- ci/ci.sh: new ICEBERG environment variable, printed in the
reproduction header and passed to configure as
--enable-module-iceberg (mirroring CHILLDKG); bench_iceberg runs in
the bench step when the module is enabled, as in the source tree's
CI.
- .github/workflows/ci.yml: ICEBERG: 'no' default; ICEBERG: 'yes' in
the 20 jobs that enable musig + schnorrsig + experimental (the same
jobs that build chilldkg). Jobs that deliberately build without
musig or its dependencies are left at 'no'. Verified
programmatically: the YAML parses and every ICEBERG: 'yes' context
also has MUSIG, SCHNORRSIG and EXPERIMENTAL set to 'yes'.
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