c preprocessor expansion

c preprocessor expansion

[Task Struct From Hell]

Hi,

I was wondering if gcc has any argument which allows for the expansion
of all macros in a file, just so if we have something like the
following:


#define FOO "bar"

int main() {
   printf(FOO);
}

It will output this:

int main() {
   printf("bar");
}

Thanks,
TSFH

Re: c preprocessor expansion

[Nicholas Mc Guire]

>
>
> #define FOO "bar"
>
> int main() {
>    printf(FOO);
> }
>
> It will output this:
>
> int main() {
>    printf("bar");
> }
>
gcc -E file.c
hofrat@rtl14:~/stuff$ cat file.c
#define FOO "bar"

int main() {
   printf(FOO);
}

hofrat@rtl14:~/stuff$ gcc -E file.c
# 1 "file.c"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "file.c"


int main() {
   printf("bar");
}


hofrat

Re: c preprocessor expansion

[Yan Lin]

gcc -E would do this.


----- Original Message ----- 
From: "Task Struct From Hell" <taskstructfromhell@googlemail.com>
To: <linux-c-programming@vger.kernel.org>
Sent: Thursday, January 08, 2009 9:49 AM
Subject: c preprocessor expansion


> Hi,
>
> I was wondering if gcc has any argument which allows for the expansion
> of all macros in a file, just so if we have something like the
> following:
>
>
> #define FOO "bar"
>
> int main() {
>   printf(FOO);
> }
>
> It will output this:
>
> int main() {
>   printf("bar");
> }
>
> Thanks,
> TSFH
> --
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>
> 


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Re: c preprocessor expansion

[ninjaboy]

2009/1/8 Task Struct From Hell <taskstructfromhell@googlemail.com>:
> Hi,
>
> I was wondering if gcc has any argument which allows for the expansion
> of all macros in a file, just so if we have something like the
> following:
>
>
> #define FOO "bar"
>
> int main() {
>   printf(FOO);
> }
>
> It will output this:
>
> int main() {
>   printf("bar");
> }
>

gcc -E code.c -o codemacro.m

-- 
noone is alone.

Re: c preprocessor expansion

[Task Struct From Hell]

On Thu, Jan 8, 2009 at 6:11 PM, ninjaboy <n0b0dyn1nj4@gmail.com> wrote:
> 2009/1/8 Task Struct From Hell <taskstructfromhell@googlemail.com>:
>> Hi,
>>
>> I was wondering if gcc has any argument which allows for the expansion
>> of all macros in a file, just so if we have something like the
>> following:
>>
>>
>> #define FOO "bar"
>>
>> int main() {
>>   printf(FOO);
>> }
>>
>> It will output this:
>>
>> int main() {
>>   printf("bar");
>> }
>>
>
> gcc -E code.c -o codemacro.m

Cheers for all responses so far!