toolchain/toolchain-buildroot: PPC64(LE) support in musl requires ALTIVEC

musl currently assumes all PPC64(LE) CPUs support ALTIVEC instructions.

However, there are exceptions (such as the e5500) for which musl builds
ultimately generate illegal instructions for the targets.

Disable musl if the PPC64(LE) CPU does not support ALTIVEC instructions.

This patch addresses the issues seen here:
  https://gitlab.com/kubu93/toolchains-builder/-/jobs/418092743
  https://gitlab.com/kubu93/toolchains-builder/-/jobs/418092744

musl mailing list thread:
  https://www.openwall.com/lists/musl/2020/02/03/10

Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

diff --git a/toolchain/toolchain-buildroot/Config.in b/toolchain/toolchain-buildroot/Config.in
index a980f766ac147019b3f93e2f76d7b907c5b4b3a2..8c33b2b4ddc067529ab4eb94038ece7bcee94c37 100644 (file)
--- a/toolchain/toolchain-buildroot/Config.in
+++ b/toolchain/toolchain-buildroot/Config.in
@@ -86,6 +86,7 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
                   BR2_mips64el    || BR2_or1k  || BR2_powerpc || BR2_powerpc64 || \
                   BR2_powerpc64le || BR2_RISCV_64 || BR2_sh   || BR2_x86_64
        depends on !BR2_powerpc_SPE # not supported, build breaks
+       depends on !(BR2_powerpc64 || BR2_powerpc64le) || BR2_POWERPC_CPU_HAS_ALTIVEC
        # sh2 nommu is supported by musl, but we don't have support
        # for it in Buildroot.
        depends on BR2_USE_MMU