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Eclipse marks macros from inttypes.h as syntax errors [message #1016685]

Thu, 07 March 2013 05:56

Konstantin Miller
Messages: 2
Registered: March 2013

Junior Member

Hi!

When I am using macros from inttypes.h (that allow for portable usage of printf-like formatting string across architectures), e.g., like this:

printf("This is a 64-bit integer: %"PRId64".\n", (int64_t)23);

Eclipse marks the line as "Syntax error". This is very annoying in code that uses many printf-like functions (fprintf, sprintf, fscanf, sscanf, etc). I am compiling the code using a manually generated makefile and everything compiles and runs so that I assume that the problem is with Eclipse?

Best,
Konstantin

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Re: Eclipse marks macros from inttypes.h as syntax errors [message #1016917 is a reply to message #1016685]

Fri, 08 March 2013 03:27

Axel Mueller
Messages: 1823
Registered: July 2009

Senior Member

Havae a look at the code from inttypes.h

/* The ISO C99 standard specifies that these macros must only be
   defined if explicitly requested.  */
#if !defined __cplusplus || defined __STDC_FORMAT_MACROS

=> you must define __STDC_FORMAT_MACROS to get it working.

I guess you are setting this define in your Makefile. You should add this define in Eclipse to Project Properties->C/C++ General->Paths and Symbols

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Re: Eclipse marks macros from inttypes.h as syntax errors [message #1017002 is a reply to message #1016917]

Fri, 08 March 2013 09:36

Konstantin Miller
Messages: 2
Registered: March 2013

Junior Member

Hi Axel,

thanks for your answer. I didn't mention that in my question but I am already defining __STDC_FORMAT_MACROS prior to including inttypes.h. So, this seems not to be the issue.

Do you also observe the problem with the PRIxx and SCNxx macros?

Best,
Konstantin

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Re: Eclipse marks macros from inttypes.h as syntax errors [message #1018221 is a reply to message #1017002]

Wed, 13 March 2013 08:33

Axel Mueller
Messages: 1823
Registered: July 2009

Senior Member

Konstantin Miller wrote on Fri, 08 March 2013 15:36

I didn't mention that in my question but I am already defining __STDC_FORMAT_MACROS prior to including inttypes.h.

Where do you define it?
Do you use something like this?

#define__STDC_FORMAT_MACROS
#include <inttypes.h>

This did not work for me. You have to set the define in Project Properties->C/C++ General->Paths and Symbols

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- search this forum
- see the FAQ http://wiki.eclipse.org/CDT/User/FAQ
- google

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