New comment by subnut on void-packages repository

https://github.com/void-linux/void-packages/pull/36395#issuecomment-1080998712

Comment:
## xbps-src doesn't include `libmbedtls` in dependencies. WHY SO?

### `libmongoose.so` refers to symbols of `libmbedtls.so`
```
$ c99 -O1  -lmongoose  simple_web_server.c   -o simple_web_server
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_set_hostname'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crt_free'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_setup'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crl_parse'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_conf_own_cert'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_set_bio'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_conf_authmode'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crt_parse'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_config_defaults'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crl_free'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_init'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_read'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crl_init'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_config_init'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_pk_init'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_config_free'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_conf_rng'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_pk_free'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_conf_ca_chain'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_write'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_x509_crt_init'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_free'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_pk_parse_key'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_handshake'
/bin/ld: /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/../../../../lib64/libmongoose.so: undefined reference to `mbedtls_ssl_conf_dbg'
collect2: error: ld returned 1 exit status
```
```
$ c99 -o simple_web_server simple_web_server.c -lmongoose -lmbedtls
$ echo $?
0
```

#### `simpleHTTPserver.c`
```c
#include <mongoose.h>

static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
  struct mg_http_serve_opts opts = {.root_dir = "."};   // Serve local dir
  if (ev == MG_EV_HTTP_MSG) mg_http_serve_dir(c, ev_data, &opts);
}

int main(int argc, char *argv[]) {
  struct mg_mgr mgr;
  mg_mgr_init(&mgr);                                        // Init manager
  mg_http_listen(&mgr, "http://localhost:8000", fn, &mgr);  // Setup listener
  for (;;) mg_mgr_poll(&mgr, 1000);                         // Event loop
  mg_mgr_free(&mgr);                                        // Cleanup
  return 0;
}
```