gcc常见的编译警告与错误按字母顺序排列

gcc 常见的编译警告与错误（按字母顺序排列）

C语言初学者遇到的最大问题往往是看不懂编译错误，进而不知如何修改程序。有鉴于此，本附录罗列了用gcc编译程序时经常出现的编译警告与错误。需要提醒读者的是，出现警告（warning）并不影响目标程序的生成，但出现错误（error）则无法生成目标程序。

为便于读者查阅，下面列出了经常遇到的警告与错误，给出了中英文对照（英文按字典顺序排列），并对部分错误与警告做了必要的解释。

#%s expects \\ or …

#%s 需要\\ 或…

#%s is a deprecated GCC extension

#%s 是一个已过时的GCC 扩展

#%s is a GCC extension

#%s 是一个GCC 扩展

#~ error:

#~ 错误：

#~ In from %s:%u

#~ 在包含自%s：%u 的文件中

#~ internal error:

#~ 内部错误：

#~ no newline at end of file

#~ 文件未以空白行结束

#~ warning:

#~ 警告：

#elif after #else

#elif 出现在#else 后

#elif without #if

#elif 没有匹配的#if

#else after #else

#else 出现在#else 后

#else without #if

#else 没有匹配的#if

#endif without #if

#endif 没有匹配的#if

#include nested too deeply

#include 嵌套过深

#include_next in primary source file

#include_next 出现在主源文件中

#pragma %s %s is already registered

#pragma %s %s 已经被注册

#pragma %s is already registered

#pragma %s 已经被注册

#pragma once in main file

#pragma once 出现在主文件中

#pragma system_header ignored outside include file

#pragma system_heade 在包含文件外被忽略

%.*s is not a valid universal character

%.*s 不是一个有效的Unicode 字符

%s in preprocessing directive

预处理指示中出现%s

%s is a block device

%s 是一个块设备

%s is shorter than expected

%s 短于预期

%s is too large

%s 过大

%s with no expression

%s 后没有表达式

%s: not used because `%.*s’ defined as `%s’ not `%.*s’

%s：未使用因为‘%.*s’被定义为‘%s’而非‘%*.s’

%s: not used because `%.*s’ is poisoned

%s：未使用因为‘%.*s’已被投毒

%s: not used because `%.*s’ not defined

%s：未使用因为‘%.*s’未定义

%s: not used because `%s’ is defined

%s：未使用因为‘%s’已定义

%s: not used because `__COUNTER__’ is invalid

%s：未使用因为‘__COUNTER__’无效

(\%s\ is an alternative token for \%s\ in C++)

(在C++ 中“%s”会是“%s”的替代标识符)

(this will be reported only once per input file)

(此警告为每个输入文件只报告一次)

\%s\ after # is not a positive integer

# 后的“%s”不是一个正整数

\%s\ after #line is not a positive integer

#line 后的“%s”不是一个正整数

\%s\ cannot be used as a macro name as it is an operator in C++ “%s”不能被用作宏名，因为它是C++ 中的一个操作符

\%s\ is not a valid

“%s”不是一个有效的文件名

\%s\ is not defined

“%s”未定义

\%s\ may not appear in macro parameter list

“%s不能出现在宏参数列表中

\%s\ re-asserted

重断言“%s”

\%s\ redefined

“%s重定义

\/*\ within comment

“/*出现在注释中

\\x used with no following hex digits

\\x 后没有16 进制数字

\defined\ cannot be used as a macro name

“defined不能被用作宏名

__COUNTER__ expanded inside directive with -fdirectives-only

带-fdirectives-only 时__COUNTER__ 在指示中扩展

__V A_ARGS__ can only appear in the expansion of a C99 variadic macro __V A_ARGS__ 只能出现在C99 可变参数宏的展开中

_Pragma takes a parenthesized string literal

_Pragma 需要一个括起的字符串字面常量

‘%.*s’ is not in NFC

‘%.*s’不在NFC 中

‘%.*s’ is not in NFKC

‘%.*s’不在NFKC 中

‘##’ cannot appear at either end of a macro expansion

‘##’不能出现在宏展开的两端

‘#’ is not followed by a macro parameter

‘#’后没有宏参数

‘$’ in identifier or number

‘$’出现在标识符或数字中

‘:’ without preceding ‘?’

‘:’前没有‘?’

‘?’ without following ‘:’

‘?’后没有‘:’

'return' with a value, in function returning void

在void返回类型的函数中，return返回值。

"protocol_type" redefined

protocol_type重定义

anonymous variadic macros were introduced in C99

匿名可变参数宏在C99 中被引入

assertion without predicate

断言后没有谓词

assertions are a deprecated extension

断言是一个已过时的GCC 扩展

assertions are a GCC extension

断言是一个GCC 扩展

assignment discards qualifiers from pointer target type 赋值时，取消了右值的限定。

assignment from incompatible pointer type

不兼容的指针间赋值

attempt to use poisoned \%s\

试图使用有毒的“%s”

backslash and newline separated by space

反斜杠和换行为空格所分隔

backslash-newline at end of file

反斜杠续行出现在文件末尾

binary constants are a GCC extension

二进制常量是一个GCC 扩展

C++ style comments are not allowed in ISO C90

C++ 风格的注释在ISO C90 中不被允许

cannot find source

找不到源文件%s

Character %x might not be NFKC

字符%x 可能不是NFKC

character 0x%lx is not in the basic source character set\n

字符0x%lx 不在基本源字符集中\n

character 0x%lx is not unibyte in execution character set

字符0x%lx 在执行字符集中不是单字节的

character constant too long for its type

字符常量大小超出其类型

comma operator in operand of #if

#if 操作数中出现逗号

comparison between pointer and integer

integer与pointer比较

comparison is always false due to limited range of data type

由于数据类型范围的限制，比较结果一直为假

comparison is always true due to limited range of data type

由于数据类型范围的限制，比较结果一直为真。

conversion from %s to %s not supported by iconv

iconv 不支持从%s 到%s 的转换

converting escape sequence to execution character set

将转义序列转换到执行字符集

converting to execution character set

转换到可执行文件的字符集

converting UCN to execution character set

将UCN 转换到执行字符集

converting UCN to source character set

将UCN 转换到源字符集

could not determine date and time

无法决定日期与时间

could not determine

无法决定文件的时间戳

CPP arithmetic must be at least as precise as a target int

CPP 算术必须至少具有目标int 的精度

CPP half-integer narrower than CPP character

CPP 半整数短于CPP 字符

CPP on this host cannot handle wide character constants over %lu bits, but the target requires %lu bits

在此宿主机上，CPP 不能处理长于%lu 位的宽字符常量，但目标需要%lu 位

cppchar_t must be an unsigned type

cppchar_t 必须是无符号型

current older than %s

当前文件早于%s

decimal float constants are a GCC extension

十进制浮点常量是一个GCC 扩展

detected recursion whilst expanding macro \%s\

展开宏%s时检测到递归

division by zero in #if

#if 中用零做除数

duplicate macro parameter \%s\

重复的宏参数“%s”

embedding a directive within macro arguments is not portable

将一个指示嵌入宏参数中是不可移植的

empty character constant

空的字符常量

empty in #%s

#%s 中文件名为空

expected expression before 'else'

else之前无表达式

exponent has no digits

指数部分没有数字

extra tokens at end of #%s directive

#%s 指示的末尾有多余的标识符

failure to convert %s to %s

无法从%s 转换到%s

fixed-point constants are a GCC extension

定点常量是一个GCC 扩展

浮点常量出现在预处理表达式中

function-like macro \%s\ must be used with arguments in traditional C

类似函数的宏“%s”在传统 C 中必须与参数一起使用

hex escape sequence out of range

16 进制转义序列越界

hexadecimal floating constants require an exponent

16 进制浮点常量需要指数部分

identifier \%s\ is a special operator name in C++

标识符“%s”是C++ 中的一个特殊操作符

imaginary constants are a GCC extension

虚数常量是一个GCC 扩展

imaginary number in preprocessor expression

预处理表达式中出现虚数

impossible operator ‘%u’

不可能的操作‘%u’

In _cpp_valid_ucn but not a UCN

在_cpp_valid_ucn 中但不是一个UCN

incompatible implicit declaration of built-in function 'printf' 与内置的printf函数隐式声明不兼容。

incomplete universal character name %.*s

不完全的Unicode 字符名%.*s

initialization discards qualifiers from pointer target type

初始化取消了指针目标类型的限定。

initialization from incompatible pointer type

不兼容指针类型的初始化

integer constant is so large that it is unsigned

整数常量太大，认定为unsigned

integer constant is too large for its type

整数常量值超出其类型

预处理表达式中整数溢出

invalid #%s directive

无效的#%s 指示

invalid #pragma GCC poison directive

无效的#pragma GCC poison 指示

invalid #pragma pop_macro directive

无效的#pragma pop_macro 指示

invalid #pragma push_macro directive

无效的#pragma push_macro 指示

invalid built-in macro \%s\

无效的内建宏“%s”

invalid character ‘%c’ in raw string delimiter

原始字符串分隔符中有无效字符‘%c’

invalid digit \%c\ in binary constant

二进制常量中有无效数字“%c

invalid digit \%c\ in octal constant

8 进制常量中有非法字符“%c

invalid flag \%s\ in line directive

line 指示中有无效的标记“%s

invalid hash type %d in cpp_macro_definition

cpp_macro_definition 中有无效的散列类型%d

invalid prefix \0b\ for floating constant

浮点常量的“0b前缀无效

invalid preprocessing directive #%s

无效的预处理指示#%s

invalid storage class for function 'XXXXXX' 在文件的某个地方，丢失了一个大括号‘}’

invalid string literal, ignoring final ‘\\’

无效的字面字符串，忽略最后的‘\\’

invalid suffix \%.*s\ on floating constant

浮点常量的“%.*s后缀无效

invalid suffix \%.*s\ on integer constant

整数常量的“%.*s后缀无效

invalid suffix \%.*s\ with hexadecimal floating constant

十六进制浮点常量的“%.*s后缀无效

invoking macro %s argument %d: empty macro arguments are undefined in ISO C90 and ISO C++98

调用宏%s 的参数%d：空的宏参数未被ISO C90 和ISO C++98 定义

ISO C does not permit named variadic macros

ISO C 不允许有名的可变参数宏

ISO C99 requires rest arguments to be used

ISO C99 需要使用剩余的参数

ISO C99 requires whitespace after the macro name

ISO C99 要求宏名后必须有空白

line number out of range

行号超出范围

lvalue required as left operand of assignment

左值问题

macro \%s\ is not used

宏“%s”未被使用

macro \%s\ passed %u arguments, but takes just %u

宏“%s”传递了%u 个参数，但只需要%u 个

macro \%s\ requires %u arguments, but only %u given

宏“%s需要%u 个参数，但只给出了%u 个

macro argument \%s\ would be stringified in traditional C

宏参数“%s”将在传统C 中被字符串化

macro names must be identifiers

宏名必须是标识符

macro parameters must be comma-separated 宏参数必须由逗号隔开

missing ‘(‘ after predicate

谓词后缺少‘(’

missing ‘(‘ in expression

表达式中缺少‘(’

missing ‘)’ after \defined\"

“defined 后出现‘)’

missing ‘)’ in expression

表达式中缺少‘)’

missing ‘)’ in macro parameter list

在宏参数表中缺少‘)’

missing ‘)’ to complete answer

完整的答案缺少‘)’

missing binary operator before token \%s\ 标识符“%”s前缺少二元运算符

missing expression between ‘(‘ and ‘)’

‘(’与‘)’之间缺少表达式

missing terminating %c character

缺少结尾的%c 字符

missing terminating > character

缺少结尾的> 字符

missing whitespace after the macro name

宏名后缺少空白

multi-character character constant

多字节字符常量

multi-line comment

多行注释

Multiple include guards may be useful for:\n 多个防止重包含可能对其有用：\n

no iconv implementation, cannot convert from %s to %s

没有iconv 的实现，无法从%s 转换到%s

no include path in which to search for %s

没有包含路径可供搜索%s

no macro name given in #%s directive

#%s 指示中未给出宏名

no newline at end of file

在文件最后一行加上回车键

解释：在“Rationale for the C99 standard”一文中，有C99的相关信息：

A backslash immediately before a newline has long been used to continue string literals, as well as preprocessing command lines. In the interest of easing machine generation of C, and of transporting code to machines with restrictive physical line lengths, the C89 Committee generalized this mechanism to permit any token to be continued by interposing a backslash/newline sequence.

c/c++代码的每一行后面有一个“结束符”，也就是newline。避免当被include的文件展开后，前一个文件的最后一行与后一个文件的第一行直接被连接成一行从而造成错误。

non-ISO-standard escape sequence, ‘\\%c’

非ISO 标准的转义序列，‘\\%c’

null character(s) ignored

忽略空字符

null character(s) preserved in literal

空字符将保留在字面字符串中

NULL directory in find_file

find_file 中有NULL 目录

octal escape sequence out of range

8 进制转义序列越界

one or more PCH files were found, but they were invalid

找到一个或多个PCH 文件，但它们是无效的

operator \defined\ requires an identifier

操作符“defined需要一个标识符

operator ‘%s’ has no left operand

操作符‘%s’没有左操作数

operator ‘%s’ has no right operand

操作符‘%s’没有右操作数

passing argument 1 of 'mes_read_time' discards qualifiers from pointer target type12、

mes_函数第一个参数的传递，丢弃了指针目标类型限定。

parameter name missing

缺少形参名

passing argument 1 of 'send' makes pointer from integer without a cast

函数send的第一个integer型参数没有强制转换为pointer型

pasting \%s\ and \%s\ does not give a valid preprocessing token

毗连“%s”和“%s”不能给出一个有效的预处理标识符

poisoning existing macro \%s\

对已存在的宏“%s”投毒

predicate must be an identifier

谓词必须是一个标识符

predicate’s answer is empty

谓词的答案为空

preprocessor arithmetic has maximum precision of %lu bits; target requires %lu bits

预处理算术的最高精度为%lu 位；目标需要%lu 位

raw string delimiter longer than 16 characters

原始字符串分隔符长过16 个字符

registering \%s\ as both a pragma and a pragma namespace

“%s”既被注册为一个pragma 又被注册为一个pragma 命名空间

registering pragma \%s\ with name expansion and no namespace

pragma “%s”被注册为一个命名扩展，而没有命名空间

registering pragma with NULL handler

pragma 注册为被NULL 处理

registering pragmas in namespace \%s\ with mismatched name expansion

在命名空间“%s”中注册pragma 时名称扩展不匹配

return makes pointer from integer without a cast return使integer转换为pointer，没有加强制类型转换。

style of line directive is a GCC extension

line 指示的风格是一个GCC 扩展

suffix for double constant is a GCC extension

双精度常量后缀是一个GCC 扩展

suggest hiding #%s from traditional C with an indented #

建议使用缩进的# 以让#%s 对传统C 不可见

suggest not using #elif in traditional C

建议在传统C 中不使用#elif

syntax error in macro parameter list

宏参数列表语法错误

target char is less than 8 bits wide

目标char 短于8 位

target int is narrower than target char

目标int 短于目标char

target wchar_t is narrower than target char

目录wchar_t 短于目标char

the conditional began here

条件自此开始

the left operand of \%s\ changes sign when promoted

“%s的左操作数在提升时变换了符号

the meaning of ‘\\%c’ is different in traditional C

‘\\%c’的意义与在传统C 中不同

the meaning of ‘\\a’ is different in traditional C

‘\\a’的意义与在传统C 中不同

the meaning of ‘\\x’ is different in traditional C

‘\\x’的意义与在传统C 中不同

the right operand of \%s\ changes sign when promoted

“%s的右操作数在提升时变换了符号

this is the location of the previous definition

这是先前定义的位置

this use of \defined\ may not be portable

使用“defined可能不利于移植

token \%s\ is not valid in preprocessor expressions

标识符“%s”在预处理表达式中无效

too many decimal points in number

数字中有太多小数点

traditional C ignores #%s with the # indented

当# 有缩进时传统C 忽略#%s

traditional C rejects the \%.*s\ suffix

传统C 不接受“%.*s后缀

traditional C rejects the unary plus operator

传统C 不接受单目+ 运算符

trigraph ??%c converted to %c

三元符??%c 转换为%c

trigraph ??%c ignored, use -trigraphs to enable

三元符??%c 被忽略，请使用-trigraphs 来启用

unbalanced stack in %s

%s 中堆栈不平衡

undefining \%s\

取消对“%s”的定义

unexpected end of #line

#line 后未预期的文件结束

universal character %.*s is not valid at the start of an identifier Unicode 字符%.*s 在标识符开头无效

universal character %.*s is not valid in an identifier Unicode 字符%.*s 在标识符中无效

universal character names are only valid in C++ and C99

Unicode 字符名只在C++ 和C99 中有效

unknown escape sequence: ‘\\%c’

未知的转义序列：‘\\%c’

unknown escape sequence: ‘\\%s’

未知的转义序列：‘\\%s’

unspellable token %s

无法拼出的标识符%s

unterminated #%s

未终止的#%s

unterminated argument list invoking macro \%s\ 调用宏“%s”时参数列表未终止

unterminated comment

未结束的注释

unterminated raw string

未终止的原始字符串

use of C++0x long long integer constant

使用C++0x long long 整数常量

use of C99 hexadecimal floating constant

使用C99 式的16 进制浮点常量

use -Winvalid-pch for more information

使用-Winvalid-pch 以获得更多信息

while reading precompiled header

在读取预编译头时

while writing precompiled header

在写入预编译头时