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build,meta: switch to gcc-4.9 on travis
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The version of `clang` provided in the Travis linux image uses
libstdc++4.8 whice is below our minimal supported version.

Switching to `make test -j1` is to avoid races during the test cycle
causes by the main target being "unstable", that is it always builds
some files, and relinks the binary, which is used by the test procedure.

PR-URL: #23778
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
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refack authored and MylesBorins committed Nov 26, 2018
1 parent aed45d7 commit 8f58eed
Showing 1 changed file with 8 additions and 7 deletions.
15 changes: 8 additions & 7 deletions .travis.yml
Original file line number Diff line number Diff line change
@@ -1,6 +1,4 @@
language: cpp
compiler:
- clang
sudo: false
cache: ccache
os: linux
Expand All @@ -15,12 +13,15 @@ matrix:
# Lint the first commit in the PR.
- \[ -z "$TRAVIS_COMMIT_RANGE" \] || (echo -e '\nLinting the commit message according to the guidelines at https://goo.gl/p2fr5Q\n' && git log $TRAVIS_COMMIT_RANGE --pretty=format:'%h' --no-merges | tail -1 | xargs npx -q core-validate-commit --no-validate-metadata)
- name: "Test Suite"
addons:
apt:
sources:
- ubuntu-toolchain-r-test
packages:
- g++-4.9
install:
- export CC='ccache gcc-4.9' CXX='ccache g++-4.9' JOBS=2
- ./configure
- make -j2 V=
script:
- make -j2 test
before_install:
- export CXX="ccache clang++ -Qunused-arguments"
- export CC="ccache clang -Qunused-arguments -Wno-unknown-warning-option"
- export JOBS=2
- PARALLEL_ARGS='--flaky-tests=skip' make -j1 test

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