<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/86369>86369</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [lld] why does lld export hidden symbols without warning?
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            lld
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Zhenhang1213
      </td>
    </tr>
</table>

<pre>
    When I compile .o with two c files -fvisibility=hidden，and a.c depends on a function of b.c. then generates bit dynamic libraries of a.c, Finally define a main function in the new file to generate executable files together, there will be an error using ld, but not lld.

code:
a.c:
`#include<stdio.h>
#include"app.h"

int main1(void) {
    printf("main1\n");
    return 0;
}
`
a.h:
`int main1(void);`
b.c:
`#include<stdio.h>
#include"app.h"

extern int main1();

int shared1(void) {
      printf("shared1\n");
      main1();
      return 0;
}
`
main.c:
`int main(void) {
    return 0;
}
`
and the compiler Commands is:
```
clang -fvisibility=hidden -o a.o  -c a.c
clang -fvisibility=hidden -o main.o  -c main.c
clang -fvisibility=hidden -o b.o  -c b.c
clang -shared -Wl,-soname,liba.so -o a.so a.o
clang -fuse-ld=lld  -o main.out  main.o b.o liba.so
```
error:
`/usr/bin/ld: main.out: hidden symbol `main1' in app.o is referenced by DSO
/usr/bin/ld: final link failed: bad valu`

without any error or warning:
clang -fuse-ld=lld  -o main.out  main.o b.o liba.so



</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJysVU2vqzYQ_TXOZhQEJgSyYPFu8pC66qKLJ3Vn4wlMa-zINsnNv68M5KvKla7UShEQfGbmzJkPhPfUGcSaFR-sOKzEGHrr6j97NL0wXcazfCWtuta_ejTwG7R2OJFGSCxcKPQQLhZaOJJGD-vjmTxJ0hSuLD_0pBQa9rNhH3tW7YVRIJIWFJ7QKA_WgIDjaNpA1oA9gkzaBEIM06FBJwJ6kBRAXY0YqAVN0glH6CNYJC3je2jICK2voPBIBkHAIMg8vJKJDsHgZaIIwd59A35iOwYhNS70g-0w9Oii33hHuJDWIBGEAXTOOhg9mQ60ihA5BjA2gNYqYemBpT_ma2sVsnz5E2nentk2ZTwn0-oxIvY-KLJJz_Kfy_njkHNxOiU94_zZM5kw5ZcxXp0tKcZ3wMqP-RAA4OTIhCPjFeN8BhZ7E53wHcufcA7D6Ayk95esPDw4LsT7Z-JvQkfjG1r-n2niZ0AXa_cI-ZzAQwvfC4fqSzVe9biB3ysCb0PNJ99QKxq_SnBj_xW575TAqKl7l5FzsLfDIOLokH9Re_7NzaeF6d4PIqwtiMQCrNtper6Dn_KaTZYUv2MlFxP5L_xcAlj_0ozv194aMSDje01SJN7O_PxE8jXM6HGtFcsPWit40BoD3AjGiIubt7JM0_vaoc3oHeONjCVqovcfd7fxecnGXwdpNbBtuvRHGXdK7FoL5MHhER2aFhXIKxz--P3W4m-8H-OqAk3mbzgK0ji9lELBWejxznS-xtUa8xPmumwe6-AinCHT3dP4L_I8XVeqztUu34kV1lmZZdk2q6pi1ddlIbdZijnmxW6X7Xglq6wqMZVbLKsqxxXVPOWbNOd5yjebTZEUeVm2qEqV55lsC8k2KQ6CdKL1eUis61bk_Yh1tc23u5UWErWfPjyc67hUefwCuTqi13LsPNukmnzwD_tAQU_fqogvDnDpr6As-riFAT9P1oXX0nm4aXmXr1mNTtd9CKdpjHjDeNNR6EeZtHaI9dLn2219cvYvbAPjzUTdM95M7P8JAAD__1tZKbs">