linux-kernel - Re: Using a custom LDFLAG for all objects and binaries

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Date:   Sun, 10 May 2020 21:43:32 +0430
From:   Mahmood Naderan <mahmood.nt@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Using a custom LDFLAG for all objects and binaries

> Have you read Documentation/kbuild/makefiles.rst ?
>
>     LDFLAGS
>         Generic $(LD) options
>
>         Flags used for all invocations of the linker.


What I see is this in Documentation/kbuild/makefiles.txt

    LDFLAGS             Generic $(LD) options

        Flags used for all invocations of the linker.
        Often specifying the emulation is sufficient.

        Example:
                #arch/s390/Makefile
                LDFLAGS         := -m elf_s390
        Note: ldflags-y can be used to further customise
        the flags used. See chapter 3.7.



I have two questions then:
1- Can I use that as a bash variable? Like "LDFLAGS=--emit-relocs make"
or
2- Editing arch/x86/Makefile with
   KBUILD_LDFLAGS := -m --emit-relocs elf_$(UTS_MACHINE)

Thanks for your help.


Regards,
Mahmood