| Issue |
128026
|
| Summary |
Clang fails to allow malloc attribute to accept arguments.
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
scamp-nvidia
|
It appears that Clang fails to allow malloc attribute to accept arguments.
Sample code:
test.c:
```
typedef long unsigned int size_t;
extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size);
extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
__attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__ (reallocarray, 1)));
```
Compiling with gcc version 14.1 and NVHPC's nvc version 25.1 works fine, but building with latest clang fails.
```
scamp@dev-sky5:~$ gcc test.c -c
scamp@dev-sky5:~$ nvc test.c -c
scamp@dev-sky5:~$ clang test.c -c
test.c:5:63: error: '__malloc__' attribute takes no arguments
5 | __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__ (reallocarray, 1)));
| ^
1 error generated.
```
For reference:
```
scamp@dev-sky5:~$ clang --version
clang version 21.0.0git (https://github.com/llvm/llvm-project 557628dbe6a935b1ad5e1bcfd51ac3a65e35d874)
```
We have recently run into this error in trying to get a large weather code ported to running with Clang.
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