toplev.c (documented_lang_options): Document more language-specific options.
* toplev.c (documented_lang_options): Document more language-specific options. * doc/invoke.texi (Warning Options): Correct documentation for -Wno-multichar, -Wno-div-by-zero, and -Wsystem-headers. * c-decl.c (c_decode_option): Use a table to handle warning options. From-SVN: r50299
This commit is contained in:
parent
4f1aac4266
commit
75227a33f7
|
@ -1,3 +1,11 @@
|
|||
2002-03-04 Geoffrey Keating <geoffk@redhat.com>
|
||||
|
||||
* toplev.c (documented_lang_options): Document more
|
||||
language-specific options.
|
||||
* doc/invoke.texi (Warning Options): Correct documentation for
|
||||
-Wno-multichar, -Wno-div-by-zero, and -Wsystem-headers.
|
||||
* c-decl.c (c_decode_option): Use a table to handle warning options.
|
||||
|
||||
2002-03-05 Hans-Peter Nilsson <hp@bitrange.com>
|
||||
|
||||
* config/mmix/mmix.h (ENCODE_SECTION_INFO): Pass on new second
|
||||
|
|
207
gcc/c-decl.c
207
gcc/c-decl.c
|
@ -460,6 +460,50 @@ c_decode_option (argc, argv)
|
|||
int strings_processed;
|
||||
char *p = argv[0];
|
||||
|
||||
static const struct {
|
||||
/* The name of the option. */
|
||||
const char *option;
|
||||
/* If non-NULL, a flag variable to set to 0 or 1. If NULL,
|
||||
this means that cpp handles this option. */
|
||||
int *flag;
|
||||
} warn_options[] = {
|
||||
/* This list is in alphabetical order. Keep it like that. */
|
||||
{ "bad-function-cast", &warn_bad_function_cast },
|
||||
{ "cast-qual", &warn_cast_qual },
|
||||
{ "char-subscripts", &warn_char_subscripts },
|
||||
{ "comment", NULL },
|
||||
{ "comments", NULL },
|
||||
{ "conversion", &warn_conversion },
|
||||
{ "div-by-zero", &warn_div_by_zero },
|
||||
{ "float-equal", &warn_float_equal },
|
||||
{ "format-extra-args", &warn_format_extra_args },
|
||||
{ "format-nonliteral", &warn_format_nonliteral },
|
||||
{ "format-security", &warn_format_security },
|
||||
{ "format-y2k", &warn_format_y2k },
|
||||
{ "implicit-function-declaration", &mesg_implicit_function_declaration },
|
||||
{ "implicit-int", &warn_implicit_int },
|
||||
{ "import", NULL },
|
||||
{ "long-long", &warn_long_long },
|
||||
{ "main", &warn_main },
|
||||
{ "missing-braces", &warn_missing_braces },
|
||||
{ "missing-declarations", &warn_missing_declarations },
|
||||
{ "missing-format-attribute", &warn_missing_format_attribute },
|
||||
{ "missing-prototypes", &warn_missing_prototypes },
|
||||
{ "multichar", &warn_multichar },
|
||||
{ "nested-externs", &warn_nested_externs },
|
||||
{ "parentheses", &warn_parentheses },
|
||||
{ "pointer-arith", &warn_pointer_arith },
|
||||
{ "redundant-decls", &warn_redundant_decls },
|
||||
{ "return-type", &warn_return_type },
|
||||
{ "sequence-point", &warn_sequence_point },
|
||||
{ "sign-compare", &warn_sign_compare },
|
||||
{ "strict-prototypes", &warn_strict_prototypes },
|
||||
{ "traditional", &warn_traditional },
|
||||
{ "trigraphs", NULL },
|
||||
{ "undef", NULL },
|
||||
{ "write-strings", &flag_const_strings }
|
||||
};
|
||||
|
||||
strings_processed = cpp_handle_option (parse_in, argc, argv, 0);
|
||||
|
||||
if (!strcmp (p, "-fhosted") || !strcmp (p, "-fno-freestanding"))
|
||||
|
@ -595,14 +639,12 @@ c_decode_option (argc, argv)
|
|||
goto iso_1990;
|
||||
else if (!strcmp (p, "-Werror-implicit-function-declaration"))
|
||||
mesg_implicit_function_declaration = 2;
|
||||
else if (!strcmp (p, "-Wimplicit-function-declaration"))
|
||||
mesg_implicit_function_declaration = 1;
|
||||
else if (!strcmp (p, "-Wno-implicit-function-declaration"))
|
||||
mesg_implicit_function_declaration = 0;
|
||||
else if (!strcmp (p, "-Wimplicit-int"))
|
||||
warn_implicit_int = 1;
|
||||
else if (!strcmp (p, "-Wno-implicit-int"))
|
||||
warn_implicit_int = 0;
|
||||
else if (!strncmp (p, "-Wformat=", 9))
|
||||
set_Wformat (atoi (p + 9));
|
||||
else if (!strcmp (p, "-Wformat"))
|
||||
set_Wformat (1);
|
||||
else if (!strcmp (p, "-Wno-format"))
|
||||
set_Wformat (0);
|
||||
else if (!strcmp (p, "-Wimplicit"))
|
||||
{
|
||||
warn_implicit_int = 1;
|
||||
|
@ -611,142 +653,8 @@ c_decode_option (argc, argv)
|
|||
}
|
||||
else if (!strcmp (p, "-Wno-implicit"))
|
||||
warn_implicit_int = 0, mesg_implicit_function_declaration = 0;
|
||||
else if (!strcmp (p, "-Wlong-long"))
|
||||
warn_long_long = 1;
|
||||
else if (!strcmp (p, "-Wno-long-long"))
|
||||
warn_long_long = 0;
|
||||
else if (!strcmp (p, "-Wwrite-strings"))
|
||||
flag_const_strings = 1;
|
||||
else if (!strcmp (p, "-Wno-write-strings"))
|
||||
flag_const_strings = 0;
|
||||
else if (!strcmp (p, "-Wcast-qual"))
|
||||
warn_cast_qual = 1;
|
||||
else if (!strcmp (p, "-Wno-cast-qual"))
|
||||
warn_cast_qual = 0;
|
||||
else if (!strcmp (p, "-Wbad-function-cast"))
|
||||
warn_bad_function_cast = 1;
|
||||
else if (!strcmp (p, "-Wno-bad-function-cast"))
|
||||
warn_bad_function_cast = 0;
|
||||
else if (!strcmp (p, "-Wno-missing-noreturn"))
|
||||
warn_missing_noreturn = 0;
|
||||
else if (!strcmp (p, "-Wmissing-format-attribute"))
|
||||
warn_missing_format_attribute = 1;
|
||||
else if (!strcmp (p, "-Wno-missing-format-attribute"))
|
||||
warn_missing_format_attribute = 0;
|
||||
else if (!strcmp (p, "-Wpointer-arith"))
|
||||
warn_pointer_arith = 1;
|
||||
else if (!strcmp (p, "-Wno-pointer-arith"))
|
||||
warn_pointer_arith = 0;
|
||||
else if (!strcmp (p, "-Wstrict-prototypes"))
|
||||
warn_strict_prototypes = 1;
|
||||
else if (!strcmp (p, "-Wno-strict-prototypes"))
|
||||
warn_strict_prototypes = 0;
|
||||
else if (!strcmp (p, "-Wmissing-prototypes"))
|
||||
warn_missing_prototypes = 1;
|
||||
else if (!strcmp (p, "-Wno-missing-prototypes"))
|
||||
warn_missing_prototypes = 0;
|
||||
else if (!strcmp (p, "-Wmissing-declarations"))
|
||||
warn_missing_declarations = 1;
|
||||
else if (!strcmp (p, "-Wno-missing-declarations"))
|
||||
warn_missing_declarations = 0;
|
||||
else if (!strcmp (p, "-Wredundant-decls"))
|
||||
warn_redundant_decls = 1;
|
||||
else if (!strcmp (p, "-Wno-redundant-decls"))
|
||||
warn_redundant_decls = 0;
|
||||
else if (!strcmp (p, "-Wnested-externs"))
|
||||
warn_nested_externs = 1;
|
||||
else if (!strcmp (p, "-Wno-nested-externs"))
|
||||
warn_nested_externs = 0;
|
||||
else if (!strcmp (p, "-Wtraditional"))
|
||||
warn_traditional = 1;
|
||||
else if (!strcmp (p, "-Wno-traditional"))
|
||||
warn_traditional = 0;
|
||||
else if (!strncmp (p, "-Wformat=", 9))
|
||||
set_Wformat (atoi (p + 9));
|
||||
else if (!strcmp (p, "-Wformat"))
|
||||
set_Wformat (1);
|
||||
else if (!strcmp (p, "-Wno-format"))
|
||||
set_Wformat (0);
|
||||
else if (!strcmp (p, "-Wformat-y2k"))
|
||||
warn_format_y2k = 1;
|
||||
else if (!strcmp (p, "-Wno-format-y2k"))
|
||||
warn_format_y2k = 0;
|
||||
else if (!strcmp (p, "-Wformat-extra-args"))
|
||||
warn_format_extra_args = 1;
|
||||
else if (!strcmp (p, "-Wno-format-extra-args"))
|
||||
warn_format_extra_args = 0;
|
||||
else if (!strcmp (p, "-Wformat-nonliteral"))
|
||||
warn_format_nonliteral = 1;
|
||||
else if (!strcmp (p, "-Wno-format-nonliteral"))
|
||||
warn_format_nonliteral = 0;
|
||||
else if (!strcmp (p, "-Wformat-security"))
|
||||
warn_format_security = 1;
|
||||
else if (!strcmp (p, "-Wno-format-security"))
|
||||
warn_format_security = 0;
|
||||
else if (!strcmp (p, "-Wchar-subscripts"))
|
||||
warn_char_subscripts = 1;
|
||||
else if (!strcmp (p, "-Wno-char-subscripts"))
|
||||
warn_char_subscripts = 0;
|
||||
else if (!strcmp (p, "-Wconversion"))
|
||||
warn_conversion = 1;
|
||||
else if (!strcmp (p, "-Wno-conversion"))
|
||||
warn_conversion = 0;
|
||||
else if (!strcmp (p, "-Wparentheses"))
|
||||
warn_parentheses = 1;
|
||||
else if (!strcmp (p, "-Wno-parentheses"))
|
||||
warn_parentheses = 0;
|
||||
else if (!strcmp (p, "-Wreturn-type"))
|
||||
warn_return_type = 1;
|
||||
else if (!strcmp (p, "-Wno-return-type"))
|
||||
warn_return_type = 0;
|
||||
else if (!strcmp (p, "-Wsequence-point"))
|
||||
warn_sequence_point = 1;
|
||||
else if (!strcmp (p, "-Wno-sequence-point"))
|
||||
warn_sequence_point = 0;
|
||||
else if (!strcmp (p, "-Wcomment"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wno-comment"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wcomments"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wno-comments"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wtrigraphs"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wno-trigraphs"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wundef"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wno-undef"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wimport"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wno-import"))
|
||||
; /* cpp handles this one. */
|
||||
else if (!strcmp (p, "-Wmissing-braces"))
|
||||
warn_missing_braces = 1;
|
||||
else if (!strcmp (p, "-Wno-missing-braces"))
|
||||
warn_missing_braces = 0;
|
||||
else if (!strcmp (p, "-Wmain"))
|
||||
warn_main = 1;
|
||||
else if (!strcmp (p, "-Wno-main"))
|
||||
warn_main = -1;
|
||||
else if (!strcmp (p, "-Wsign-compare"))
|
||||
warn_sign_compare = 1;
|
||||
else if (!strcmp (p, "-Wno-sign-compare"))
|
||||
warn_sign_compare = 0;
|
||||
else if (!strcmp (p, "-Wfloat-equal"))
|
||||
warn_float_equal = 1;
|
||||
else if (!strcmp (p, "-Wno-float-equal"))
|
||||
warn_float_equal = 0;
|
||||
else if (!strcmp (p, "-Wmultichar"))
|
||||
warn_multichar = 1;
|
||||
else if (!strcmp (p, "-Wno-multichar"))
|
||||
warn_multichar = 0;
|
||||
else if (!strcmp (p, "-Wdiv-by-zero"))
|
||||
warn_div_by_zero = 1;
|
||||
else if (!strcmp (p, "-Wno-div-by-zero"))
|
||||
warn_div_by_zero = 0;
|
||||
else if (!strcmp (p, "-Wunknown-pragmas"))
|
||||
/* Set to greater than 1, so that even unknown pragmas in system
|
||||
headers will be warned about. */
|
||||
|
@ -777,7 +685,20 @@ c_decode_option (argc, argv)
|
|||
warn_unknown_pragmas = 1;
|
||||
}
|
||||
else
|
||||
return strings_processed;
|
||||
{
|
||||
size_t i;
|
||||
for (i = 0; i < sizeof (warn_options) / sizeof (warn_options[0]); i++)
|
||||
if (strncmp (p, "-W", 2) == 0
|
||||
&& warn_options[i].flag
|
||||
&& (strcmp (p+2, warn_options[i].option) == 0
|
||||
|| (strncmp (p+2, "no-", 3) == 0
|
||||
&& strcmp (p+5, warn_options[i].option) == 0)))
|
||||
{
|
||||
*(warn_options[i].flag) = strncmp (p+2, "no-", 3) != 0;
|
||||
return 1;
|
||||
}
|
||||
return strings_processed;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
|
|
@ -214,7 +214,7 @@ in the following sections.
|
|||
-w -W -Wall -Waggregate-return @gol
|
||||
-Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment @gol
|
||||
-Wconversion -Wno-deprecated-declarations @gol
|
||||
-Wdisabled-optimization -Wdiv-by-zero -Werror @gol
|
||||
-Wdisabled-optimization -Wno-div-by-zero -Werror @gol
|
||||
-Wfloat-equal -Wformat -Wformat=2 @gol
|
||||
-Wformat-nonliteral -Wformat-security @gol
|
||||
-Wimplicit -Wimplicit-int @gol
|
||||
|
@ -224,7 +224,7 @@ in the following sections.
|
|||
-Wlarger-than-@var{len} -Wlong-long @gol
|
||||
-Wmain -Wmissing-braces -Wmissing-declarations @gol
|
||||
-Wmissing-format-attribute -Wmissing-noreturn @gol
|
||||
-Wmultichar -Wno-format-extra-args -Wno-format-y2k @gol
|
||||
-Wno-multichar -Wno-format-extra-args -Wno-format-y2k @gol
|
||||
-Wno-import -Wpacked -Wpadded @gol
|
||||
-Wparentheses -Wpointer-arith -Wredundant-decls @gol
|
||||
-Wreturn-type -Wsequence-point -Wshadow @gol
|
||||
|
@ -2172,35 +2172,6 @@ All of the above @samp{-W} options combined. This enables all the
|
|||
warnings about constructions that some users consider questionable, and
|
||||
that are easy to avoid (or modify to prevent the warning), even in
|
||||
conjunction with macros.
|
||||
|
||||
@item -Wdiv-by-zero
|
||||
@opindex Wno-div-by-zero
|
||||
@opindex Wdiv-by-zero
|
||||
Warn about compile-time integer division by zero. This is default. To
|
||||
inhibit the warning messages, use @option{-Wno-div-by-zero}. Floating
|
||||
point division by zero is not warned about, as it can be a legitimate
|
||||
way of obtaining infinities and NaNs.
|
||||
|
||||
@item -Wmultichar
|
||||
@opindex Wno-multichar
|
||||
@opindex Wmultichar
|
||||
Warn if a multicharacter constant (@samp{'FOOF'}) is used. This is
|
||||
default. To inhibit the warning messages, use @option{-Wno-multichar}.
|
||||
Usually they indicate a typo in the user's code, as they have
|
||||
implementation-defined values, and should not be used in portable code.
|
||||
|
||||
@item -Wsystem-headers
|
||||
@opindex Wsystem-headers
|
||||
@cindex warnings from system headers
|
||||
@cindex system headers, warnings from
|
||||
Print warning messages for constructs found in system header files.
|
||||
Warnings from system headers are normally suppressed, on the assumption
|
||||
that they usually do not indicate real problems and would only make the
|
||||
compiler output harder to read. Using this command line option tells
|
||||
GCC to emit warnings from system headers as if they occurred in user
|
||||
code. However, note that using @option{-Wall} in conjunction with this
|
||||
option will @emph{not} warn about unknown pragmas in system
|
||||
headers---for that, @option{-Wunknown-pragmas} must also be used.
|
||||
@end table
|
||||
|
||||
The following @option{-W@dots{}} options are not implied by @option{-Wall}.
|
||||
|
@ -2289,6 +2260,26 @@ struct s x = @{ 3, 4 @};
|
|||
@end smallexample
|
||||
@end itemize
|
||||
|
||||
@item -Wno-div-by-zero
|
||||
@opindex Wno-div-by-zero
|
||||
@opindex Wdiv-by-zero
|
||||
Do not warn about compile-time integer division by zero. Floating point
|
||||
division by zero is not warned about, as it can be a legitimate way of
|
||||
obtaining infinities and NaNs.
|
||||
|
||||
@item -Wsystem-headers
|
||||
@opindex Wsystem-headers
|
||||
@cindex warnings from system headers
|
||||
@cindex system headers, warnings from
|
||||
Print warning messages for constructs found in system header files.
|
||||
Warnings from system headers are normally suppressed, on the assumption
|
||||
that they usually do not indicate real problems and would only make the
|
||||
compiler output harder to read. Using this command line option tells
|
||||
GCC to emit warnings from system headers as if they occurred in user
|
||||
code. However, note that using @option{-Wall} in conjunction with this
|
||||
option will @emph{not} warn about unknown pragmas in system
|
||||
headers---for that, @option{-Wunknown-pragmas} must also be used.
|
||||
|
||||
@item -Wfloat-equal
|
||||
@opindex Wfloat-equal
|
||||
Warn if floating point values are used in equality comparisons.
|
||||
|
@ -2505,6 +2496,13 @@ case, and some functions for which @code{format} attributes are
|
|||
appropriate may not be detected. This option has no effect unless
|
||||
@option{-Wformat} is enabled (possibly by @option{-Wall}).
|
||||
|
||||
@item -Wno-multichar
|
||||
@opindex Wno-multichar
|
||||
@opindex Wmultichar
|
||||
Do not warn if a multicharacter constant (@samp{'FOOF'}) is used.
|
||||
Usually they indicate a typo in the user's code, as they have
|
||||
implementation-defined values, and should not be used in portable code.
|
||||
|
||||
@item -Wno-deprecated-declarations
|
||||
@opindex Wno-deprecated-declarations
|
||||
Do not warn about uses of functions, variables, and types marked as
|
||||
|
|
31
gcc/toplev.c
31
gcc/toplev.c
|
@ -1231,7 +1231,6 @@ documented_lang_options[] =
|
|||
{ "-Wbad-function-cast",
|
||||
N_("Warn about casting functions to incompatible types") },
|
||||
{ "-Wno-bad-function-cast", "" },
|
||||
{ "-Wno-missing-noreturn", "" },
|
||||
{ "-Wmissing-format-attribute",
|
||||
N_("Warn about functions which might be candidates for format attributes") },
|
||||
{ "-Wno-missing-format-attribute", "" },
|
||||
|
@ -1250,12 +1249,15 @@ documented_lang_options[] =
|
|||
{ "-Wconversion",
|
||||
N_("Warn about possibly confusing type conversions") },
|
||||
{ "-Wno-conversion", "" },
|
||||
{ "-Wdiv-by-zero", "" },
|
||||
{ "-Wno-div-by-zero",
|
||||
N_("Do not warn about compile-time integer division by zero") },
|
||||
{ "-Wfloat-equal",
|
||||
N_("Warn about testing equality of floating point numbers") },
|
||||
{ "-Wno-float-equal", "" },
|
||||
{ "-Wformat",
|
||||
N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
|
||||
{ "-Wno-format", "" },
|
||||
{ "-Wformat-y2k", "" },
|
||||
{ "-Wno-format-y2k",
|
||||
N_("Don't warn about strftime formats yielding 2 digit years") },
|
||||
{ "-Wformat-extra-args", "" },
|
||||
{ "-Wno-format-extra-args",
|
||||
N_("Don't warn about too many arguments to format functions") },
|
||||
|
@ -1265,6 +1267,9 @@ documented_lang_options[] =
|
|||
{ "-Wformat-security",
|
||||
N_("Warn about possible security problems with format functions") },
|
||||
{ "-Wno-format-security", "" },
|
||||
{ "-Wformat-y2k", "" },
|
||||
{ "-Wno-format-y2k",
|
||||
N_("Don't warn about strftime formats yielding 2 digit years") },
|
||||
{ "-Wimplicit-function-declaration",
|
||||
N_("Warn about implicit function declarations") },
|
||||
{ "-Wno-implicit-function-declaration", "" },
|
||||
|
@ -1301,24 +1306,21 @@ documented_lang_options[] =
|
|||
{ "-Wparentheses",
|
||||
N_("Warn about possible missing parentheses") },
|
||||
{ "-Wno-parentheses", "" },
|
||||
{ "-Wsequence-point",
|
||||
N_("Warn about possible violations of sequence point rules") },
|
||||
{ "-Wno-sequence-point", "" },
|
||||
{ "-Wpointer-arith",
|
||||
N_("Warn about function pointer arithmetic") },
|
||||
{ "-Wno-pointer-arith", "" },
|
||||
{ "-Wredundant-decls",
|
||||
N_("Warn about multiple declarations of the same object") },
|
||||
{ "-Wno-redundant-decls", "" },
|
||||
{ "-Wreturn-type",
|
||||
N_("Warn whenever a function's return-type defaults to int") },
|
||||
{ "-Wno-return-type", "" },
|
||||
{ "-Wsequence-point",
|
||||
N_("Warn about possible violations of sequence point rules") },
|
||||
{ "-Wno-sequence-point", "" },
|
||||
{ "-Wsign-compare",
|
||||
N_("Warn about signed/unsigned comparisons") },
|
||||
{ "-Wno-sign-compare", "" },
|
||||
{ "-Wfloat-equal",
|
||||
N_("Warn about testing equality of floating point numbers") },
|
||||
{ "-Wno-float-equal", "" },
|
||||
{ "-Wunknown-pragmas",
|
||||
N_("Warn about unrecognized pragmas") },
|
||||
{ "-Wno-unknown-pragmas", "" },
|
||||
{ "-Wstrict-prototypes",
|
||||
N_("Warn about non-prototyped function decls") },
|
||||
{ "-Wno-strict-prototypes", "" },
|
||||
|
@ -1330,6 +1332,9 @@ documented_lang_options[] =
|
|||
{ "-Wno-trigraphs", "" },
|
||||
{ "-Wundef", "" },
|
||||
{ "-Wno-undef", "" },
|
||||
{ "-Wunknown-pragmas",
|
||||
N_("Warn about unrecognized pragmas") },
|
||||
{ "-Wno-unknown-pragmas", "" },
|
||||
{ "-Wwrite-strings",
|
||||
N_("Mark strings as 'const char *'") },
|
||||
{ "-Wno-write-strings", "" },
|
||||
|
|
Loading…
Reference in New Issue