Make build system compatible with autotools 2.71.

The autotools 2.7 suite is starting to be used (Ubuntu and Fedora) and has many incompatible changes for our build system. This MR attempts to resolve those and remain compatible with the earlier and more widely used 2.69.

Works for me on Ubuntu 20.02/2.71 and with Centos/2.69 and Ubuntu/2.69.

Rather than worry about 2.7, it would seem a good idea to make sure 2.69 is still working for all the configure combinations we can. Access to less obvious OSes would also be useful tests.

Also closes #536 (closed).

added Configuration enhancement feature request labels

assigned to @pdraper

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• e93c2516 - Tweaks for autotools 2.69 compatibility

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Issue #536 (closed) might be partially addressed or fully solved by this as well.

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• 067e9a56 - One too many AC_PROG_CC references are not allowed

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added 28 commits

• 067e9a56...eb22731a - 27 commits from branch master
• 017743f0 - Merge branch 'master' into autoconf-2.71

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changed the description

marked this merge request as ready

changed title from Draft: Updates for autoconf-2.71. to Updates to make build system compatible with autotools 2.71.

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requested review from @bvandenbroucke

assigned to @matthieu and unassigned @pdraper

changed title from Updates to make build system compatible with autotools 2.71. to Make build system compatible with autotools 2.71.

changed the description

added 1 commit

• a65af802 - Fixes issue with headers that cannot be compiled, but are present. This...

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OK, ready as far as I'm concerned now. Low priority, but nice to have for the laptop/desktop developers.

That does work with 2.69 and 2.71 on my machine.

approved this merge request