linux-kernel - Re: [PATCH] tools/power/acpi: Fix the compile error when output directory is specified

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Date:   Tue, 23 Nov 2021 15:53:07 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Chen Yu <yu.c.chen@...el.com>
Cc:     linux-acpi@...r.kernel.org, Robert Moore <robert.moore@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <lenb@...nel.org>, devel@...ica.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools/power/acpi: Fix the compile error when output
 directory is specified

On Tue, Nov 23, 2021 at 09:23:30PM +0800, Chen Yu wrote:
> Compiling the tool when output directory parameter is specified would
> trigger the following error:
> 
> make O=/data/test/tmp/ -C tools/power/acpi/
> 
> make: Entering directory '/data/src/kernel/linux/tools/power/acpi'
>   DESCEND tools/acpidbg
> make[1]: Entering directory '/data/src/kernel/linux/tools/power/acpi/tools/acpidbg'
>   MKDIR    include
>   CP       include
>   CC       tools/acpidbg/acpidbg.o
> Assembler messages:
> Fatal error: can't create /data/test/tmp/tools/power/acpi/tools/acpidbg/acpidbg.o: No such file or directory
> make[1]: *** [../../Makefile.rules:24: /data/test/tmp/tools/power/acpi/tools/acpidbg/acpidbg.o] Error 1
> make[1]: Leaving directory '/data/src/kernel/linux/tools/power/acpi/tools/acpidbg'
> make: *** [Makefile:18: acpidbg] Error 2
> make: Leaving directory '/data/src/kernel/linux/tools/power/acpi'
> 
> This is because the output directory has not been created yet. Fix this issue by
> creating the output directory before compiling.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Thanks!

> Reported-by: Andy Shevchenko <andriy.shevchenko@...el.com>
> Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> ---
>  tools/power/acpi/Makefile.config | 1 +
>  tools/power/acpi/Makefile.rules  | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/tools/power/acpi/Makefile.config b/tools/power/acpi/Makefile.config
> index 331f6d30f472..cd7106876a5f 100644
> --- a/tools/power/acpi/Makefile.config
> +++ b/tools/power/acpi/Makefile.config
> @@ -69,6 +69,7 @@ KERNEL_INCLUDE := $(OUTPUT)include
>  ACPICA_INCLUDE := $(srctree)/../../../drivers/acpi/acpica
>  CFLAGS += -D_LINUX -I$(KERNEL_INCLUDE) -I$(ACPICA_INCLUDE)
>  CFLAGS += $(WARNINGS)
> +MKDIR = mkdir
>  
>  ifeq ($(strip $(V)),false)
>  	QUIET=@
> diff --git a/tools/power/acpi/Makefile.rules b/tools/power/acpi/Makefile.rules
> index 2a6c170b57cd..1d7616f5d0ae 100644
> --- a/tools/power/acpi/Makefile.rules
> +++ b/tools/power/acpi/Makefile.rules
> @@ -21,6 +21,7 @@ $(KERNEL_INCLUDE):
>  
>  $(objdir)%.o: %.c $(KERNEL_INCLUDE)
>  	$(ECHO) "  CC      " $(subst $(OUTPUT),,$@)
> +	$(QUIET) $(MKDIR) -p $(objdir) 2>/dev/null

Not sure we need the `2>/dev/null` part.

>  	$(QUIET) $(CC) -c $(CFLAGS) -o $@ $<
>  
>  all: $(OUTPUT)$(TOOL)
> -- 
> 2.25.1
> 

-- 
With Best Regards,
Andy Shevchenko