serial:start() not accessible

[quantumproducer]

^C~/code/erlang-serial:.which erl
/usr/local/bin/erl

~/code/erlang-serial:.make
gcc   -g    -c -o c_src/serial.o c_src/serial.c
c_src/serial.c:273:16: warning: passing 'char [2]' to parameter of type 'unsigned char *'
      converts between pointers to integer types with different sign [-Wpointer-sign]
  set_tbh_size(header_buf, buffsize);
               ^~~~~~~~~~
c_src/serial.c:253:33: note: passing argument to parameter 'buf' here
void set_tbh_size(unsigned char buf[], int size)
                                ^
c_src/serial.c:611:22: warning: passing 'unsigned char *' to parameter of type
      'const char *' converts between pointers to integer types with different sign
      [-Wpointer-sign]
                    strcpy(ttyname,&buf[HEADERSIZE]);
                    ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
/usr/include/secure/_string.h:83:33: note: expanded from macro 'strcpy'
  __builtin___strcpy_chk (dest, src, __darwin_obsz (dest))
                                ^~~
c_src/serial.c:646:35: warning: passing 'unsigned char *' to parameter of type
      'const char *' converts between pointers to integer types with different sign
      [-Wpointer-sign]
                      in_speed = get_speed(atoi(&buf[HEADERSIZE]));
                                                ^~~~~~~~~~~~~~~~
/usr/include/stdlib.h:132:23: note: passing argument to parameter here
int      atoi(const char *);
                          ^
c_src/serial.c:656:36: warning: passing 'unsigned char *' to parameter of type
      'const char *' converts between pointers to integer types with different sign
      [-Wpointer-sign]
                      out_speed = get_speed(atoi(&buf[off]));
                                                 ^~~~~~~~~
/usr/include/stdlib.h:132:23: note: passing argument to parameter here
int      atoi(const char *);
                          ^
4 warnings generated.
mkdir -p priv/bin
mkdir -p priv/bin
gcc -o priv/bin/serial  c_src/serial.o
mkdir -p ebin
erlc -o ebin src/serial.erl
erlc -o ebin src/slip.erl
~/code/erlang-serial:.DESTDIR=/usr/local/bin make install
install -d /usr/local/bin/erlang/lib/serial-1.1/ebin
install -d /usr/local/bin/erlang/lib/serial-1.1/priv/bin
install -d /usr/local/bin/erlang/lib/serial-1.1/src
install -m 644 ebin/* /usr/local/bin/erlang/lib/serial-1.1/ebin
install -m 755 priv/bin/* /usr/local/bin/erlang/lib/serial-1.1/priv/bin
install -m 644 src/* /usr/local/bin/erlang/lib/serial-1.1/src

~/code/erlang-serial:.erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Eshell V8.2  (abort with ^G)
1> serial:start().
** exception error: undefined function serial:start/0
2>

[tonyg]

I think if you invoke erlang with erl -pa ebin instead of just erl, you should be able to get serial:start() to work.

[quantumproducer]

@tonyg I thought that by installing the source files into my erlang lib folder, such a step becomes unnecessary because they are loaded everytime?

[tonyg]

Oh! Good point! I missed the "install" step in your transcript! Sorry. I'll take another look.

[tonyg]

I think Erlang by default just has /usr/lib/erlang/lib as its library directory. Perhaps either install with make DESTDIR=/usr/lib install, or run with ERL_LIBS=/usr/local/bin/erlang/lib erl. See the section on the "code path" at http://erlang.org/doc/man/code.html for more information.

[tonyg]

Oh, I see you probably have OTPROOT as /usr/local, so for you perhaps

make DESTDIR=/usr/local/lib install

is what's required.

[quantumproducer]

Yes, that gives me a Pid, thank you.