 -07:00
rtlanal.c re PR middle-end/8866 (Bug in switch statement code generation -- missing label) 2003-04-22 16:17:46 -07:00
sbitmap.c calls.c: Fix comment formatting. 2003-03-08 01:38:27 +00:00
sbitmap.h sbitmap.c (sbitmap_resize): New function. 2003-02-18 19:35:08 +00:00
scan-decls.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
scan-types.sh
scan.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
scan.h * scan.h (lineno): Revert the rename here. 2003-05-01 19:24:14 +00:00
sched-deps.c sched-deps.c (reg_pending_barrier_mode): New enumeration. 2003-04-09 18:51:54 +00:00
sched-ebb.c sched-ebb.c (schedule_ebb): Supply the correct starting block number to save_line_notes. 2003-05-07 17:18:48 -07:00
sched-int.h sched-int.h (INSN_TRAP_CLASS, [...]): Move them from sched-rgn.c. 2003-02-25 20:40:57 +00:00
sched-rgn.c sched-int.h (INSN_TRAP_CLASS, [...]): Move them from sched-rgn.c. 2003-02-25 20:40:57 +00:00
sched-vis.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
sdbout.c dbxout.c (scope_labelno): Add GTY. 2003-04-05 07:01:51 +00:00
sdbout.h
sibcall.c regmove.c: Fix comment typos. 2002-12-24 08:30:34 +00:00
simplify-rtx.c simplify-rtx.c (simplify_relational_operation): Add case for ! (fabs(x) < 0.0). 2003-05-03 23:12:41 +00:00
sort-protos
sreal.c Makefile.in (sreal.o): Added. 2003-02-10 12:34:24 +00:00
sreal.h Makefile.in (sreal.o): Added. 2003-02-10 12:34:24 +00:00
ssa-ccp.c cfgbuild.c (make_edges): Use tablejump_p. 2003-03-30 12:46:57 -08:00
ssa-dce.c ssa-dce.c (EXECUTE_IF_UNNECESSARY): Verify INSN is an INSN_P before checking to see if it is dead. 2002-12-26 11:15:56 -07:00
ssa.c regmove.c: Fix comment typos. 2002-12-24 08:30:34 +00:00
ssa.h Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
stab.def builtins.def: Fix comment formatting. 2002-09-29 13:16:44 +00:00
stack.h
stmt.c stmt.c (emit_locus): New macro. 2003-05-08 17:09:09 +00:00
stor-layout.c stor-layout.c (compute_record_mode): Relax restriction on fields crossing word boundaries forcing BLKmode. 2003-05-04 18:04:51 -04:00
stringpool.c cpppch.c (reset_ht): Remove. 2003-04-03 21:00:56 +00:00
sys-protos.h
sys-types.h
system.h * system.h: Poison MACHINE_DEPENDENT_REORG. 2003-05-14 09:18:28 +00:00
target-def.h target-def.h (TARGET_MACHINE_DEPENDENT_REORG): Define. 2003-05-14 07:29:54 +00:00
target.h target-def.h (TARGET_MACHINE_DEPENDENT_REORG): Define. 2003-05-14 07:29:54 +00:00
timevar.c flags.h (time_report): Remove. 2003-04-26 15:19:06 +00:00
timevar.def objc-act.c: Include cgraph.h 2003-02-26 11:09:33 +00:00
timevar.h flags.h (time_report): Remove. 2003-04-26 15:19:06 +00:00
tlink.c Fixed calls to putenv(). 2003-04-22 12:44:06 +00:00
toplev.c target-def.h (TARGET_MACHINE_DEPENDENT_REORG): Define. 2003-05-14 07:29:54 +00:00
toplev.h diagnostic.c (output_format): Add support for %m. 2003-05-13 18:06:52 +00:00
tracer.c Makefile.in (LIBGCC_DEPS): Add gcov headers. 2003-04-23 14:05:11 +00:00
tree-dump.c tree-dump.c (dequeue_and_dump): Use CONSTRUCTOR_ELTS... 2003-05-09 11:37:08 -04:00
tree-dump.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
tree-inline.c c-decl.c (pending_invalid_xref_file): Remove. 2003-05-03 13:28:33 +00:00
tree-inline.h genattrtab.h, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:51:01 +00:00
tree.c tree.h (STRIP_MAIN_TYPE_NOPS): New macro. 2003-05-13 14:58:56 -04:00
tree.def update comments 2003-05-13 12:56:00 -04:00
tree.h tree.h (STRIP_MAIN_TYPE_NOPS): New macro. 2003-05-13 14:58:56 -04:00
tsystem.h gbl-ctors.h: Add special license exception. 2003-04-22 17:21:04 +00:00
typeclass.h
unroll.c re PR rtl-optimization/10171 (wrong code for inlined function) 2003-03-25 15:24:42 -05:00
unwind-dw2-fde-darwin.c unwind-dw2-fde-darwin.c (DESTRUCTOR_MAY_BE_CALLED_LIVE): New. 2003-04-01 21:02:25 +00:00
unwind-dw2-fde-glibc.c c-pch.c, [...]: Replace "GNU CC" with "GCC". 2003-03-13 03:48:31 +00:00
unwind-dw2-fde.c unwind-dw2-fde.c (__register_frame_info_bases): Check for null begin parameter (as well as pointer to null). 2003-04-18 18:43:28 -04:00
unwind-dw2-fde.h ChangeLog (configure.in): Don't include ansidecl.h in tconfig.h. 2003-01-24 01:46:50 +00:00
unwind-dw2.c unwind-dw2.c (uw_init_context_1): Don't pass &outer_cfa directly to _Unwind_SetGRPtr(). 2003-05-13 06:49:46 +00:00
unwind-libunwind.c * unwind-libunwind.c (_Unwind_FindEnclosingFunction): New. 2003-05-07 18:15:40 -07:00
unwind-pe.h unwind.h (_Unwind_Ptr): Make 64 bits on IA64 HP-UX. 2002-08-15 18:01:30 +00:00
unwind-sjlj.c except.c: Revert 04-01 and 04-02 forced-unwind changes. 2003-05-07 15:11:38 -07:00
unwind.h except.c: Revert 04-01 and 04-02 forced-unwind changes. 2003-05-07 15:11:38 -07:00
unwind.inc except.c: Revert 04-01 and 04-02 forced-unwind changes. 2003-05-07 15:11:38 -07:00
varasm.c rtl.h (TREE_CONSTANT_POOL_ADDRESS_P): Rename from DEFERRED_CONSTANT_P. 2003-05-14 10:44:01 -07:00
varray.c varray.c (element_size): Remove. 2003-02-13 00:41:28 +00:00
varray.h varray.c (element_size): Remove. 2003-02-13 00:41:28 +00:00
version.c Daily bump. 2003-05-16 00:16:07 +00:00
version.h system.h (GCCBUGURL): Delete. 2002-10-08 17:27:39 +00:00
vmsdbg.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
vmsdbgout.c dbxout.c (scope_labelno): Add GTY. 2003-04-05 07:01:51 +00:00
xcoffout.c Merge basic-improvements-branch to trunk 2002-12-16 18:23:00 +00:00
xcoffout.h dbxout.c (FORCE_TEXT): Switch to current_function_decl, not text_section. 2002-09-26 23:08:38 -04:00

README.Portability

Copyright (C) 2000, 2003 Free Software Foundation, Inc.

This file is intended to contain a few notes about writing C code
within GCC so that it compiles without error on the full range of
compilers GCC needs to be able to compile on.

The problem is that many ISO-standard constructs are not accepted by
either old or buggy compilers, and we keep getting bitten by them.
This knowledge until know has been sparsely spread around, so I
thought I'd collect it in one useful place.  Please add and correct
any problems as you come across them.

I'm going to start from a base of the ISO C89 standard, since that is
probably what most people code to naturally.  Obviously using
constructs introduced after that is not a good idea.

The first section of this file deals strictly with portability issues,
the second with common coding pitfalls, and the third with obsolete
K+R portability issues.


			Portability Issues
			==================

String literals
---------------

Some SGI compilers choke on the parentheses in:-

const char string[] = ("A string");

This is unfortunate since this is what the GNU gettext macro N_
produces.  You need to find a different way to code it.

Some compilers like MSVC++ have fairly low limits on the maximum
length of a string literal; 509 is the lowest we've come across.  You
may need to break up a long printf statement into many smaller ones.


Empty macro arguments
---------------------

ISO C (6.8.3 in the 1990 standard) specifies the following:

If (before argument substitution) any argument consists of no
preprocessing tokens, the behavior is undefined.

This was relaxed by ISO C99, but some older compilers emit an error,
so code like

#define foo(x, y) x y
foo (bar, )

needs to be coded in some other way.


free and realloc
----------------

Some implementations crash upon attempts to free or realloc the null
pointer.  Thus if mem might be null, you need to write

  if (mem)
    free (mem);


Trigraphs
---------

You weren't going to use them anyway, but some otherwise ISO C
compliant compilers do not accept trigraphs.


Suffixes on Integer Constants
-----------------------------

You should never use a 'l' suffix on integer constants ('L' is fine),
since it can easily be confused with the number '1'.


			Common Coding Pitfalls
			======================

errno
-----

errno might be declared as a macro.


Implicit int
------------

In C, the 'int' keyword can often be omitted from type declarations.
For instance, you can write

  unsigned variable;

as shorthand for

  unsigned int variable;

There are several places where this can cause trouble.  First, suppose
'variable' is a long; then you might think

  (unsigned) variable

would convert it to unsigned long.  It does not.  It converts to
unsigned int.  This mostly causes problems on 64-bit platforms, where
long and int are not the same size.

Second, if you write a function definition with no return type at
all:

  operate (int a, int b)
  {
    ...
  }

that function is expected to return int, *not* void.  GCC will warn
about this.

Implicit function declarations always have return type int.  So if you
correct the above definition to

  void
  operate (int a, int b)
  ...

but operate() is called above its definition, you will get an error
about a "type mismatch with previous implicit declaration".  The cure
is to prototype all functions at the top of the file, or in an
appropriate header.

Char vs unsigned char vs int
----------------------------

In C, unqualified 'char' may be either signed or unsigned; it is the
implementation's choice.  When you are processing 7-bit ASCII, it does
not matter.  But when your program must handle arbitrary binary data,
or fully 8-bit character sets, you have a problem.  The most obvious
issue is if you have a look-up table indexed by characters.

For instance, the character '\341' in ISO Latin 1 is SMALL LETTER A
WITH ACUTE ACCENT.  In the proper locale, isalpha('\341') will be
true.  But if you read '\341' from a file and store it in a plain
char, isalpha(c) may look up character 225, or it may look up
character -31.  And the ctype table has no entry at offset -31, so
your program will crash.  (If you're lucky.)

It is wise to use unsigned char everywhere you possibly can.  This
avoids all these problems.  Unfortunately, the routines in <string.h>
take plain char arguments, so you have to remember to cast them back
and forth - or avoid the use of strxxx() functions, which is probably
a good idea anyway.

Another common mistake is to use either char or unsigned char to
receive the result of getc() or related stdio functions.  They may
return EOF, which is outside the range of values representable by
char.  If you use char, some legal character value may be confused
with EOF, such as '\377' (SMALL LETTER Y WITH UMLAUT, in Latin-1).
The correct choice is int.

A more subtle version of the same mistake might look like this:

  unsigned char pushback[NPUSHBACK];
  int pbidx;
  #define unget(c) (assert(pbidx < NPUSHBACK), pushback[pbidx++] = (c))
  #define get(c) (pbidx ? pushback[--pbidx] : getchar())
  ...
  unget(EOF);

which will mysteriously turn a pushed-back EOF into a SMALL LETTER Y
WITH UMLAUT.


Other common pitfalls
---------------------

o Expecting 'plain' char to be either sign or unsigned extending

o Shifting an item by a negative amount or by greater than or equal to
  the number of bits in a type (expecting shifts by 32 to be sensible
  has caused quite a number of bugs at least in the early days).

o Expecting ints shifted right to be sign extended.

o Modifying the same value twice within one sequence point.

o Host vs. target floating point representation, including emitting NaNs
  and Infinities in a form that the assembler handles.

o qsort being an unstable sort function (unstable in the sense that
  multiple items that sort the same may be sorted in different orders
  by different qsort functions).

o Passing incorrect types to fprintf and friends.

o Adding a function declaration for a module declared in another file to
  a .c file instead of to a .h file.


			K+R Portability Issues
			======================

Unary +
-------

K+R C compilers and preprocessors have no notion of unary '+'.  Thus
the following code snippet contained 2 portability problems.

int x = +2;  /* int x = 2;  */
#if +1       /* #if 1  */
#endif


Pointers to void
----------------

K+R C compilers did not have a void pointer, and used char * as the
pointer to anything.  The macro PTR is defined as either void * or
char * depending on whether you have a standards compliant compiler or
a K+R one.  Thus

  free ((void *) h->value.expansion);

should have been written

  free ((PTR) h->value.expansion);

Further, an initial investigation indicates that pointers to functions
returning void were okay.  Thus the example given by "Calling
functions through pointers to functions" below appeared not to cause a
problem.


String literals
---------------

K+R C did not allow concatenation of string literals like

  "This is a " "single string literal".


signed keyword
--------------

The signed keyword did not exist in K+R compilers; it was introduced
in ISO C89, so you could not use it.  In both K+R and standard C,
unqualified char and bitfields may be signed or unsigned.  There is no
way to portably declare signed chars or signed bitfields.

All other arithmetic types are signed unless you use the 'unsigned'
qualifier.  For instance, it was safe to write

  short paramc;

instead of

  signed short paramc;

If you have an algorithm that depends on signed char or signed
bitfields, you had to find another way to write it before it could be
integrated into GCC.


Function prototypes
-------------------

You need to provide a function prototype for every function before you
use it, and functions had to be defined K+R style.  The function
prototype should have used the PARAMS macro, which takes a single
argument.  Therefore the parameter list had to be enclosed in
parentheses.  For example,

int myfunc PARAMS ((double, int *));

int
myfunc (var1, var2)
     double var1;
     int *var2;
{
  ...
}

This implies that if the function takes no arguments, it had to be
declared and defined as follows:

int myfunc PARAMS ((void));

int
myfunc ()
{
  ...
}

You also had to use PARAMS when referring to function protypes in
other circumstances, for example see "Calling functions through
pointers to functions" below.

Variable-argument functions are best described by example:-

void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...));

void
cpp_ice VPARAMS ((cpp_reader *pfile, const char *msgid, ...))
{
  VA_OPEN (ap, msgid);
  VA_FIXEDARG (ap, cpp_reader *, pfile);
  VA_FIXEDARG (ap, const char *, msgid);

  ...
  VA_CLOSE (ap);
}

See ansidecl.h for the definitions of the above macros and more.

One aspect of using K+R style function declarations, is you could not
have arguments whose types are char, short, or float, since without
prototypes (ie, K+R rules), these types are promoted to int, int, and
double respectively.

Calling functions through pointers to functions
-----------------------------------------------

K+R C compilers require parentheses around the dereferenced function
pointer expression in the call, whereas ISO C relaxes the syntax.  For
example

typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
      *p->handler (pfile, p->arg);

had to become

      (*p->handler) (pfile, p->arg);


Macros
------

The rules under K+R C and ISO C for achieving stringification and
token pasting are quite different.  Therefore some macros have been
defined which will get it right depending upon the compiler.

  CONCAT2(a,b) CONCAT3(a,b,c) and CONCAT4(a,b,c,d)

will paste the tokens passed as arguments.  You must not leave any
space around the commas.  Also,

  STRINGX(x)

will stringify an argument; to get the same result on K+R and ISO
compilers x should not have spaces around it.


Passing structures by value
---------------------------

You had to avoid passing structures by value, either to or from
functions.  It seems some K+R compilers handle this differently or not
at all.


Enums
-----

In K+R C, you had to cast enum types to use them as integers, and some
compilers in particular give lots of warnings for using an enum as an
array index.


Bitfields
---------

See also "signed keyword" above.  In K+R C only unsigned int bitfields
were defined (i.e. unsigned char, unsigned short, unsigned long.
Using plain int/short/long was not allowed).


Reserved Keywords
-----------------

K+R C has "entry" as a reserved keyword, so you had to not use it for
your variable names.


Type promotions
---------------

K+R used unsigned-preserving rules for arithmetic expresssions, while
ISO uses value-preserving.  This means an unsigned char compared to an
int is done as an unsigned comparison in K+R (since unsigned char
promotes to unsigned) while it is signed in ISO (since all of the
values in unsigned char fit in an int, it promotes to int).


Suffixes on Integer Constants
-----------------------------

K+R C did not accept a 'u' suffix on integer constants.  If you wanted
to declare a constant to be be unsigned, you had to use an explicit
cast.