Initializer provided for function ошибка

I am trying to port an ARM-C library to be compiled with x86_64 C++, and I am getting the following error:

In file included from /usr/include/c++/5/cwchar:44:0,
                 from /usr/include/c++/5/bits/postypes.h:40,
                 from /usr/include/c++/5/bits/char_traits.h:40,
                 from /usr/include/c++/5/string:40,
                 from MyFile.h:19,
/usr/include/wchar.h:226:20: error: initializer provided for function
       __THROW __asm ("wcschr") __attribute_pure__;
                     ^

where MyFile.h has the following structure

// comments
#pragma once
// comments
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string>              //<<< line 19

…

Initially, instead of it used to be which gave me a similar error:

In file included from MyFile.h:19:
/usr/include/string.h:73:21: error: initializer provided for function
          __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
                        ^

Compiler version:

GNU C++14 (Ubuntu 5.4.0-6ubuntu1~16.04.11) version 5.4.0 20160609 (x86_64-linux-gnu)
           compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3
ldd (Ubuntu GLIBC 2.23-0ubuntu11) 2.23

Compilation flags:

#g++ -O3 -std=c++14 -fpermissive -Wno-system-headers -w

UPDATE 1:

I’ve been modifying the Makefile, and the original version contains $@.via. For instance:

@$(COMPILE) -M -MF $(subst .o,.d.tmp,$@) -MT $@ -E $(C_FLAGS) $@.via $< -o $@.preprocessed.c

and I changed the $@.via for @$@.via because I saw that in an older project they did it like that. However, if I leave as $@.via I just get:

SomeFile.c:1:1 fatal error: OneHeader.h: No such file or directory

I am starting to think that my Makefile is somewhere wrong…

I misunderstood the compiler option… Few lines above, my makefile creates the @.via files passing DEFINES and INCLUDES

       @echo $(patsubst %, '%', $(C_DEFINES)) > $@.via
       @echo $(C_INCLUDE) >> $@.via

and those @.via files are passed as additional arguments for the compilation. While for armcc the --via is supported see here, I found that for g++ -according to the gcc doc- the syntax is @<your_file>. Thus, what @$@.via does is simply to parse the $@.via to <your_file>.via.

Now I am still getting the initializer provided for function error message.

UPDATE 2:

I found the problem and I explained what happened in the answer section. See below.

In file included from /usr/include/c++/5/cwchar:44:0,
                 from /usr/include/c++/5/bits/postypes.h:40,
                 from /usr/include/c++/5/bits/char_traits.h:40,
                 from /usr/include/c++/5/string:40,
                 from MyFile.h:19,
/usr/include/wchar.h:226:20: error: initializer provided for function
       __THROW __asm ("wcschr") __attribute_pure__;
                     ^

// comments
#pragma once
// comments
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string>              //<<< line 19

…

In file included from MyFile.h:19:
/usr/include/string.h:73:21: error: initializer provided for function
          __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
                        ^

GNU C++14 (Ubuntu 5.4.0-6ubuntu1~16.04.11) version 5.4.0 20160609 (x86_64-linux-gnu)
           compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3
ldd (Ubuntu GLIBC 2.23-0ubuntu11) 2.23

#g++ -O3 -std=c++14 -fpermissive -Wno-system-headers -w

@$(COMPILE) -M -MF $(subst .o,.d.tmp,$@) -MT $@ -E $(C_FLAGS) $@.via $< -o $@.preprocessed.c

SomeFile.c:1:1 fatal error: OneHeader.h: No such file or directory

       @echo $(patsubst %, '%', $(C_DEFINES)) > $@.via
       @echo $(C_INCLUDE) >> $@.via

1 ответ

Лучший ответ

/usr/include/wchar.h:226:20: error: initializer provided for function
       __THROW __asm ("wcschr") __attribute_pure__;

1. 10-15-2010

   
   

   #1

   

   
   Registered User
   

   ---

   C++ newbie program full of errors!
   

   Hi! I tryed to write down some code of C++, but i have some problems…
   …actually i am in my first 5 programs in C++ so i may have stupid mistakes…

   Code:

   #include <cstdio>
   #include <cstdlib>
   #include <iostream>
   
   using namespace std;
   
   class Data{
   	private:
   		int age;
   		char name;
   	public:
   		init();
   		printAll();
   };
   
   void init(class Data info)(
   	info.age = 20;
   	info.name = "Vasilis";
   }
   
   int main(void){
   	Data info;
   		cout << "Hello there! \n";
   		init(info);
   		// printAll(info); *i will declare this later! 
   return 0;
   }

   and my output is:

   Code:

   program.cpp:12: error: ISO C++ forbids declaration of �init� with no type
   program.cpp:13: error: ISO C++ forbids declaration of �printAll� with no type
   program.cpp:17: error: function �void init(Data)� is initialized like a variableprogram.cpp:17: error: �info� was not declared in this scope
   program.cpp:18: error: expected constructor, destructor, or type conversion before �.� token
   program.cpp:19: error: expected declaration before �}� token

   so, can anyone help me please…? thanks in advance…

   ---

2. 10-15-2010

   
   

   #2

   

   
   Registered User
   

   ---

   When you declare a function or method, it must have a return type.
   When you implement a class method outside of the class definition, the method name must be prefixed with the class name, i.e.,
   Your method implementation must also exactly match the method definition.

   ---

3. 10-15-2010

   
   

   #3

   

   
   Registered User
   

   ---

   Originally Posted by rags_to_riches
   

   When you declare a function or method, it must have a return type.
   When you implement a class method outside of the class definition, the method name must be prefixed with the class name, i.e.,

   Your method implementation must also exactly match the method definition.

   so, if i want to «call» the function init from main i would write something like yours, right?

   edit:
   you mean something like this one?

   Code:

   #include <cstdio>
   #include <cstdlib>
   #include <iostream>
   
   using namespace std;
   
   class Data{
   	private:
   		int age;
   		char name;
   	public:
   		int init();
   		void printAll();
   };
   
   int Data::init(void)(
   	age = 20;
   	name = "Vasilis";
   }
   
   void Data::printAll(void){
   	cout << "Hi!\n";
   }
   
   int main(void){
   	Data info;
   		cout << "Hello there! \n";
   		info.init();
   		info.printAll(); //*i will declare this later! 
   return 0;
   }

   Last edited by brack; 10-15-2010 at 07:02 AM.

   ---

4. 10-15-2010

   
   

   #4

   

   
   Registered User
   

   ---

   Here is a version of the code that should work

   Code:

   #include <cstdio>
   #include <cstdlib>
   #include <iostream>
   
   using namespace std;
   
   class Data{
   	private:
   		int age;
   		char name;
   	public:
   		void init();
   		void printAll();
   };
   
   void Data::init(){
   	age = 20;
   	name = "Vasilis";
   }
   
   void Data::printAll(){
                   cout << age "\n";
                   cout << name "\n";
   
   
   int main(void){
   	                Data info;
   		cout << "Hello there! \n";
   		info.init();
   		info.printAll(); // i will declare this later! 
   return 0;
   }

   Hope it helped!!!

   ---

5. 10-16-2010

   
   

   #5

   

   
   Registered User
   

   ---

   In init function there is this error…

   18 C:\Users\cs091770\Desktop\version.cpp invalid conversion from `const char*’ to `char’

   In printAll function there is this error…

   22 C:\Users\cs091770\Desktop\version.cpp expected `;’ before string constant
   23 C:\Users\cs091770\Desktop\version.cpp expected `;’ before string constant

   Can anyone correct them…?

   edit: Just to know i added the «}» that missed!!

   ---

6. 10-16-2010

   
   

   #6

   

   
   Lurking
   

   

   ---

   This is what happens when you accept code from morons who’ve only posted like three times and only like doing people’s homework (badly). Let’s fix what you wrote:

   Originally Posted by brack
   

   Code:

   #include <cstdio>
   #include <cstdlib>
   #include <iostream>
   
   using namespace std;
   
   class Data{
   	private:
   		int age;
   		char name;
   	public:
   		int init();
   		void printAll();
   };
   
   int Data::init(void)(
   	age = 20;
   	name = "Vasilis";
   }
   
   void Data::printAll(void){
   	cout << "Hi!\n";
   }
   
   int main(void){
   	Data info;
   		cout << "Hello there! \n";
   		info.init();
   		info.printAll(); //*i will declare this later! 
   return 0;
   }

   Compiling this I get

   Compiling: foo.cpp
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp:16: error: initializer provided for function
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp:18: error: expected constructor, destructor, or type conversion before ‘=’ token
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp:19: error: expected declaration before ‘}’ token
   Process terminated with status 1 (0 minutes, 1 seconds)
   3 errors, 0 warnings

   So what does this mean? Well you usually take it one error at a time. The first error is on line 16, and it says initializer provided for function. Whatever we typed, it is being interpreted as an initializer by the compiler. Except we know that init is a function and not a variable that could be initialized. To fix this, we have to scrutinize the syntax (as we always should). My editor highlights

   Code:

   void Data::init(void)(

   Obviously this parens was meant to be a bracket, so we replace that and recompile.

   Now we get

   Compiling: foo.cpp
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp: In member function ‘int Data::init()’:
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp:18: error: invalid conversion from ‘const char*’ to ‘char’
   C:\Documents and Settings\Owner\My Documents\foo\foo.cpp:19: warning: no return statement in function returning non-void
   Process terminated with status 1 (0 minutes, 0 seconds)
   1 errors, 1 warnings

   Now we need to fix both of these. The error would be fixed by changing char name to const char *name, but is that appropriate? By the way name is used, it looks like it is. So we change that and recompile. And if done correctly, you are left with the warning «no return statement in function returning non-void».

   That is only related to the init function, as the line number implies. This function looks like it should be a void function to me, so I would change the return type, but you can also return an int if you want.

   And then we have correct code! You did it yourself, and learned a lot, I hope.

   Last edited by whiteflags; 10-16-2010 at 10:15 AM.

   ---

7. 10-16-2010

   
   

   #7

   

   
   Registered User
   

   ---

   i did it!!! thank you so much whiteflags!!!
   i sincerely aπpreciate your help!!

   ---

8. 10-16-2010

   
   

   #8

   

   
   C++まいる！Cをこわせ！
   

   ---

   I think it is more appropriate that name be a std::string. That way, you can assign and modify it. std::string is, put simply, a C++ string.
   It should also avoid pointer pitfalls.

   Originally Posted by Adak
   

   io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.

   Originally Posted by Salem
   

   You mean it’s included as a crutch to help ancient programmers limp along without them having to relearn too much.

   Outside of your DOS world, your header file is meaningless.

   ---

9. 10-16-2010

   
   

   #9

   

   
   Lurking
   

   

   ---

   Originally Posted by Elysia
   

   I think it is more appropriate that name be a std::string. That way, you can assign and modify it. std::string is, put simply, a C++ string.
   It should also avoid pointer pitfalls.

   It would be more worth it if brack was actually doing string operations. As it is, he can assign to name as many times as he wants and print it.

   ---

10. 10-16-2010

    
    

    #10

    

    
    C++まいる！Cをこわせ！
    

    ---

    True that, but I figured it would scale better. Better to learn something that is works all the time and is safe than something that can be error prone and works only half the times.

    Originally Posted by Adak
    

    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.

    Originally Posted by Salem
    

    You mean it’s included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

    ---

11. 10-17-2010

    
    

    #11

    

    
    Registered User
    

    ---

    C++ is newbie to be! You may be right Elysia, i am now learning C++ (tips) so i missed it! i’ ll try modify this…

    ---

Я пытаюсь перенести библиотеку ARM-C для компиляции с x86_64 C++ и получаю следующую ошибку:

In file included from /usr/include/c++/5/cwchar:44:0,
                 from /usr/include/c++/5/bits/postypes.h:40,
                 from /usr/include/c++/5/bits/char_traits.h:40,
                 from /usr/include/c++/5/string:40,
                 from MyFile.h:19,
/usr/include/wchar.h:226:20: error: initializer provided for function
       __THROW __asm ("wcschr") __attribute_pure__;
                     ^

где MyFile.h имеет следующую структуру

// comments
#pragma once
// comments
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string>              //<<< line 19

…

Изначально, вместо того, что давало мне аналогичную ошибку:

In file included from MyFile.h:19:
/usr/include/string.h:73:21: error: initializer provided for function
          __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
                        ^

Версия компилятора:

GNU C++14 (Ubuntu 5.4.0-6ubuntu1~16.04.11) version 5.4.0 20160609 (x86_64-linux-gnu)
           compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3
ldd (Ubuntu GLIBC 2.23-0ubuntu11) 2.23

Флаги компиляции:

#g++ -O3 -std=c++14 -fpermissive -Wno-system-headers -w

ОБНОВЛЕНИЕ 1:

Я модифицировал Makefile, а исходная версия содержит [email protected]. Например:

@$(COMPILE) -M -MF $(subst .o,.d.tmp,$@) -MT $@ -E $(C_FLAGS) [email protected] $< -o [email protected]

и я изменил [email protected] за @[email protected]потому что я видел, что в более старом проекте они так и поступали. Однако, если я оставлю как[email protected] Я просто получаю:

SomeFile.c:1:1 fatal error: OneHeader.h: No such file or directory

Я начинаю думать, что мой Makefile где-то не так…

Я неправильно понял параметр компилятора… Несколькими строками выше мой make-файл создает @.viaфайлы, передающие DEFINES и INCLUDES

       @echo $(patsubst %, '%', $(C_DEFINES)) > [email protected]
       @echo $(C_INCLUDE) >> [email protected]

и те @.viaфайлы передаются в качестве дополнительных аргументов для компиляции. Хотя дляarmcc в --viaподдерживается см. здесь, я обнаружил, что для g++ — согласно документу gcc — синтаксис@<your_file>. Итак, что@[email protected] просто анализирует [email protected] к <your_file>.via.

Теперь я все еще получаю initializer provided for function сообщение об ошибке.

ОБНОВЛЕНИЕ 2:

Я нашел проблему и объяснил, что произошло, в разделе ответов. Смотри ниже.