diff --git a/src/kernel/emulation/linux/bsdthread/bsdthread_create.c b/src/kernel/emulation/linux/bsdthread/bsdthread_create.c
index 804276227..b0c5ba1e8 100644
--- a/src/kernel/emulation/linux/bsdthread/bsdthread_create.c
+++ b/src/kernel/emulation/linux/bsdthread/bsdthread_create.c
@@ -74,6 +74,7 @@ void* thread_stack_allocate(unsigned long stacksize)
 	return (void*) (((uintptr_t)stack) + stacksize + STACK_GUARD_SIZE);
 }
 
+#if 0
 int darling_thread_create(void** stack, void* entry_point, uintptr_t arg3,
 		uintptr_t arg4, uintptr_t arg5, uintptr_t arg6)
 {
@@ -115,5 +116,6 @@ int darling_thread_create(void** stack, void* entry_point, uintptr_t arg3,
 #endif
 	return ret;
 }
+#endif
 
 
diff --git a/src/kernel/emulation/linux/ioctl/ioctl.c b/src/kernel/emulation/linux/ioctl/ioctl.c
index 60cc8579f..b62cdb694 100644
--- a/src/kernel/emulation/linux/ioctl/ioctl.c
+++ b/src/kernel/emulation/linux/ioctl/ioctl.c
@@ -27,7 +27,7 @@ run_ioctl:
 }
 
 extern int sprintf(char* buf, const char* fmt, ...);
-extern int strncmp(const char *, const char *, unsigned long);
+extern int strncmp(const char *, const char *, __SIZE_TYPE__);
 static bool get_fd_path(int fd, char* buf, size_t len)
 {
 	char proc[32];
diff --git a/src/kernel/emulation/linux/misc/sysctl.c b/src/kernel/emulation/linux/misc/sysctl.c
index dadc44b6e..c3d4f680d 100644
--- a/src/kernel/emulation/linux/misc/sysctl.c
+++ b/src/kernel/emulation/linux/misc/sysctl.c
@@ -20,7 +20,7 @@ static long sysctl_name_to_oid(const char* name, int* oid_name,
 		unsigned long* oid_len);
 
 extern char *strchr(const char *s, int c);
-extern int strncmp(const char *s1, const char *s2, unsigned long n);
+extern int strncmp(const char *s1, const char *s2, __SIZE_TYPE__ n);
 extern int strcmp(const char *s1, const char *s2);
 extern kern_return_t mach_port_deallocate(ipc_space_t task, mach_port_name_t name);
 extern kern_return_t host_info(mach_port_name_t host, int itype, void* hinfo, mach_msg_type_number_t* count);
diff --git a/src/kernel/emulation/linux/network/connect.c b/src/kernel/emulation/linux/network/connect.c
index 89cdcaf71..893fa641f 100644
--- a/src/kernel/emulation/linux/network/connect.c
+++ b/src/kernel/emulation/linux/network/connect.c
@@ -6,7 +6,7 @@
 #include "../../../../../platform-include/sys/errno.h"
 #include "duct.h"
 
-extern void *memcpy(void *dest, const void *src, unsigned long n);
+extern void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n);
 
 long sys_connect(int fd, const void* name, int socklen)
 {
diff --git a/src/kernel/emulation/linux/network/recvfrom.c b/src/kernel/emulation/linux/network/recvfrom.c
index ae0152f2b..704cd93d1 100644
--- a/src/kernel/emulation/linux/network/recvfrom.c
+++ b/src/kernel/emulation/linux/network/recvfrom.c
@@ -6,7 +6,7 @@
 #include "socket.h"
 #include "duct.h"
 
-extern void *memcpy(void *dest, const void *src, unsigned long n);
+extern void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n);
 
 long sys_recvfrom(int fd, void* buf, unsigned long len,
 		int flags, const void* from, int* socklen)
diff --git a/src/kernel/emulation/linux/network/recvmsg.c b/src/kernel/emulation/linux/network/recvmsg.c
index 91eb727df..30054de59 100644
--- a/src/kernel/emulation/linux/network/recvmsg.c
+++ b/src/kernel/emulation/linux/network/recvmsg.c
@@ -5,9 +5,9 @@
 #include <stddef.h>
 #include "duct.h"
 
-extern void *malloc(unsigned long size);
+extern void *malloc(__SIZE_TYPE__ size);
 extern void free(void* ptr);
-extern void* memcpy(void* dest, const void* src, unsigned long len);
+extern void* memcpy(void* dest, const void* src, __SIZE_TYPE__ len);
 
 long sys_recvmsg(int socket, struct bsd_msghdr* msg, int flags)
 {
diff --git a/src/kernel/emulation/linux/network/sendmsg.c b/src/kernel/emulation/linux/network/sendmsg.c
index b48a433b5..d21f7db57 100644
--- a/src/kernel/emulation/linux/network/sendmsg.c
+++ b/src/kernel/emulation/linux/network/sendmsg.c
@@ -5,9 +5,9 @@
 #include <stddef.h>
 #include "duct.h"
 
-extern void *malloc(unsigned long size);
+extern void *malloc(__SIZE_TYPE__ size);
 extern void free(void* ptr);
-extern void* memcpy(void* dest, const void* src, unsigned long len);
+extern void* memcpy(void* dest, const void* src, __SIZE_TYPE__ len);
 
 long sys_sendmsg(int socket, const struct bsd_msghdr* msg, int flags)
 {
diff --git a/src/kernel/emulation/linux/signal/sigaction.c b/src/kernel/emulation/linux/signal/sigaction.c
index 33030c9d3..a81230108 100644
--- a/src/kernel/emulation/linux/signal/sigaction.c
+++ b/src/kernel/emulation/linux/signal/sigaction.c
@@ -11,7 +11,7 @@ static int sigflags_bsd_to_linux(int flags);
 static int sigflags_linux_to_bsd(int flags);
 extern void sig_restorer(void);
 
-extern void* memcpy(void* dest, const void* src, unsigned long len);
+extern void* memcpy(void* dest, const void* src, __SIZE_TYPE__ len);
 
 // Libc uses only one trampoline
 void (*sa_tramp)(void*, int, int, struct bsd_siginfo*, void*) = 0;
diff --git a/src/kernel/emulation/linux/simple.c b/src/kernel/emulation/linux/simple.c
index 355a7d204..483e20244 100644
--- a/src/kernel/emulation/linux/simple.c
+++ b/src/kernel/emulation/linux/simple.c
@@ -117,10 +117,10 @@ void __simple_printf(const char* format, ...)
 	LINUX_SYSCALL3(__NR_write, 1, buffer, __simple_strlen(buffer));
 }
 
-extern void *memmove(void *dest, const void *src, unsigned long n);
-extern void *memcpy(void *dest, const void *src, unsigned long n);
-extern void *memchr(const void *s, int c, unsigned long n);
-extern long sys_read(int fd, void* buf, unsigned long n);
+extern void *memmove(void *dest, const void *src, __SIZE_TYPE__ n);
+extern void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n);
+extern void *memchr(const void *s, int c, __SIZE_TYPE__ n);
+extern long sys_read(int fd, void* buf, __SIZE_TYPE__ n);
 
 #ifndef min
 #	define min(a,b) ((a) < (b) ? (a) : (b))
diff --git a/src/kernel/emulation/linux/stat/fstatfs.c b/src/kernel/emulation/linux/stat/fstatfs.c
index 3f28225aa..9a6643e28 100644
--- a/src/kernel/emulation/linux/stat/fstatfs.c
+++ b/src/kernel/emulation/linux/stat/fstatfs.c
@@ -11,9 +11,9 @@
 #include <stddef.h>
 
 extern char *strtok_r(char *str, const char *delim, char **saveptr);
-extern unsigned long strlcpy(char* dst, const char* src, unsigned long size);
-extern unsigned long strlen(const char* str);
-extern int strncmp(const char* s1, const char* s2, unsigned long len);
+extern __SIZE_TYPE__ strlcpy(char* dst, const char* src, __SIZE_TYPE__ size);
+extern __SIZE_TYPE__ strlen(const char* str);
+extern int strncmp(const char* s1, const char* s2, __SIZE_TYPE__ len);
 extern int sprintf(char *str, const char *format, ...);
 
 long sys_fstatfs(int fd, struct bsd_statfs* buf)
diff --git a/src/kernel/emulation/linux/stat/statfs.c b/src/kernel/emulation/linux/stat/statfs.c
index a7e6782c5..82a1475b2 100644
--- a/src/kernel/emulation/linux/stat/statfs.c
+++ b/src/kernel/emulation/linux/stat/statfs.c
@@ -10,9 +10,9 @@
 #include <stddef.h>
 
 extern char *strtok_r(char *str, const char *delim, char **saveptr);
-extern unsigned long strlcpy(char* dst, const char* src, unsigned long size);
-extern unsigned long strlen(const char* str);
-extern int strncmp(const char* s1, const char* s2, unsigned long len);
+extern __SIZE_TYPE__ strlcpy(char* dst, const char* src, __SIZE_TYPE__ size);
+extern __SIZE_TYPE__ strlen(const char* str);
+extern int strncmp(const char* s1, const char* s2, __SIZE_TYPE__ len);
 
 long sys_statfs(const char* path, struct bsd_statfs* buf)
 {