| Issue |
91460
|
| Summary |
[lld] --exclude-libs,ALL fails to work with both lto and version script is on
|
| Labels |
lld
|
| Assignees |
|
| Reporter |
mvpjox2233
|
I tried to build my project with both lto, version script and exclude-libs,ALL. The result shows that the symbol in static library is global in the output file. I also tried with gcc and the same symbol is local.
Here is my test:
```
#====a.cpp====
#include <stdio.h>
void a()
{
printf("func a\n");
}
#====b.cpp====
#include <stdio.h>
void b()
{
printf("func b\n");
}
#====c.cpp====
#include <stdio.h>
void c()
{
printf("func c\n");
}
#====main.cpp====
#include <stdio.h>
void a();
void b();
void c();
int main()
{
a();
b();
c();
printf("func main\n");
}
#====map.txt====
{
global:
extern "C++" {
a*;
b*;
c*;
};
local:
*;
};
```
build command:
```
CC=/usr/workspace/clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04/bin/clang++
AR=/usr/workspace/clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04/bin/llvm-ar
${CC} -c a.cpp -flto -fvisibility=default -o a.lto
${CC} -c b.cpp -flto -fvisibility=default -o b.lto
${CC} -c c.cpp -flto -fvisibility=default -o c.lto
${CC} -c main.cpp -flto -fvisibility=default -o main.lto
${AR} -cr s.lta a.lto b.lto c.lto
${CC} -flto main.lto -Wl,--whole-archive s.lta -Wl,--no-whole-archive -shared -o main.ltout -fvisibility=default -Wl,--exclude-libs,ALL -fuse-ld=lld
```
The symbol table of `main.ltout` is :
```
6: 0000000000001680 20 FUNC GLOBAL DEFAULT 11 _Z1av
7: 00000000000016a0 20 FUNC GLOBAL DEFAULT 11 _Z1bv
8: 00000000000016c0 20 FUNC GLOBAL DEFAULT 11 _Z1cv
```
With `CC=g++` and `AR=ar` in build command, the symbol table can be:
```
11: 0000000000001146 26 FUNC LOCAL DEFAULT 14 _Z1av
12: 0000000000001160 26 FUNC LOCAL DEFAULT 14 _Z1bv
13: 000000000000117a 26 FUNC LOCAL DEFAULT 14 _Z1cv
```
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