[ltt-dev] [PATCH] LTT_KPROBES is made to depend on LTT_TRACEPROBES

[laijs@cn.fujitsu.com (Lai Jiangshan)]

KOSAKI Motohiro wrote:
> Impact: fix build error
> 
> if LTT_KPROBES=y and LTT_TRACEPROBES=m, following build error happend.
> 
>   ltt/built-in.o: In function `ltt_specialized_trace':
>   ltt/probes/ltt-type-serializer.h:26: undefined reference to `_ltt_specialized_trace'
>   make: *** [.tmp_vmlinux1] error 1
> 
> In addition, many kernel developer hate "select" syntax. it should be avoided.
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com>
> ---
>  ltt/Kconfig |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/ltt/Kconfig b/ltt/Kconfig
> index 1d80b98..ef93140 100644
> --- a/ltt/Kconfig
> +++ b/ltt/Kconfig
> @@ -196,9 +196,9 @@ config LTT_KPROBES
>  	bool "Linux Trace Toolkit Kprobes Support"
>  	depends on HAVE_KPROBES
>  	depends on LTT_MARKER_CONTROL
> +	depends on  LTT_TRACEPROBES=y

I encountered this build error before. -:)

I think we should use LTT_SOME_CONFIG for ltt-type-serializer.ko
LTT_TRACEPROBES=y will build 10 or more modules into built-in kernel.

Lai

>  	select KPROBES
>  	select KALLSYMS
> -	select LTT_TRACEPROBES
>  	default y
>  	help
>  	  Allows connecting the LTTng tracer on kprobes using simple debugfs