linux-kernel - [PATCH] ACPI: tools: fix compilation error

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Date:   Wed,  6 Oct 2021 00:13:18 -0500
From:   Miguel Bernal Marin <miguel.bernal.marin@...ux.intel.com>
To:     Rafael J Wysocki <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
        Robert Moore <robert.moore@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        devel@...ica.org
Subject: [PATCH] ACPI: tools: fix compilation error

When acpi tools are compiled the following error is showed:

   $ cd tools/power/acpi
   $ make
     DESCEND tools/acpidbg
     MKDIR    include
     CP       include
     CC       tools/acpidbg/acpidbg.o
   In file included from /home/linux/tools/power/acpi/include/acpi/platform/acenv.h:152,
                    from /home/linux/tools/power/acpi/include/acpi/acpi.h:22,
                    from acpidbg.c:9:
   /home/linux/tools/power/acpi/include/acpi/platform/acgcc.h:25:10: fatal error: linux/stdarg.h: No such file or directory
      29 | #include <linux/stdarg.h>
         |          ^~~~~~~~~~~~~~~~
   compilation terminated.

Keep the same logic from ACPICA, just identify when is used inside kernel
or by acpi tool.

Fixes: c0891ac15f04 ("isystem: ship and use stdarg.h")
Signed-off-by: Miguel Bernal Marin <miguel.bernal.marin@...ux.intel.com>
---
 include/acpi/platform/acgcc.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/acpi/platform/acgcc.h b/include/acpi/platform/acgcc.h
index fb172a03a753..20ecb004f5a4 100644
--- a/include/acpi/platform/acgcc.h
+++ b/include/acpi/platform/acgcc.h
@@ -22,9 +22,14 @@ typedef __builtin_va_list va_list;
 #define va_arg(v, l)            __builtin_va_arg(v, l)
 #define va_copy(d, s)           __builtin_va_copy(d, s)
 #else
+#ifdef __KERNEL__
 #include <linux/stdarg.h>
-#endif
-#endif
+#else
+/* Used to build acpi tools */
+#include <stdarg.h>
+#endif /* __KERNEL__ */
+#endif /* ACPI_USE_BUILTIN_STDARG */
+#endif /* ! va_arg */

 #define ACPI_INLINE             __inline__

--
2.31.1