C++ file including C header file

Question

I need to include a C header file in my C++ project but g++ throws "not declared in this scope" errors. I read that i need to use extern "C" keyword to fix it but it didn't seem to work for me.

Here is a dummy example triggering this error.

main.cpp:

#include <iostream>
extern "C"
{
#include "includedFile.h"
}
int main()
{
    int a = 2;
    int b = 1212;
    std::cout<< "Hello World!\n";

    return 0;
}

includedFile.h

#include <stdint.h>
enum TypeOfEnum {
    ONE,
    TWO,
    THREE,
    FOUR = INT32_MAX,
};

The error thrown is :

$> g++ main.cpp 
In file included from main.cpp:4:0:
includedFile.h:7:9: error: ‘INT32_MAX’ was not declared in this scope
FOUR = INT32_MAX,

I saw on this post that I may need #define __STDC_LIMIT_MACROS without any success.

Any help is welcome!

yes, but why did you put it there? You don't put a comma after the last thing in an enum, do you? — genisage, Jun 08 '14 at 03:14
@genisage The comma-after-last-item is actually allowed for enum declarations. — T.C., Jun 08 '14 at 03:16
@RSahu Doesn't compile with g++ 4.8.1 on Coliru unless you specify C++11; does compile with Clang 3.4 though. — T.C., Jun 08 '14 at 03:23

score 0 · Answer 1 · answered Jun 08 '14 at 03:20

0

<cstdint> is a C++11 feature. Pass -std=c++11 to your compiler.

answered Jun 08 '14 at 03:20

T.C.

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Forcing to C++11 doesn't seems right in my case, for portability issues. – fdeslaur Jun 08 '14 at 03:45
1

@fdeslaur ...then don't use a C++11 feature. – T.C. Jun 08 '14 at 03:58

C++ file including C header file

1 Answers1

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