toolchain name for building linux kernel?
Hi, Some years ago, I used to use sparc-ab-elf- to build linux kernel. I thought that tool was for building bare-metal program. (because linux kernel is a kind of bare-metal program itself) We had also sparc-ab-linux- that were used for compiling application that runs on linux. Recently, I found a website that I should use aarch64-linux-gnu tool to build the kernel. I tried following it and it generated vmlinux file. (I can't find the web page link, but I'm sure I wrote that procedure down when I built vmlinux) Now I find it strange, because the tool name 'aarch64-linux-gnu-' seems to be the one for compiling application on linux! Am I missing something? Could anyone clarify what is wrong with my idea? Chan
On Tue, 17 Nov 2020 14:37:00 +0900, ckim@etri.re.kr said:
Some years ago, I used to use sparc-ab-elf- to build linux kernel.
That will probably build a kernel for the Sun SPARC architecture...
Recently, I found a website that I should use aarch64-linux-gnu tool to build the kernel.
I tried following it and it generated vmlinux file. (I can't find the web page link, but I'm sure I wrote that procedure down when I built vmlinux)
That vmlinux file will only be useful for a 64-bit ARM architecture. What sort of machine are you going to run the newly built kernel on, and what sort of machine are you using for the build? (If you're building on the system you'll be booting it on, the distro's gcc and make commands should be sufficient)
Thanks for replying. Yes, at that time, it was sparc and this time it's aarch64. I'm building the kernel on x86_64 machine. So target is aarch64, host is x86_64. My question is about the end part (elf or linux). To build linux kernel, shouldn't it be elf? (using libraries for baremetal, like newlib) And to build a application that'll run on linux, shouldn't it be linux?(using libraries for linux) Please see that last part of https://wiki.osdev.org/Target_Triplet. I wonder why the toolchain name that I built linux kernel ends with -linux. Chan
-----Original Message----- From: Valdis Kletnieks <valdis@vt.edu> On Behalf Of Valdis Kl?tnieks Sent: Tuesday, November 17, 2020 3:31 PM To: ckim@etri.re.kr Cc: kernelnewbies@kernelnewbies.org Subject: Re: toolchain name for building linux kernel?
On Tue, 17 Nov 2020 14:37:00 +0900, ckim@etri.re.kr said:
Some years ago, I used to use sparc-ab-elf- to build linux kernel.
That will probably build a kernel for the Sun SPARC architecture...
Recently, I found a website that I should use aarch64-linux-gnu tool to build the kernel.
I tried following it and it generated vmlinux file. (I can't find the web page link, but I'm sure I wrote that procedure down when I built vmlinux)
That vmlinux file will only be useful for a 64-bit ARM architecture.
What sort of machine are you going to run the newly built kernel on, and what sort of machine are you using for the build?
(If you're building on the system you'll be booting it on, the distro's gcc and make commands should be sufficient)
Hi Valdis, and all, I tried it again, but I had error with aarch-linux-gnu- . So I changed it with export ARCH=arm64 export CROSS_COMPILE=aarch64-none-elf- and then, make defconfig make vmlinux and vmlinux was generated. So the kernel was built with aarch64-non-elf- toolchain as I thought normal. Maybe last time there was some mistake.. Thank you! Chan Kim
-----Original Message----- From: ckim@etri.re.kr <ckim@etri.re.kr> Sent: Wednesday, November 18, 2020 2:18 PM To: 'Valdis Klētnieks' <valdis.kletnieks@vt.edu> Cc: kernelnewbies@kernelnewbies.org Subject: RE: toolchain name for building linux kernel?
Thanks for replying. Yes, at that time, it was sparc and this time it's aarch64. I'm building the kernel on x86_64 machine. So target is aarch64, host is x86_64. My question is about the end part (elf or linux). To build linux kernel, shouldn't it be elf? (using libraries for baremetal, like newlib) And to build a application that'll run on linux, shouldn't it be linux?(using libraries for linux) Please see that last part of https://wiki.osdev.org/Target_Triplet. I wonder why the toolchain name that I built linux kernel ends with -linux. Chan
-----Original Message----- From: Valdis Kletnieks <valdis@vt.edu> On Behalf Of Valdis Kl?tnieks Sent: Tuesday, November 17, 2020 3:31 PM To: ckim@etri.re.kr Cc: kernelnewbies@kernelnewbies.org Subject: Re: toolchain name for building linux kernel?
On Tue, 17 Nov 2020 14:37:00 +0900, ckim@etri.re.kr said:
Some years ago, I used to use sparc-ab-elf- to build linux kernel.
That will probably build a kernel for the Sun SPARC architecture...
Recently, I found a website that I should use aarch64-linux-gnu tool to build the kernel.
I tried following it and it generated vmlinux file. (I can't find the web page link, but I'm sure I wrote that procedure down when I built vmlinux)
That vmlinux file will only be useful for a 64-bit ARM architecture.
What sort of machine are you going to run the newly built kernel on, and what sort of machine are you using for the build?
(If you're building on the system you'll be booting it on, the distro's gcc and make commands should be sufficient)
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