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@@ -1073,7 +1073,7 @@ extern char *getpass (const char *__prompt) __nonnull ((1));
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extern int fsync (int __fd);
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#endif /* Use BSD || X/Open || Unix98. */
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-#if 0 /*def __USE_GNU */
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+#if __USE_GNU
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/* Make all changes done to all files on the file system associated
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* with FD actually appear on disk. */
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extern int syncfs (int __fd) __THROW;
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