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support/config-fragments: fix bootlin-x86-i686-musl

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Commit a8be4a04ad "support/config-fragments: replace
br-i386-pentium-mmx-musl" replaced this old toolchain by
bootlin-x86-i686-musl.

When using test-pkg with all toolchains, bootlin-x86-i686-musl is always
failing. The issue can be reproduced with for example:

    utils/test-pkg -a -p busybox

The issue can also be reproduced with a simple config like:

    cat > .config <<EOF
    BR2_i386=y
    BR2_TOOLCHAIN_EXTERNAL=y
    BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
    BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_X86_I686_MUSL_STABLE=y
    BR2_PACKAGE_BUSYBOX=y
    EOF
    make olddefconfig
    make

Compilation fail with output:

    Cannot execute cross-compiler '/i586-linux-gcc'

This issue happen is because the toolchain can never be selected.

The config fragment [1] selects BR2_i386 alone.

The target architecture variant default to i586 if target
architecture is i386. See [2].

Finally, the generated toolchain options includes a depends on
BR2_i386 and !BR2_x86_i586, making the toolchain always ignored.
See [3].

This commit fixes the issue by adding BR2_x86_i686=y to the
bootlin-x86-i686-musl.config fragment as suggested by the
Bootlin toolchain fragment [4].

[1] a8be4a04ad/support/config-fragments/autobuild/bootlin-x86-i686-musl.config
[2] https://gitlab.com/buildroot.org/buildroot/-/blob/2024.02.2/arch/Config.in.x86?ref_type=tags#L38
[3] https://gitlab.com/buildroot.org/buildroot/-/blob/345ccb523e/toolchain/toolchain-external/toolchain-external-bootlin/Config.in.options#L5768-5770
[4] https://toolchains.bootlin.com/downloads/releases/toolchains/x86-i686/fragments/x86-i686--musl--stable-2024.02-1.frag

Signed-off-by: Julien Olivain <ju.o@free.fr>
[Romain: add the link to the Bootlin toolchain fragment]
Signed-off-by: Romain Naour <romain.naour@smile.fr>
(cherry picked from commit 1263adf7a9)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Julien Olivain 2024-05-21 23:38:14 +02:00 committed by Peter Korsgaard
parent 30cb9d9f90
commit bf952b0cb7
1 changed files with 1 additions and 0 deletions
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support/config-fragments/autobuild/bootlin-x86-i686-musl.config
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@ -1,4 +1,5 @@
BR2_i386=y
BR2_x86_i686=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_X86_I686_MUSL_STABLE=y