libheif-hs-0.1.0.0: cbits/wasi_posix_stubs.c

#if defined(__wasi__)

// Provide missing POSIX file functions for WASI
typedef int sem_t;

inline int mkstemp(char* template_name) {
    return -1; // Always return -1 (error) so libheif knows the file wasn't created
}

#endif