diff --git a/kconfigs/Kconfig.features b/kconfigs/Kconfig.features
index 7614d72a85..f7b8a7b0ce 100644
--- a/kconfigs/Kconfig.features
+++ b/kconfigs/Kconfig.features
@@ -22,6 +22,11 @@ config HAS_ARCH_32BIT
     help
         Indicates that the CPU has a 32-bits architecture.
 
+config HAS_ARCH_64BIT
+    bool
+    help
+        Indicates that the CPU has a 64-bits architecture.
+
 config HAS_ARCH_ARM
     bool
     help
diff --git a/pkg/cifra/Kconfig b/pkg/cifra/Kconfig
index 7f1b4400de..279f3ec5f2 100644
--- a/pkg/cifra/Kconfig
+++ b/pkg/cifra/Kconfig
@@ -8,7 +8,7 @@
 config PACKAGE_CIFRA
     bool "Cifra cryptographic primitives"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     help
         Cifra is a collection of cryptographic primitives targeted at
         embedded use.
diff --git a/pkg/cifra/Makefile.dep b/pkg/cifra/Makefile.dep
index 57d8d54026..bbb39611d8 100644
--- a/pkg/cifra/Makefile.dep
+++ b/pkg/cifra/Makefile.dep
@@ -1,2 +1,2 @@
 # Cifra is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/cn-cbor/Kconfig b/pkg/cn-cbor/Kconfig
index 89d0c8af9b..1c6a3ecc8b 100644
--- a/pkg/cn-cbor/Kconfig
+++ b/pkg/cn-cbor/Kconfig
@@ -8,7 +8,7 @@
 config PACKAGE_CN-CBOR
     bool "Constrained Node CBOR"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     select MODULE_POSIX_HEADERS
     help
         A constrained node implementation of CBOR in C.
diff --git a/pkg/cn-cbor/Makefile.dep b/pkg/cn-cbor/Makefile.dep
index d2baa35dfe..ff9e6dbea5 100644
--- a/pkg/cn-cbor/Makefile.dep
+++ b/pkg/cn-cbor/Makefile.dep
@@ -1,4 +1,4 @@
 USEMODULE += posix_headers
 
 # CN-CBOR is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/flashdb/Makefile.dep b/pkg/flashdb/Makefile.dep
index 98f771e1a2..e85e9b7ac8 100644
--- a/pkg/flashdb/Makefile.dep
+++ b/pkg/flashdb/Makefile.dep
@@ -1,5 +1,5 @@
 # FlashDB is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
 CFLAGS += -DFDB_USING_NATIVE_ASSERT
 
 ifneq (,$(filter flashdb_tsdb,$(USEMODULE)))
diff --git a/pkg/hacl/Kconfig b/pkg/hacl/Kconfig
index 162edb9b8c..e15e9e0e5d 100644
--- a/pkg/hacl/Kconfig
+++ b/pkg/hacl/Kconfig
@@ -9,4 +9,4 @@ config PACKAGE_HACL
     bool "High Assurance Cryptographic Library package"
     depends on TEST_KCONFIG
     depends on MODULE_RANDOM
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
diff --git a/pkg/hacl/Makefile.dep b/pkg/hacl/Makefile.dep
index f9aabaca2e..4d3de698e3 100644
--- a/pkg/hacl/Makefile.dep
+++ b/pkg/hacl/Makefile.dep
@@ -1,4 +1,4 @@
 USEMODULE+=random
 
 # HACL is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/hacl/patches/0003-64-bit-fix.patch b/pkg/hacl/patches/0003-64-bit-fix.patch
new file mode 100644
index 0000000000..64be9a564c
Binary files /dev/null and b/pkg/hacl/patches/0003-64-bit-fix.patch differ
diff --git a/pkg/jerryscript/Kconfig b/pkg/jerryscript/Kconfig
index c753a5882a..9de6349ba5 100644
--- a/pkg/jerryscript/Kconfig
+++ b/pkg/jerryscript/Kconfig
@@ -8,7 +8,7 @@
 config PACKAGE_JERRYSCRIPT
     bool "Ultra-lightweight Javascript interpreter"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
 
     select MODULE_JERRYSCRIPT-PORT-DEFAULT
     select MODULE_JERRYSCRIPT-EXT
diff --git a/pkg/jerryscript/Makefile.dep b/pkg/jerryscript/Makefile.dep
index 6a37b67a1b..5c9e843483 100644
--- a/pkg/jerryscript/Makefile.dep
+++ b/pkg/jerryscript/Makefile.dep
@@ -2,4 +2,4 @@ USEMODULE += jerryscript-port-default
 USEMODULE += jerryscript-ext
 
 # Jerryscript is only supported by 32-bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/libhydrogen/Kconfig b/pkg/libhydrogen/Kconfig
index 5bace30062..a539125cda 100644
--- a/pkg/libhydrogen/Kconfig
+++ b/pkg/libhydrogen/Kconfig
@@ -9,4 +9,4 @@ config PACKAGE_LIBHYDROGEN
     bool "LibHydrogen Crypto Library package"
     depends on TEST_KCONFIG
     depends on MODULE_RANDOM
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
diff --git a/pkg/libhydrogen/Makefile.dep b/pkg/libhydrogen/Makefile.dep
index caba98824e..ba806eab6b 100644
--- a/pkg/libhydrogen/Makefile.dep
+++ b/pkg/libhydrogen/Makefile.dep
@@ -3,4 +3,4 @@ USEMODULE += random
 # libhydrogen is only supported by 32 bit architectures
 # AVR boards: require avr-gcc >= 7.0 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60040)
 # MSP430 boards: invalid alignment of 'hydro_random_context'
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/lorabasics/Makefile.dep b/pkg/lorabasics/Makefile.dep
index 08222d5ccd..afc70f28db 100644
--- a/pkg/lorabasics/Makefile.dep
+++ b/pkg/lorabasics/Makefile.dep
@@ -7,5 +7,5 @@ ifneq (,$(filter lorabasics_sx1280_driver,$(USEMODULE)))
   USEMODULE += lorabasics_driver_sx1280_hal
 endif
 # This package has assumptions that only work for 32-bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
 USEMODULE += lorabasics_smtc_ral
diff --git a/pkg/lua/Kconfig b/pkg/lua/Kconfig
index 66422b3f26..925c5a62ab 100644
--- a/pkg/lua/Kconfig
+++ b/pkg/lua/Kconfig
@@ -8,7 +8,7 @@
 config PACKAGE_LUA
     bool "LUA language package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     depends on !HAS_ARCH_RISCV
     depends on !MODULE_PICOLIBC
 
diff --git a/pkg/lua/Makefile.dep b/pkg/lua/Makefile.dep
index d2cab70e55..62104e0b47 100644
--- a/pkg/lua/Makefile.dep
+++ b/pkg/lua/Makefile.dep
@@ -3,7 +3,7 @@ USEMODULE += lua-contrib
 USEMODULE += printf_float
 
 # LUA is only supported by 32-bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
 
 # LUA is not supported on RISCV because of build issues with the toolchain
 # (undefined reference to _times, _unlink and _link functions in provided
diff --git a/pkg/lwip/Makefile.dep b/pkg/lwip/Makefile.dep
index 29a1089e9e..5be5109d8b 100644
--- a/pkg/lwip/Makefile.dep
+++ b/pkg/lwip/Makefile.dep
@@ -1,6 +1,6 @@
 # lwIP's memory management doesn't seem to work on non 32-bit platforms at the
 # moment.
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
 
 DEFAULT_MODULE += auto_init_lwip
 
diff --git a/pkg/lwip/Makefile.include b/pkg/lwip/Makefile.include
index c2fac0ad53..f5292f97a6 100644
--- a/pkg/lwip/Makefile.include
+++ b/pkg/lwip/Makefile.include
@@ -17,6 +17,11 @@ PSEUDOMODULES += lwip_udp
 PSEUDOMODULES += lwip_udplite
 PSEUDOMODULES += lwip_sock_async
 
+ifneq (,$(filter arch_64bit,$(FEATURES_USED)))
+# Required for platforms where sizeof(void*) > 4
+    CFLAGS += -DIPV6_FRAG_COPYHEADER=1
+endif
+
 ifneq (,$(filter lwip_contrib,$(USEMODULE)))
   DIRS += $(RIOTBASE)/pkg/lwip/contrib
 endif
diff --git a/pkg/lwip/contrib/sock/lwip_sock.c b/pkg/lwip/contrib/sock/lwip_sock.c
index e13d7126c6..6a52f74c01 100644
--- a/pkg/lwip/contrib/sock/lwip_sock.c
+++ b/pkg/lwip/contrib/sock/lwip_sock.c
@@ -616,7 +616,7 @@ ssize_t lwip_sock_sendv(struct netconn *conn, const iolist_t *snips,
     struct netconn *tmp;
     struct netbuf *buf = NULL;
     size_t payload_len = 0;
-    int res;
+    ssize_t res;
     err_t err= ERR_OK;
     u16_t remote_port = 0;
 
diff --git a/pkg/micro-ecc/patches/0001-int128-fix-for-GCC.patch b/pkg/micro-ecc/patches/0001-int128-fix-for-GCC.patch
new file mode 100644
index 0000000000..7a220b4748
Binary files /dev/null and b/pkg/micro-ecc/patches/0001-int128-fix-for-GCC.patch differ
diff --git a/pkg/monocypher/Kconfig b/pkg/monocypher/Kconfig
index 689fbe732f..ea4992eaa4 100644
--- a/pkg/monocypher/Kconfig
+++ b/pkg/monocypher/Kconfig
@@ -8,7 +8,7 @@
 config PACKAGE_MONOCYPHER
     bool "Monocypher high performance cryptographic library package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     select MODULE_MONOCYPHER_OPTIONAL
     help
         Provides functions for authenticated encryption, hashing,
diff --git a/pkg/monocypher/Makefile.dep b/pkg/monocypher/Makefile.dep
index 21096b0b43..be8438f947 100644
--- a/pkg/monocypher/Makefile.dep
+++ b/pkg/monocypher/Makefile.dep
@@ -2,4 +2,4 @@
 USEMODULE += monocypher_optional
 
 # monocypher is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/qcbor/Kconfig b/pkg/qcbor/Kconfig
index 016dbb9264..6ed49ee5cd 100644
--- a/pkg/qcbor/Kconfig
+++ b/pkg/qcbor/Kconfig
@@ -8,4 +8,4 @@
 config PACKAGE_QCBOR
     bool "QCBOR CBOR encoder/decoder"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
diff --git a/pkg/qcbor/Makefile.dep b/pkg/qcbor/Makefile.dep
index bdbbad5895..ddb8a6ad1d 100644
--- a/pkg/qcbor/Makefile.dep
+++ b/pkg/qcbor/Makefile.dep
@@ -1 +1 @@
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/tinycbor/Kconfig b/pkg/tinycbor/Kconfig
index b63d52e830..5b2778b300 100644
--- a/pkg/tinycbor/Kconfig
+++ b/pkg/tinycbor/Kconfig
@@ -8,7 +8,7 @@
 menuconfig PACKAGE_TINYCBOR
     bool "Tiny CBOR encode/decoder package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     help
         TinyCBOR is a CBOR encoder and decoder with a very small
         footprint, optimized for very fast operation.
diff --git a/pkg/tinycbor/Makefile.dep b/pkg/tinycbor/Makefile.dep
index 10f81a15ca..b33f081360 100644
--- a/pkg/tinycbor/Makefile.dep
+++ b/pkg/tinycbor/Makefile.dep
@@ -1,2 +1,2 @@
 # tinycbor is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/tinycrypt/Kconfig b/pkg/tinycrypt/Kconfig
index afbaf3c560..e0e7a90c12 100644
--- a/pkg/tinycrypt/Kconfig
+++ b/pkg/tinycrypt/Kconfig
@@ -8,4 +8,4 @@
 config PACKAGE_TINYCRYPT
     bool "TinyCrypt crypto library package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
diff --git a/pkg/tinycrypt/Makefile.dep b/pkg/tinycrypt/Makefile.dep
index bdbbad5895..ddb8a6ad1d 100644
--- a/pkg/tinycrypt/Makefile.dep
+++ b/pkg/tinycrypt/Makefile.dep
@@ -1 +1 @@
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/tinyusb/Kconfig b/pkg/tinyusb/Kconfig
index 22bf0bf29a..1d35b34855 100644
--- a/pkg/tinyusb/Kconfig
+++ b/pkg/tinyusb/Kconfig
@@ -32,7 +32,7 @@ choice USB_IMPLEMENTATION
 menuconfig PACKAGE_TINYUSB
     bool "TinyUSB stack package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     depends on HAS_TINYUSB_DEVICE || HAS_TINYUSB_HOST
     select MODULE_FMT
     select MODULE_LUID
diff --git a/pkg/tlsf/Kconfig b/pkg/tlsf/Kconfig
index 56392395c2..f6b34d41b2 100644
--- a/pkg/tlsf/Kconfig
+++ b/pkg/tlsf/Kconfig
@@ -8,7 +8,7 @@
 menuconfig PACKAGE_TLSF
     bool "TLFS malloc/realloc/free/etc package"
     depends on TEST_KCONFIG
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
     help
         TLSF provides an implementation of malloc/realloc/free/etc.
 
diff --git a/pkg/tlsf/Makefile.dep b/pkg/tlsf/Makefile.dep
index 3ca354f82c..448c5d76a5 100644
--- a/pkg/tlsf/Makefile.dep
+++ b/pkg/tlsf/Makefile.dep
@@ -9,4 +9,4 @@ ifneq (,$(filter tlsf-malloc,$(USEMODULE)))
 endif
 
 # tlsf is not compatible with 8bit and 16bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/uwb-dw1000/Kconfig b/pkg/uwb-dw1000/Kconfig
index 539e7d9a18..fa3cc8f2af 100644
--- a/pkg/uwb-dw1000/Kconfig
+++ b/pkg/uwb-dw1000/Kconfig
@@ -14,7 +14,7 @@ menuconfig PACKAGE_UWB-DW1000
     select MODULE_PERIPH_GPIO_IRQ
     depends on HAS_PERIPH_SPI
     select MODULE_PERIPH_SPI
-    depends on HAS_ARCH_32BIT
+    depends on HAS_ARCH_32BIT || HAS_ARCH_64BIT
 
 if PACKAGE_UWB-DW1000
 
diff --git a/pkg/uwb-dw1000/Makefile.dep b/pkg/uwb-dw1000/Makefile.dep
index 2f7e3f9ec4..5ea65c36dc 100644
--- a/pkg/uwb-dw1000/Makefile.dep
+++ b/pkg/uwb-dw1000/Makefile.dep
@@ -7,4 +7,4 @@ FEATURES_REQUIRED += periph_gpio_irq
 FEATURES_REQUIRED += periph_spi
 
 # Some of the pkg operation would overflow on 16bit
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/wolfssl/Makefile.dep b/pkg/wolfssl/Makefile.dep
index f4262b0242..9aff99de46 100644
--- a/pkg/wolfssl/Makefile.dep
+++ b/pkg/wolfssl/Makefile.dep
@@ -91,4 +91,4 @@ ifneq (,$(filter native,$(CPU)))
 endif
 
 # wolfssl is only supported by 32 bit architectures
-FEATURES_REQUIRED += arch_32bit
+FEATURES_REQUIRED_ANY += arch_32bit|arch_64bit
diff --git a/pkg/wolfssl/include/user_settings.h b/pkg/wolfssl/include/user_settings.h
index 79f58f2aca..b2602ce829 100644
--- a/pkg/wolfssl/include/user_settings.h
+++ b/pkg/wolfssl/include/user_settings.h
@@ -73,7 +73,7 @@ extern "C" {
 #endif
 
 /* defined somewhere else */
-int strncasecmp(const char *s1, const char * s2, unsigned int sz);
+int strncasecmp(const char *s1, const char * s2, size_t sz);
 
 #define SINGLE_THREADED
 
diff --git a/pkg/wolfssl/sock_tls/sock_tls.c b/pkg/wolfssl/sock_tls/sock_tls.c
index 37bcbaf754..3e170cccfb 100644
--- a/pkg/wolfssl/sock_tls/sock_tls.c
+++ b/pkg/wolfssl/sock_tls/sock_tls.c
@@ -85,7 +85,7 @@ void sock_dtls_session_destroy(sock_tls_t *sk)
 #endif
 
 #include <ctype.h>
-int strncasecmp(const char *s1, const char * s2, unsigned int sz)
+int strncasecmp(const char *s1, const char * s2, size_t sz)
 {
     unsigned int i;
     for( i = 0; i < sz; i++) {