Question

I’m having trouble with some very basic static library linking in C. The library is libMMS 0.6.2, and the program is as simple as I could make it. libmms.a and test.c are in the same folder, with the header files under ./libmms. The compiler is llvm-gcc-4.2 under OS X Lion.

compiling libmms:

CFLAGS="-march=x86_64" ./configure
make

test.c:

#include <stdio.h>
#include "libmms/mms.h"

int main(void)
{
    mms_t *mms = mms_connect(NULL, NULL, "mms://some.url.com", 128*1024);
    return 0;
}

compiling program:

gcc -o test test.c libmms.a

which gives me a long list of undefined symbols

Undefined symbols for architecture x86_64:
  "_libiconv", referenced from:
      _string_utf16 in libmms.a(mms.o)
  "_libiconv_open", referenced from:
      _mms_connect in libmms.a(mms.o)
  "_libiconv_close", referenced from:
      _mms_connect in libmms.a(mms.o)
  "_g_strdup", referenced from:
      _split_user_passwd in libmms.a(uri.o)
      _gnet_uri_new in libmms.a(uri.o)
      _gnet_uri_new_fields in libmms.a(uri.o)
      _gnet_uri_new_fields_all in libmms.a(uri.o)
      _gnet_uri_clone in libmms.a(uri.o)
      _gnet_uri_set_scheme in libmms.a(uri.o)
      _gnet_uri_set_userinfo in libmms.a(uri.o)
      ...
  "_g_free", referenced from:
      _split_user_passwd in libmms.a(uri.o)
      _gnet_uri_new in libmms.a(uri.o)
      _gnet_uri_delete in libmms.a(uri.o)
      _field_escape in libmms.a(uri.o)
      _gnet_uri_set_scheme in libmms.a(uri.o)
      _gnet_uri_set_userinfo in libmms.a(uri.o)
      _gnet_uri_set_hostname in libmms.a(uri.o)
      ...
  "_g_return_if_fail_warning", referenced from:
      _gnet_uri_new in libmms.a(uri.o)
      _gnet_uri_clone in libmms.a(uri.o)
      _gnet_uri_equal in libmms.a(uri.o)
      _gnet_uri_hash in libmms.a(uri.o)
      _gnet_uri_escape in libmms.a(uri.o)
      _gnet_uri_unescape in libmms.a(uri.o)
      _gnet_uri_get_string in libmms.a(uri.o)
      ...
  "_g_malloc0_n", referenced from:
      _gnet_uri_new in libmms.a(uri.o)
      _gnet_uri_new_fields in libmms.a(uri.o)
      _gnet_uri_new_fields_all in libmms.a(uri.o)
      _gnet_uri_clone in libmms.a(uri.o)
  "_g_strndup", referenced from:
      _gnet_uri_new in libmms.a(uri.o)
  "_g_str_hash", referenced from:
      _gnet_uri_hash in libmms.a(uri.o)
  "_g_malloc", referenced from:
      _field_escape in libmms.a(uri.o)
  "_g_string_sized_new", referenced from:
      _gnet_uri_get_string in libmms.a(uri.o)
  "_g_string_append_printf", referenced from:
      _gnet_uri_get_string in libmms.a(uri.o)
  "_g_string_append", referenced from:
      _gnet_uri_get_string in libmms.a(uri.o)
  "_g_string_free", referenced from:
      _gnet_uri_get_string in libmms.a(uri.o)
  "_g_string_insert_c", referenced from:
      _g_string_append_c_inline in libmms.a(uri.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

Am I missing something simple here?

Answer 1

It seems that libmms depends on both libiconv and glib, so you’ll need to link those as well.