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-rw-r--r--lib/unistd.in.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 988090814..842025024 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -21,9 +21,23 @@
#endif
@PRAGMA_COLUMNS@
+#ifdef _GL_INCLUDING_UNISTD_H
+/* Special invocation convention:
+ - On Mac OS X 10.3.9 we have a sequence of nested includes
+ <unistd.h> -> <signal.h> -> <pthread.h> -> <unistd.h>
+ In this situation, the functions are not yet declared, therefore we cannot
+ provide the C++ aliases. */
+
+#@INCLUDE_NEXT@ @NEXT_UNISTD_H@
+
+#else
+/* Normal invocation convention. */
+
/* The include_next requires a split double-inclusion guard. */
#if @HAVE_UNISTD_H@
+# define _GL_INCLUDING_UNISTD_H
# @INCLUDE_NEXT@ @NEXT_UNISTD_H@
+# undef _GL_INCLUDING_UNISTD_H
#endif
/* Get all possible declarations of gethostname(). */
@@ -1539,4 +1553,5 @@ _GL_CXXALIASWARN (write);
_GL_INLINE_HEADER_END
#endif /* _@GUARD_PREFIX@_UNISTD_H */
+#endif /* _GL_INCLUDING_UNISTD_H */
#endif /* _@GUARD_PREFIX@_UNISTD_H */