diff --git a/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch b/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch
deleted file mode 100644
index 06aeb34ced..0000000000
--- a/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch
+++ /dev/null
@@ -1,197 +0,0 @@
-From e6683d001a95d7c3d4d992496f00f77e01fcd268 Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Sun, 22 Nov 2015 15:04:23 +0100
-Subject: [PATCH v2] Add format attribute to some function declarations
-
-GCC and Clang are able to check the format arguments given to a
-function and warn the user if there is a error in the format arguments
-or if there is a potential uncontrolled format string security problem
-in the code. GCC does this automatically for some functions like
-printf(), but it is also possible to annotate other functions in a way
-that it will check them too. This feature is used by glibc for many
-functions. This patch adds the attribute to the some functions of musl
-expect for these functions where gcc automatically adds it.
-
-GCC automatically adds checks for these functions: printf, fprintf,
-sprintf, scanf, fscanf, sscanf, strftime, vprintf, vfprintf and
-vsprintf.
-
-The documentation from gcc is here:
-https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
-
-The documentation from Clang is here:
-http://clang.llvm.org/docs/AttributeReference.html#format-gnu-format
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
----
- include/err.h      | 26 +++++++++++++++++---------
- include/monetary.h | 12 ++++++++++--
- include/stdio.h    | 29 ++++++++++++++++++++---------
- include/syslog.h   | 12 ++++++++++--
- 4 files changed, 57 insertions(+), 22 deletions(-)
-
---- a/include/err.h
-+++ b/include/err.h
-@@ -8,15 +8,23 @@
- extern "C" {
- #endif
- 
--void warn(const char *, ...);
--void vwarn(const char *, va_list);
--void warnx(const char *, ...);
--void vwarnx(const char *, va_list);
-+#if __GNUC__ >= 3
-+#define __fp(x, y) __attribute__ ((__format__ (__printf__, x, y)))
-+#else
-+#define __fp(x, y)
-+#endif
-+
-+void warn(const char *, ...) __fp(1, 2);
-+void vwarn(const char *, va_list) __fp(1, 0);
-+void warnx(const char *, ...) __fp(1, 2);
-+void vwarnx(const char *, va_list) __fp(1, 0);
-+
-+_Noreturn void err(int, const char *, ...) __fp(2, 3);
-+_Noreturn void verr(int, const char *, va_list) __fp(2, 0);
-+_Noreturn void errx(int, const char *, ...) __fp(2, 3);
-+_Noreturn void verrx(int, const char *, va_list) __fp(2, 0);
- 
--_Noreturn void err(int, const char *, ...);
--_Noreturn void verr(int, const char *, va_list);
--_Noreturn void errx(int, const char *, ...);
--_Noreturn void verrx(int, const char *, va_list);
-+#undef __fp
- 
- #ifdef __cplusplus
- }
---- a/include/monetary.h
-+++ b/include/monetary.h
-@@ -13,8 +13,16 @@ extern "C" {
- 
- #include <bits/alltypes.h>
- 
--ssize_t strfmon(char *__restrict, size_t, const char *__restrict, ...);
--ssize_t strfmon_l(char *__restrict, size_t, locale_t, const char *__restrict, ...);
-+#if __GNUC__ >= 3
-+#define __fsfm(x, y) __attribute__ ((__format__ (__strfmon__, x, y)))
-+#else
-+#define __fsfm(x, y)
-+#endif
-+
-+ssize_t strfmon(char *__restrict, size_t, const char *__restrict, ...) __fsfm(3, 4);
-+ssize_t strfmon_l(char *__restrict, size_t, locale_t, const char *__restrict, ...) __fsfm(4, 5);
-+
-+#undef __fsfm
- 
- #ifdef __cplusplus
- }
---- a/include/stdio.h
-+++ b/include/stdio.h
-@@ -25,6 +25,14 @@ extern "C" {
- 
- #include <bits/alltypes.h>
- 
-+#if __GNUC__ >= 3
-+#define __fp(x, y) __attribute__ ((__format__ (__printf__, x, y)))
-+#define __fs(x, y) __attribute__ ((__format__ (__scanf__, x, y)))
-+#else
-+#define __fp(x, y)
-+#define __fs(x, y)
-+#endif
-+
- #ifdef __cplusplus
- #define NULL 0L
- #else
-@@ -107,19 +115,19 @@ int puts(const char *);
- int printf(const char *__restrict, ...);
- int fprintf(FILE *__restrict, const char *__restrict, ...);
- int sprintf(char *__restrict, const char *__restrict, ...);
--int snprintf(char *__restrict, size_t, const char *__restrict, ...);
-+int snprintf(char *__restrict, size_t, const char *__restrict, ...) __fp(3, 4);
- 
- int vprintf(const char *__restrict, __isoc_va_list);
- int vfprintf(FILE *__restrict, const char *__restrict, __isoc_va_list);
- int vsprintf(char *__restrict, const char *__restrict, __isoc_va_list);
--int vsnprintf(char *__restrict, size_t, const char *__restrict, __isoc_va_list);
-+int vsnprintf(char *__restrict, size_t, const char *__restrict, __isoc_va_list) __fp(3, 0);
- 
- int scanf(const char *__restrict, ...);
- int fscanf(FILE *__restrict, const char *__restrict, ...);
- int sscanf(const char *__restrict, const char *__restrict, ...);
--int vscanf(const char *__restrict, __isoc_va_list);
--int vfscanf(FILE *__restrict, const char *__restrict, __isoc_va_list);
--int vsscanf(const char *__restrict, const char *__restrict, __isoc_va_list);
-+int vscanf(const char *__restrict, __isoc_va_list) __fs(1, 0);
-+int vfscanf(FILE *__restrict, const char *__restrict, __isoc_va_list) __fs(2, 0);
-+int vsscanf(const char *__restrict, const char *__restrict, __isoc_va_list) __fs(2, 0);
- 
- void perror(const char *);
- 
-@@ -140,8 +148,8 @@ int pclose(FILE *);
- int fileno(FILE *);
- int fseeko(FILE *, off_t, int);
- off_t ftello(FILE *);
--int dprintf(int, const char *__restrict, ...);
--int vdprintf(int, const char *__restrict, __isoc_va_list);
-+int dprintf(int, const char *__restrict, ...) __fp(2, 3);
-+int vdprintf(int, const char *__restrict, __isoc_va_list) __fp(2, 0);
- void flockfile(FILE *);
- int ftrylockfile(FILE *);
- void funlockfile(FILE *);
-@@ -180,8 +188,8 @@ int fileno_unlocked(FILE *);
- int getw(FILE *);
- int putw(int, FILE *);
- char *fgetln(FILE *, size_t *);
--int asprintf(char **, const char *, ...);
--int vasprintf(char **, const char *, __isoc_va_list);
-+int asprintf(char **, const char *, ...) __fp(2, 3);
-+int vasprintf(char **, const char *, __isoc_va_list) __fp(2, 0);
- #endif
- 
- #ifdef _GNU_SOURCE
-@@ -203,6 +211,9 @@ typedef struct _IO_cookie_io_functions_t
- FILE *fopencookie(void *, const char *, cookie_io_functions_t);
- #endif
- 
-+#undef __fp
-+#undef __fs
-+
- #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
- #define tmpfile64 tmpfile
- #define fopen64 fopen
---- a/include/syslog.h
-+++ b/include/syslog.h
-@@ -56,16 +56,22 @@ extern "C" {
- #define LOG_NOWAIT 0x10
- #define LOG_PERROR 0x20
- 
-+#if __GNUC__ >= 3
-+#define __fp(x, y) __attribute__ ((__format__ (__printf__, x, y)))
-+#else
-+#define __fp(x, y)
-+#endif
-+
- void closelog (void);
- void openlog (const char *, int, int);
- int setlogmask (int);
--void syslog (int, const char *, ...);
-+void syslog (int, const char *, ...) __fp(2, 3);
- 
- #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
- #define _PATH_LOG "/dev/log"
- #define __NEED_va_list
- #include <bits/alltypes.h>
--void vsyslog (int, const char *, va_list);
-+void vsyslog (int, const char *, va_list) __fp(2, 0);
- #if defined(SYSLOG_NAMES)
- #define	INTERNAL_NOPRI 0x10
- #define	INTERNAL_MARK (LOG_NFACILITIES<<3)
-@@ -93,6 +99,8 @@ typedef struct {
- #endif
- #endif
- 
-+#undef __fp
-+
- #ifdef __cplusplus
- }
- #endif