With secp256k1 not available on the machine (on Linux delete `electrum/electrumabc/libsecp256k1.so.0`)
```
$ ./electrum-abc -v
[secp256k1] warning: libsecp256k1 library failed to load
[secp256k1] warning: loading from /home/pablo/dev/bitcoin-abc/electrum/electrumabc/libsecp256k1.so.0 failed with: /home/pierre/dev/bitcoin-abc/electrum/electrumabc/libsecp256k1.so.0: cannot open shared object file: No such file or directory
[secp256k1] warning: loading from libsecp256k1.so.0 failed with: libsecp256k1.so.0: cannot open shared object file: No such file or directory
[ecc] info: libsecp256k1 library not available, falling back to python-ecdsa. This means signing operations will be slower. Try running:
...
```
without this diff, the output is less verbose and less useful:
```
$ ./electrum-abc -v
[secp256k1] warning: libsecp256k1 library failed to load
[ecc] info: libsecp256k1 library not available, falling back to python-ecdsa. This means signing operations will be slower. Try running:
```