From ac978969f7474b0a1f9b19189a0dd4d3ed6a908f Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Fri, 12 Nov 2021 19:13:35 -0600
Subject: [PATCH] litex: Enable -Werror=missing-prototypes

---
 ports/litex/Makefile                               | 2 +-
 ports/litex/background.c                           | 1 +
 ports/litex/common-hal/microcontroller/Processor.c | 1 +
 ports/litex/common-hal/os/__init__.c               | 4 +++-
 ports/litex/mphalport.c                            | 2 ++
 ports/litex/supervisor/port.c                      | 1 +
 6 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ports/litex/Makefile b/ports/litex/Makefile
index e483832fc1..6fe9e46bec 100644
--- a/ports/litex/Makefile
+++ b/ports/litex/Makefile
@@ -88,7 +88,7 @@ endif
 # option to override compiler optimization level, set in boards/$(BOARD)/mpconfigboard.mk
 CFLAGS += $(OPTIMIZATION_FLAGS)
 
-CFLAGS += $(INC) -Werror -Wall -std=gnu11 -nostdlib -fshort-enums $(BASE_CFLAGS) $(C_DEFS) $(CFLAGS_MOD) $(COPT)
+CFLAGS += $(INC) -Werror -Wall -std=gnu11 -nostdlib -fshort-enums $(BASE_CFLAGS) $(C_DEFS) $(CFLAGS_MOD) $(COPT) -Werror=missing-prototypes
 
 # TODO: check this
 CFLAGS += -D__START=main -DFOMU
diff --git a/ports/litex/background.c b/ports/litex/background.c
index da86919c0c..d2e94c5b8d 100644
--- a/ports/litex/background.c
+++ b/ports/litex/background.c
@@ -28,6 +28,7 @@
 #include "supervisor/filesystem.h"
 #include "supervisor/usb.h"
 #include "supervisor/shared/stack.h"
+#include "supervisor/port.h"
 
 void port_background_task(void) {
 }
diff --git a/ports/litex/common-hal/microcontroller/Processor.c b/ports/litex/common-hal/microcontroller/Processor.c
index 4d4f88288e..ff2f041876 100644
--- a/ports/litex/common-hal/microcontroller/Processor.c
+++ b/ports/litex/common-hal/microcontroller/Processor.c
@@ -29,6 +29,7 @@
 #include "py/runtime.h"
 
 #include "common-hal/microcontroller/Processor.h"
+#include "shared-bindings/microcontroller/Processor.h"
 #include "shared-bindings/microcontroller/ResetReason.h"
 #include "supervisor/shared/translate.h"
 
diff --git a/ports/litex/common-hal/os/__init__.c b/ports/litex/common-hal/os/__init__.c
index c070c2777e..717c819335 100644
--- a/ports/litex/common-hal/os/__init__.c
+++ b/ports/litex/common-hal/os/__init__.c
@@ -30,6 +30,8 @@
 #include "py/objtuple.h"
 #include "py/qstr.h"
 
+#include "shared-bindings/os/__init__.h"
+
 STATIC const qstr os_uname_info_fields[] = {
     MP_QSTR_sysname, MP_QSTR_nodename,
     MP_QSTR_release, MP_QSTR_version, MP_QSTR_machine
@@ -56,6 +58,6 @@ mp_obj_t common_hal_os_uname(void) {
     return (mp_obj_t)&os_uname_info_obj;
 }
 
-bool common_hal_os_urandom(uint8_t *buffer, uint32_t length) {
+bool common_hal_os_urandom(uint8_t *buffer, mp_uint_t length) {
     return false;
 }
diff --git a/ports/litex/mphalport.c b/ports/litex/mphalport.c
index 5eedc73f3c..0747c12190 100644
--- a/ports/litex/mphalport.c
+++ b/ports/litex/mphalport.c
@@ -31,6 +31,7 @@
 #include "py/mphal.h"
 #include "py/mpstate.h"
 #include "py/gc.h"
+#include "supervisor/cpu.h"
 #include "supervisor/usb.h"
 
 #include "csr.h"
@@ -54,6 +55,7 @@ extern void SysTick_Handler(void);
 // be prematurely enabled by interrupt handlers that enable and disable interrupts.
 extern volatile uint32_t nesting_count;
 
+void isr(void);
 __attribute__((section(".ramtext")))
 void isr(void) {
     uint8_t irqs = irq_pending() & irq_getmask();
diff --git a/ports/litex/supervisor/port.c b/ports/litex/supervisor/port.c
index 6f108ee051..42d3a63920 100644
--- a/ports/litex/supervisor/port.c
+++ b/ports/litex/supervisor/port.c
@@ -38,6 +38,7 @@
 // crystals.
 volatile uint64_t raw_ticks = 0;
 volatile int subsecond = 0;
+void SysTick_Handler(void);
 __attribute__((section(".ramtext")))
 void SysTick_Handler(void) {
     timer0_ev_pending_write(1);