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musl libc has a different interface
--- a/modules/access/v4l2/lib.c
+++ b/modules/access/v4l2/lib.c
@@ -49,7 +49,7 @@ static int (*v4l2_fd_open_cb)(int, int) = fd_open;
//int (*v4l2_open) (const char *, int, ...) = open;
//int (*v4l2_dup) (const char *, int, ...) = dup;
int (*v4l2_close) (int) = close;
-int (*v4l2_ioctl) (int, unsigned long int, ...) = ioctl;
+int (*v4l2_ioctl) (int, int, ...) = ioctl;
ssize_t (*v4l2_read) (int, void *, size_t) = read;
//ssize_t (*v4l2_write) (int, const void *, size_t) = write;
void * (*v4l2_mmap) (void *, size_t, int, int, int, int64_t) = mmap;
--- a/modules/access/v4l2/v4l2.h
+++ b/modules/access/v4l2/v4l2.h
@@ -28,7 +28,7 @@
/* libv4l2 functions */
extern int v4l2_fd_open(int, int);
extern int (*v4l2_close) (int);
-extern int (*v4l2_ioctl) (int, unsigned long int, ...);
+extern int (*v4l2_ioctl) (int, int, ...);
extern ssize_t (*v4l2_read) (int, void *, size_t);
extern void * (*v4l2_mmap) (void *, size_t, int, int, int, int64_t);
extern int (*v4l2_munmap) (void *, size_t);
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