Include liburing in static build

src/liburing/syscall.h

@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef LIBURING_SYSCALL_H
+#define LIBURING_SYSCALL_H
+
+#include <errno.h>
+#include <signal.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <sys/resource.h>
+#include <liburing.h>
+
+/*
+ * Don't put this below the #include "arch/$arch/syscall.h", that
+ * file may need it.
+ */
+struct io_uring_params;
+
+static inline void *ERR_PTR(intptr_t n)
+{
+	return (void *) n;
+}
+
+static inline int PTR_ERR(const void *ptr)
+{
+	return (int) (intptr_t) ptr;
+}
+
+static inline bool IS_ERR(const void *ptr)
+{
+	return uring_unlikely((uintptr_t) ptr >= (uintptr_t) -4095UL);
+}
+
+#if defined(__x86_64__) || defined(__i386__)
+#include "arch/x86/syscall.h"
+#elif defined(__aarch64__)
+#include "arch/aarch64/syscall.h"
+#elif defined(__riscv) && __riscv_xlen == 64
+#include "arch/riscv64/syscall.h"
+#else
+/*
+ * We don't have native syscall wrappers
+ * for this arch. Must use libc!
+ */
+#ifdef CONFIG_NOLIBC
+	#error "This arch doesn't support building liburing without libc"
+#endif
+/* libc syscall wrappers. */
+#include "arch/generic/syscall.h"
+#endif
+#endif