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GCC

docs/en/migration-guides/release-5.x/5.3/gcc.rst

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GCC

:link_to_translation:zh_CN:[中文]

Common Porting Problems and Fixes

sys/dirent.h No Longer Includes Function Prototypes

Issue ^^^^^^

Compilation errors may occur in code that previously worked with the old toolchain. For example:

.. code-block:: c

#include <sys/dirent.h>
/* .... */
DIR* dir = opendir("test_dir");
/* .... */
/**
 * Compile error:
 * test.c: In function 'test_opendir':
 * test.c:100:16: error: implicit declaration of function 'opendir' [-Werror=implicit-function-declaration]
 *   100 |     DIR* dir = opendir(path);
 *       |                ^~~~~~~
 */

Solution ^^^^^^^^^

To resolve this issue, the correct header must be included. Refactor the code like this:

.. code-block:: c

#include <dirent.h>
/* .... */
DIR* dir = opendir("test_dir");