[erlang-questions] [centos-7]With newer Erlang versions has the eliptic curve crypto situation changed?

[Bryan Hunt]

Hi,

Before, when building OTP I always set the compile time option to disable elliptic curve cryptography using the 
CFLAGS environmental variable (RHEL doesn’t ship with it) : 

```
export CFLAGS="-DOPENSSL_NO_EC=1"
./otp_build configure  \
        --without-odbc \
        --without-cosEventDomain \
        --without-cosEvent \
        --without-cosFileTransfer \
        --without-cosNotification \
        --without-cosProperty \
        --without-cosTime \
        --without-cosTransactions \
        --without-debugger \
        --without-et \
        --without-gs \
        --without-ic \
        --without-javac \
        --without-jinterface \
        --without-megaco \
        --without-observer \
        --without-orber \
        --without-percept \
        --without-typer \
        --without-wx \
        --without-tv \
        --without-diameter \
        --without-hipe
```

And that still works for the older versions. 

But when applied to OTP-21.0-rc1 I receive the following error : 

```
gmake[6]: Entering directory `/root/otp/lib/crypto/c_src'
 CC     ../priv/obj/x86_64-unknown-linux-gnu/crypto.o
In file included from /usr/include/openssl/ecdh.h:78:0,
                 from /usr/include/openssl/engine.h:86,
                 from crypto.c:63:
/usr/include/openssl/ec.h:82:4: error: #error EC is disabled.
 #  error EC is disabled.
    ^
gmake[6]: Leaving directory `/root/otp/lib/crypto/c_src'
gmake[6]: *** [../priv/obj/x86_64-unknown-linux-gnu/crypto.o] Error 1
gmake[5]: *** [release_spec] Error 2
gmake[5]: Leaving directory `/root/otp/lib/crypto/c_src'
gmake[4]: *** [release] Error 2
gmake[4]: Leaving directory `/root/otp/lib/crypto/c_src'
gmake[3]: *** [release] Error 2
gmake[3]: Leaving directory `/root/otp/lib/crypto/c_src'
gmake[2]: *** [release] Error 2
gmake[2]: Leaving directory `/root/otp/lib/crypto'
gmake[1]: Leaving directory `/root/otp/lib'
gmake[1]: *** [release] Error 2
gmake: *** [release] Error 2
The command '/bin/sh -c ./build-erlang.sh' returned a non-zero code: 1
Unable to find image 'bryanhuntesl/centos7-erlang:OTP-21.0-rc1' locally
docker: Error response from daemon: manifest for bryanhuntesl/centos7-erlang:OTP-21.0-rc1 not found.
See 'docker run --help’.
```

Has this behaviour changed recently ?

Bryan