DT_DIR undefined

c c99 readdir
RiaD picture RiaD · Feb 11, 2012 · Viewed 10.2k times · Source

I want to check if file returned by readdir is directory. I tried do it using DT_DIR constant (as man readdir says) but it's undefined. What file should I include to get it?

Now I use

#include <sys/types.h>
#include <dirent.h>
#include <stdlib.h>
#include <errno.h>

gcc version is 4.6.1

Compilation string:

gcc a.c --std=c99 -Wall

Answer

Mat picture Mat · Feb 11, 2012

You need to have the _BSD_SOURCE feature test macro defined to get those defines, they are not standard, and GCC does not define that macro when compiling for C99.

gcc -std=c99 -D_BSD_SOURCE -Wall a.c

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