Re: [PATCH 1/4] init/Kconfig: add config support for detecting linker

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

----- ndesaulniers@google.com wrote:
> Similar to how we differentiate between CONFIG_CC_IS_GCC and
> CONFIG_CC_IS_CLANG, add CONFIG_LD_IS_BFD, CONFIG_LD_IS_GOLD, and
> CONFIG_LD_IS_LLD.
> 
> This simiplifies patches to Makefiles that need to do different things
> for different linkers.

What guarantees that the linker used for e.g. make defconfig is the same linker used for make ?

Is it required with this patch ?

How does it work in a cross compile environment ?

Thanks,

Mathieu


> 
> Cc: Nathan Chancellor <natechancellor@gmail.com>
> Cc: Sami Tolvanen <samitolvanen@google.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> ---
>  init/Kconfig | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/init/Kconfig b/init/Kconfig
> index c9386a365eea..b6046dcf7794 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -26,6 +26,15 @@ config CLANG_VERSION
>  config CC_HAS_ASM_GOTO
>  	def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
>  
> +config LD_IS_BFD
> +	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'GNU ld')
> +
> +config LD_IS_GOLD
> +	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'GNU gold')
> +
> +config LD_IS_LLD
> +	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'LLD')
> +
>  config CONSTRUCTORS
>  	bool
>  	depends on !UML
> -- 
> 2.20.1.791.gb4d0f1c61a-goog
> 

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com