Hmm... does it really make sense to add such Linux specific functions to
Emscripten? From looking at the MUSL source, it does have an memfd_create
entry point, but that just jumps into the Linux SYS_memfd_create syscall,
so it doesn't work anywhere but on Linux. Suppporting a random collection
of Linux-specific syscalls might be more confusing to Emscripten users than
having a clear definition of what's supposed to work (for instance: only
CRT functions, only POSIX functions up to version X, etc...).
For instance, OP's code doesn't compile on macOS either:
Undefined symbols for architecture arm64:
"_memfd_create", referenced from:
_main in test-26b3ed.o
ld: symbol(s) not found for architecture arm64
Cheers,
-Floh.
On Friday, 14 October 2022 at 23:39:55 UTC+2 [email protected] wrote:
> Emscripten doesn't yet support the memfd_create API. If you need to use
> it you could look into adding support for it (or file a bug to get it
> added). I imagine that most codebased that use that API have some kind of
> cross-platform fallback. Perhaps you could use that instead?
>
> cheers,
> sam
>
> On Fri, Oct 14, 2022 at 3:19 AM Aitha Tarun <[email protected]> wrote:
>
>> Hi, I am unable to use the memfd_create method while building the C
>> script to emscripten.
>> Below I have given my references to reproduce the error.
>>
>> *Code :*
>>
>> #include <stdio.h>
>> #include <sys/mman.h>
>> #include <unistd.h>
>> #include <stdlib.h>
>> #define _GNU_SOURCE
>>
>> int memfd_create(const char *name, unsigned int flags);
>>
>> int main()
>> {
>> int fd = memfd_create("temp", 0);
>>
>> printf("Fd : %d\n", fd);
>>
>> int wrote = write(fd, "Hello", 5);
>>
>> printf("Wrote : %d\n", wrote);
>>
>> char * buf = malloc(5);
>>
>> int red = pread(fd, buf, 5, 0);
>>
>> printf("Read : %d\n", red);
>> printf("Content %s\n", buf);
>> }
>>
>> *Error :*
>>
>> *[image: 1.png]*
>>
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