On 23. Sep 2019, at 19:42, John Maddock via Boost wrote:

Has anyone figured out how to install clang-9 on travis?

I'm seeing:

Adding APT Sources

Disallowing sources: llvm-toolchain-xenial-9

See https://travis-ci.org/boostorg/multiprecision/jobs/588146074

With .travis.yml containing:

- os: linux env: TOOLSET=clang COMPILER=clang++-9 CXXSTD=c++17 TEST_SUITE=misc addons: apt: packages: - clang-9 - libgmp-dev - libmpfr-dev - libmpc-dev - libmpfi-dev sources: - ubuntu-toolchain-r-test - llvm-toolchain-xenial-9

Which works fine for clang-8. Any ideas anyone?

Currently, you can use: apt: sources: - ubuntu-toolchain-r-test - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main' key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key' packages: - clang-9 See https://github.com/taocpp/sequences/blob/master/.travis.yml Daniel