build: update AX_CXX_COMPILE_STDCXX to serial 18 #3494
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Downloaded the latest version available from https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html at the time of writing. This allows configuring for up to c++20.
Prerequisite for getting c++17 to work because the current version (4) only supports up to c++14.