Android build issue: OPENSSL

[generosocarbone]

I'm trying the build Open-TEE for Android and when I try to build the modules
make clean && make opentee-engine libManagerApi libInternalApi libLauncherApi libCommonApi libta_conn_test_app conn_test_app libtee

I get these errors

Open-TEE/emulator/internal_api/openssl_1_0_2_beta_rsa_oaep.c:121:9: error: incompatible integer to pointer conversion assigning to 'unsigned char *' from 'int' [-Werror,-Wint-conversion] dbmask = OPENSSL_malloc(emlen - mdlen);

and

Open-TEE/emulator/internal_api/openssl_1_0_2_beta_rsa_oaep.c:181:5: error: incompatible integer to pointer conversion assigning to 'unsigned char *' from 'int' [-Werror,-Wint-conversion] db = OPENSSL_malloc(dblen + num);

My workspace

• Ubuntu 17.10 64 bit
• Android source: Android 7.1.2_r28
• Open-TEE built using Autotools