On Wed, 5 Oct 2022, Daniel Hallberg via curl-library wrote:
After some more experimenting I've figured out that the issue seems introduced in 7.79.0 (I can compile 7.78.0, but not 7.79.0)
Countless people have built curl fine with configure since then, including CI jobs for every commit and PR since. I can't figure out what makes your case special!
At around line 2730 in configure.ac it checks if the --with-ngtcp2 option is used, and in your case it isn't and then it shouldn't attempt to use it nor enable HTTP3 in the build.
As I cannot reproduce this on my or any other system, I have a hard time to debug this myself.
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