linux-kernel - [PATCH v2] tools/nolibc: Fix build of stdio.h due to header ordering

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Date:   Mon, 08 May 2023 22:30:36 +0900
From:   Mark Brown <broonie@...nel.org>
To:     Willy Tarreau <w@....eu>, "Paul E. McKenney" <paulmck@...nel.org>,
        Thomas Weißschuh <linux@...ssschuh.net>
Cc:     Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH v2] tools/nolibc: Fix build of stdio.h due to header
 ordering

When we added fd based file streams we created references to STx_FILENO in
stdio.h but these constants are declared in unistd.h which is the last file
included by the top level nolibc.h meaning those constants are not defined
when we try to build stdio.h. This causes programs using nolibc.h to fail
to build.

Reorder the headers to avoid this issue.

Fixes: d449546c957f ("tools/nolibc: implement fd-based FILE streams")
Acked-by: Willy Tarreau <w@....eu>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
Changes in v2:
- Rebase onto v6.4-rc1.
- This is now a fix for Linus' tree.
- Link to v1: https://lore.kernel.org/r/20230413-nolibc-stdio-fix-v1-1-fa05fc3ba1fe@kernel.org
---
 tools/include/nolibc/nolibc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 04739a6293c4..05a228a6ee78 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -99,11 +99,11 @@
 #include "sys.h"
 #include "ctype.h"
 #include "signal.h"
+#include "unistd.h"
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"
 #include "time.h"
-#include "unistd.h"
 #include "stackprotector.h"
 
 /* Used by programs to avoid std includes */

---
base-commit: ac9a78681b921877518763ba0e89202254349d1b
change-id: 20230413-nolibc-stdio-fix-fb42de39d099

Best regards,
-- 
Mark Brown,,, <broonie@...nel.org>