Unable to build a S3 client

[quaaanLee]

When I build my S3 client, I meet the complain like this:

aws-sdk-cpp/crt/aws-crt-cpp/crt/s2n/crypto/s2n_ktls_crypto.h:55:48: error: field ‘aes_gcm_256’ has incomplete type
   55 |         s2n_ktls_crypto_info_tls12_aes_gcm_256 aes_gcm_256;

while I find that it is defined right before in this header file:

#if defined(S2N_KTLS_SUPPORTED)
    #include <linux/tls.h>

    typedef struct tls12_crypto_info_aes_gcm_128 s2n_ktls_crypto_info_tls12_aes_gcm_128;
    typedef struct tls12_crypto_info_aes_gcm_256 s2n_ktls_crypto_info_tls12_aes_gcm_256;
#else
    #define TLS_1_2_VERSION 0

    #define TLS_CIPHER_AES_GCM_128 0
    typedef struct s2n_ktls_crypto_info_stub s2n_ktls_crypto_info_tls12_aes_gcm_128;
    #define TLS_CIPHER_AES_GCM_256 0
    typedef struct s2n_ktls_crypto_info_stub s2n_ktls_crypto_info_tls12_aes_gcm_256;
#endif

I use compile command like this:

cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=./awssdk -DBUILD_ONLY="s3" -DBUILD_SHARED_LIBS=0;

make -j16  // I meet problem when i execute this

Has anybody meet the same problem?
Help me please, thanks a lot

[quaaanLee]

I found that my kernel version is too old and the tls.h header file does not contain TLS_CIPHER_AES_GCM_256 and tls12_crypto_info_aes_gcm_256， so how can I undefine the S2N_KTLS_SUPPORTED once, and make it work across the whole project?

[jmklix]

Can you provide more details about your environment/compiler version/sdk version?

I would suggest trying to build/test s2n-tls on it's own to resolve your issue in isolation. It looks like there are some tests that might help you. In this folder there are some tests that will let you know if S2N_KTLS_SUPPORTED is supported. You can see someone else run them on this issue

-- feature S2N_KTLS_SUPPORTED: FALSE