renameat declaration on NetBSD 7.0

[Bruno Haible]

On NetBSD 7.0, I'm seeing this test compilation failure:

gcc -std=gnu99 -DHAVE_CONFIG_H -DEXEEXT=\"\" -I. -I../../gltests -I.. -DGNULIB_STRICT_CHECKING=1 -DIN_GNULIB_TESTS=1 -I. -I../../gltests -I.. -I../../gltests/.. -I../gllib -I../../gltests/../gllib -I/home/bruno/include -Wall -D_XOPEN_SOURCE=500 -g -O2 -MT test-renameat.o -MD -MP -MF $depbase.Tpo -c -o test-renameat.o ../../gltests/test-renameat.c &&\
mv -f $depbase.Tpo $depbase.Po
In file included from ../../gltests/test-renameat.c:23:0:
../../gltests/test-renameat.c:24:18: error: 'renameat' undeclared here (not in a function)
SIGNATURE_CHECK (renameat, int, (int, char const *, int, char const *));
^
../../gltests/signature.h:46:58: note: in definition of macro 'SIGNATURE_CHECK2'
static ret (* _GL_UNUSED signature_check ## id) args = fn
^
../../gltests/signature.h:39:3: note: in expansion of macro 'SIGNATURE_CHECK1'
SIGNATURE_CHECK1 (fn, ret, args, __LINE__)
^
../../gltests/test-renameat.c:24:1: note: in expansion of macro 'SIGNATURE_CHECK'
SIGNATURE_CHECK (renameat, int, (int, char const *, int, char const *));
^
Makefile:8106: recipe for target 'test-renameat.o' failed


This patch fixes it.


2017-08-15 Bruno Haible <***@clisp.org>

renameat: Ensure declaration in <stdio.h> on NetBSD.
* lib/stdio.in.h: Include <unistd,h> also on NetBSD.
* doc/posix-functions/renameat.texi: Mention this problem.

diff --git a/doc/posix-functions/renameat.texi b/doc/posix-functions/renameat.texi
index 46b25b1..ee01b89 100644
--- a/doc/posix-functions/renameat.texi
+++ b/doc/posix-functions/renameat.texi
@@ -19,7 +19,7 @@ Solaris 9.
@item
This function is declared in @code{<unistd.h>} instead of @code{<stdio.h>}
on some platforms:
-Solaris 11 2011-11.
+NetBSD 7.0, Solaris 11 2011-11.
@item
This function is missing on some platforms:
glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 5329b9d..5ca8a23 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -111,9 +111,9 @@
#define _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM(formatstring_parameter, first_argument) \
_GL_ATTRIBUTE_FORMAT ((__scanf__, formatstring_parameter, first_argument))

-/* Solaris 10 declares renameat in <unistd.h>, not in <stdio.h>. */
+/* Solaris 10 and NetBSD 7.0 declare renameat in <unistd.h>, not in <stdio.h>. */
/* But in any case avoid namespace pollution on glibc systems. */
-#if (@GNULIB_RENAMEAT@ || defined GNULIB_POSIXCHECK) && defined __sun \
+#if (@GNULIB_RENAMEAT@ || defined GNULIB_POSIXCHECK) && (defined __sun || defined __NetBSD__) \
&& ! defined __GLIBC__
# include <unistd.h>
#endif