Re: ESP32

[Aris Adamantiadis <aris@xxxxxxxxxxxx>]

Hi Greg,

This is not an easy task. Compilers for embedded architectures have
strong limitations, and the OS (are you using RTOS?) is quite limited
and not strict POSIX. A majority of errors you pasted can be linked to
the lack of OpenSSL headers in your include path. Did you manage to run
CMake on the source tree? If not, you will have to manually write the
config.h file.
Some parts of libssh may be stripped out, like the agent, but some parts
cannot be removed.

Aris

On 29/03/17 19:19, Greg Stewart wrote:
> Hello. I am trying to get libssh to work on an ESP32. This is a new
> ble+wifi modules with MCU from Espressif. It is gaining popularity,
> and I would love to use libssh from the esp32. When I begin, I get
> this error:
>
>     libssh/include/libssh/libssh.h:67:44: fatal error: sys/select.h
>
> If I comment out that line, the header files are fine. I then try to
> compile all of the c files and I get lots of errors. They are found at
> the end of the email.
>
> Is there something I need to do to make this work? I've worked with
> Espressif too, and they said they have done all they can to help.
>
> Thanks,
> Greg
>
>
>
>
> In file included from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/src/agent.c:53:0:
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/priv.h:42:4:
> error: #error "no strtoull function found"
>
>  #  error "no strtoull function found"
>
>     ^
>
> In file included from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/src/agent.c:53:0:
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/priv.h:165:4:
> error: #error "Your system must provide a __func__ macro"
>
>  #  error "Your system must provide a __func__ macro"
>
>     ^
>
> In file included from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/packet.h:24:0,
>
>                  from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/session.h:25,
>
>                  from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/src/agent.c:56:
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:55:1:
> error: unknown type name 'MD5CTX'
>
>  MD5CTX md5_init(void);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:56:17:
> error: unknown type name 'MD5CTX'
>
>  void md5_update(MD5CTX c, const void *data, unsigned long len);
>
>                  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:57:34:
> error: unknown type name 'MD5CTX'
>
>  void md5_final(unsigned char *md,MD5CTX c);
>
>                                   ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:59:1:
> error: unknown type name 'SHACTX'
>
>  SHACTX sha1_init(void);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:60:18:
> error: unknown type name 'SHACTX'
>
>  void sha1_update(SHACTX c, const void *data, unsigned long len);
>
>                   ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:61:35:
> error: unknown type name 'SHACTX'
>
>  void sha1_final(unsigned char *md,SHACTX c);
>
>                                    ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:64:1:
> error: unknown type name 'SHA256CTX'
>
>  SHA256CTX sha256_init(void);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:65:20:
> error: unknown type name 'SHA256CTX'
>
>  void sha256_update(SHA256CTX c, const void *data, unsigned long len);
>
>                     ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:66:37:
> error: unknown type name 'SHA256CTX'
>
>  void sha256_final(unsigned char *md,SHA256CTX c);
>
>                                      ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:69:1:
> error: unknown type name 'SHA384CTX'
>
>  SHA384CTX sha384_init(void);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:70:20:
> error: unknown type name 'SHA384CTX'
>
>  void sha384_update(SHA384CTX c, const void *data, unsigned long len);
>
>                     ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:71:37:
> error: unknown type name 'SHA384CTX'
>
>  void sha384_final(unsigned char *md,SHA384CTX c);
>
>                                      ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:74:1:
> error: unknown type name 'SHA512CTX'
>
>  SHA512CTX sha512_init(void);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:75:20:
> error: unknown type name 'SHA512CTX'
>
>  void sha512_update(SHA512CTX c, const void *data, unsigned long len);
>
>                     ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:76:37:
> error: unknown type name 'SHA512CTX'
>
>  void sha512_final(unsigned char *md,SHA512CTX c);
>
>                                      ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:80:1:
> error: unknown type name 'EVPCTX'
>
>  EVPCTX evp_init(int nid);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:81:17:
> error: unknown type name 'EVPCTX'
>
>  void evp_update(EVPCTX ctx, const void *data, unsigned long len);
>
>                  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:82:16:
> error: unknown type name 'EVPCTX'
>
>  void evp_final(EVPCTX ctx, unsigned char *md, unsigned int *mdlen);
>
>                 ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:88:1:
> error: unknown type name 'HMACCTX'
>
>  HMACCTX hmac_init(const void *key,int len, enum ssh_hmac_e type);
>
>  ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:89:18:
> error: unknown type name 'HMACCTX'
>
>  void hmac_update(HMACCTX c, const void *data, unsigned long len);
>
>                   ^
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/wrapper.h:90:17:
> error: unknown type name 'HMACCTX'
>
>  void hmac_final(HMACCTX ctx,unsigned char *hashmacbuf,unsigned int *len);
>
>                  ^
>
> In file included from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/pki.h:32:0,
>
>                  from
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/src/agent.c:58:
>
> /Users/Greg/Documents/StewartTech/esp32/workspace/cp25g1/components/libssh/include/libssh/crypto.h:77:5:
> error: unknown type name 'bignum'
>
>      bignum e,f,x,k,y;
>
>      ^
>
> make[1]: *** [src/agent.o] Error 1
>
>     make: *** [libssh-build] Error 2 
>