GCC's Test Suite To Begin Testing C++17 By Default
Written by Michael Larabel in GNU on 17 October 2018 at 05:37 PM EDT. 6 Comments
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GCC's test suite will soon begin testing the C++17 standard as part of its C++98/11/14 standard tests by default... This doesn't affect the default C++ standard used by the GCC G++ compiler at this point, but at least will help eliminate any lingering C++17 bugs as well as helping to stop regressions in the future.

With the GCC test suite's test cases having cleared through the last of the C++17 issues, Marek Polacek of Red Hat sent out the patch today to begin testing C++17 by default when running its test suite. C++17 is tested in addition to the earlier C++98, C++11, and C++14 standards.

GCC developers also continue moving along in their C++2A support and might soon also enable that by default for their test suite. There is some discussion along those lines of potentially dropping C++11 by default at that stage to avoid rather lengthy run times.

The GCC compiler's C++ front-end continues using C++14 (well, the GNU dialect) as its standard C++ target when not overrode via the -std= compiler switch. That will still be the case with the GCC 9.1 stable release due out in a few months time but this C++17 test coverage by default will hopefully ensure solid support for this newer C++ revision and perhaps for GCC 10 we'll see that default bumped... There's been no formal communication about plans on that front for bumping the default C++ standard.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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