Thomas Petazzoni eab17d763c arch/Config.in: introduce BR2_ARCH_NEEDS_GCC_AT_LEAST_14
Since commit
a0d2a5cfec ("support/scripts/gen-bootlin-toolchains:
generate BR2_ARCH_NEEDS_GCC_AT_LEAST_X guard"), the
gen-bootlin-toolchains script will generate references to
BR2_ARCH_NEEDS_GCC_AT_LEAST_X including potentially against the "next"
version of gcc.

Indeed, a toolchain using gcc 13.x should have a "depends on
!BR2_ARCH_NEEDS_GCC_AT_LEAST_14" so that once some architectures that
require gcc 14.x are added, such toolchains are not made visible.

In order for this to work, we must have the
BR2_ARCH_NEEDS_GCC_AT_LEAST_x symbol ready for the N+1 version of gcc
compared to the latest one we support.

As we're supporting up to gcc 13.x right now, let's introduce the
symbol BR2_ARCH_NEEDS_GCC_AT_LEAST_14 so that gcc 13.x toolchains can
be marked depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_14.

The other alternative would be to make the gen-bootlin-toolchains a
bit smarter, and not emit this depends on
!BR2_ARCH_NEEDS_GCC_AT_LEAST_14 if BR2_ARCH_NEEDS_GCC_AT_LEAST_14 does
not exist. But this would require re-running the script when
BR2_ARCH_NEEDS_GCC_AT_LEAST_14 which we are unlikely to do. While
today, when the script is invoked, the usual check-symbols complains
and reminds us that BR2_ARCH_NEEDS_GCC_AT_LEAST_14 should be added, so
we remember to do it right away.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2023-12-28 21:57:44 +01:00
2023-12-26 22:29:22 +01:00

Buildroot is a simple, efficient and easy-to-use tool to generate embedded
Linux systems through cross-compilation.

The documentation can be found in docs/manual. You can generate a text
document with 'make manual-text' and read output/docs/manual/manual.text.
Online documentation can be found at http://buildroot.org/docs.html

To build and use the buildroot stuff, do the following:

1) run 'make menuconfig'
2) select the target architecture and the packages you wish to compile
3) run 'make'
4) wait while it compiles
5) find the kernel, bootloader, root filesystem, etc. in output/images

You do not need to be root to build or run buildroot.  Have fun!

Buildroot comes with a basic configuration for a number of boards. Run
'make list-defconfigs' to view the list of provided configurations.

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