Error compiling sources on Ubuntu

[Bruno Buzzi Brassesco <bruno.brasesco@xxxxxxxxx>]

Hi,
I have compiled libssh on a fresh Ubuntu witthout problems.
Now the same steps fail on a test environment (same Ubuntu version).
The error attached below is rare because it seems a bad/missing function
declaration.
Has Anyone experienced this error before ?

/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:890:13: error: implicit
declaration of function ‘EVP_PKEY_base_id’
[-Werror=implicit-function-declaration]
     switch (EVP_PKEY_base_id(pkey)) {
             ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c: In function ‘pki_sign_data’:
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2140:10: error: implicit
declaration of function ‘EVP_DigestSignInit’
[-Werror=implicit-function-declaration]
     rc = EVP_DigestSignInit(ctx, NULL, md, NULL, pkey);
          ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2157:10: error: implicit
declaration of function ‘EVP_DigestSignUpdate’
[-Werror=implicit-function-declaration]
     rc = EVP_DigestSignUpdate(ctx, input, input_len);
          ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2165:10: error: implicit
declaration of function ‘EVP_DigestSignFinal’
[-Werror=implicit-function-declaration]
     rc = EVP_DigestSignFinal(ctx, raw_sig_data, &raw_sig_len);
          ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c: In function
‘pki_verify_data_signature’:
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2301:14: error: implicit
declaration of function ‘EVP_DigestVerifyInit’
[-Werror=implicit-function-declaration]
     evp_rc = EVP_DigestVerifyInit(ctx, NULL, md, NULL, pkey);
              ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2312:14: error: implicit
declaration of function ‘EVP_DigestVerifyUpdate’
[-Werror=implicit-function-declaration]
     evp_rc = EVP_DigestVerifyUpdate(ctx, input, input_len);
              ^
/gemstone/temp/libssh-0.9.4/src/pki_crypto.c:2320:14: error: implicit
declaration of function ‘EVP_DigestVerifyFinal’
[-Werror=implicit-function-declaration]
     evp_rc = EVP_DigestVerifyFinal(ctx, raw_sig_data, raw_sig_len);
              ^
cc1: some warnings being treated as errors
src/CMakeFiles/ssh.dir/build.make:1286: recipe for target
'src/CMakeFiles/ssh.dir/pki_crypto.c.o' failed
make[2]: *** [src/CMakeFiles/ssh.dir/pki_crypto.c.o] Error 1
CMakeFiles/Makefile2:171: recipe for target 'src/CMakeFiles/ssh.dir/all'
failed
make[1]: *** [src/CMakeFiles/ssh.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2