[rp20xx][pico-sdk] add some missing / generated headers

- sys/cdefs is wanted for __CONCAT()
- version.h and config_autogen.h are generated by the pico sdk
- config_autogen expects to include board file
- instead define PICO_xyz in target rules.mk

platform/rp20xx/include/pico/config_autogen.h

@@ -0,0 +1,4 @@
+
+// pico sdk expects this to include boards/xyz.h and define PICO_*
+
+// we instead define those via GLOBAL defines in target/pico/rules.mk

platform/rp20xx/include/pico/version.h

@@ -0,0 +1,10 @@
+
+#ifndef _PICO_VERSION_H
+#define _PICO_VERSION_H
+
+#define PICO_SDK_VERSION_MAJOR    1
+#define PICO_SDK_VERSION_MINOR    0
+#define PICO_SDK_VERSION_REVISION 1
+#define PICO_SDK_VERSION_STRING   "1.0.1"
+
+#endif

platform/rp20xx/include/sys/cdefs.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#ifndef __CONCAT
+#define __CONCAT1(x,y) x ## y
+#define __CONCAT(x,y) __CONCAT1(x,y)
+#endif

platform/rp20xx/rules.mk

@@ -12,7 +12,8 @@ ARCH := arm
 ARM_CPU := cortex-m0plus
 
 GLOBAL_DEFINES += \
-	MEMSIZE=$(MEMSIZE)
+	MEMSIZE=$(MEMSIZE) \
+	PICO_NO_BINARY_INFO=1
 
 MODULE_SRCS += \
 	$(LOCAL_DIR)/debug.c \

target/pico/rules.mk

@@ -5,7 +5,11 @@ MODULE := $(LOCAL_DIR)
 PLATFORM := rp20xx
 
 GLOBAL_DEFINES += \
-	TARGET_HAS_DEBUG_LED=1
+	TARGET_HAS_DEBUG_LED=1 \
+	PICO_FLASH_SPI_CLKDIV=2 \
+	PICO_FLASH_SIZE_BYTES=0x200000 \
+	PICO_FLOAT_SUPPORT_ROM_V1=1 \
+	PICO_DOUBLE_SUPPORT_ROM_V1=1
 
 MODULE_SRCS += \
 	$(LOCAL_DIR)/boot.stage2.S \