| Issue |
86777
|
| Summary |
[lld] why does lld export hidden symbols without warning when dynamic libraries link to object files?
|
| Labels |
lld
|
| Assignees |
|
| Reporter |
Zhenhang1213
|
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"a.h"
int main1(void) {
printf("main1\n");
return 0;
}
```
a.h:
`int main1(void);`
b.c:
```
#include<stdio.h>
#include"a.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,libb.so -o libb.so b.o
clang -fuse-ld=ld -o main.out main.o a.o libb.so
```
error:
```
/usr/bin/ld: main.out: hidden symbol `main1' in a.o is referenced by DSO
/usr/bin/ld: final link failed: bad value
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
```
without any error or warning:
clang -fuse-ld=lld -o main.out main.o a.o libb.so
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