llvm-toolchain-9 (1:9.0.1-11) unstable; urgency=medium

llvm-toolchain-9 (1:9.0.1-11) unstable; urgency=medium

  * Allow one to build g++ 9 & 10 to fix a gcc build dependency
    (closes: #955144)
    And disable thin lto on all archs
    It needs gcc-8 after after 8 will reject the -flto=thin arg
    And BOOTSTRAP_LLVM_ENABLE_LTO wil generate .so with llvm IR instead
    of native code

[dgit import unpatched llvm-toolchain-9 1:9.0.1-11]