native64: Add Linux/x86_64 board

Adds a separate board for native64 instead of the `NATIVE_64BIT` workaround.
The files in `boards/native64` are more or less dummy files and just include
the `boards/native` logic (similar to `openlabs-kw41z-mini-256kib`).
The main logic for native is in `makefiles/arch/native.inc.mk`, `cpu/native`
and `boards/native`.

The remaining changes concern the build system, and change native board checks
to native CPU checks to cover both boards.

Author: fzi-haxel

Makefile.include

@@ -204,7 +204,7 @@ include $(RIOTMAKE)/boards.inc.mk
 include $(RIOTMAKE)/dependencies_debug.inc.mk
 
 # Use TOOLCHAIN environment variable to select the toolchain to use.
-ifeq ($(BOARD),native)
+ifneq (,$(filter native native64,$(BOARD)))
   ifeq ($(OS),Darwin)
     $(shell $(COLOR_ECHO) "$(COLOR_RED)"Buildin on macOS is not supported."\
                           "We recommend vagrant for building:$(COLOR_RESET)"\

boards/native/Makefile.features

@@ -1,14 +1,6 @@
 CPU = native
 
-# Put defined MCU peripherals here (in alphabetical order)
-FEATURES_PROVIDED += periph_rtc
-FEATURES_PROVIDED += periph_rtc_ms
-FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
-FEATURES_PROVIDED += periph_gpio
-FEATURES_PROVIDED += periph_pwm
-FEATURES_PROVIDED += periph_qdec
+FEATURES_PROVIDED += arch_32bit
+NATIVE_ARCH_BIT = 32
 
-# Various other features (if any)
-FEATURES_PROVIDED += ethernet
-FEATURES_PROVIDED += motor_driver
+include $(RIOTBOARD)/native/common_features.inc.mk

boards/native/Makefile.include

@@ -1,17 +1,4 @@
-NATIVEINCLUDES += -DNATIVE_INCLUDES
 NATIVEINCLUDES += -I$(RIOTBOARD)/native/include/
-NATIVEINCLUDES += -I$(RIOTBASE)/core/lib/include/
-NATIVEINCLUDES += -I$(RIOTBASE)/core/include/
-NATIVEINCLUDES += -I$(RIOTBASE)/drivers/include/
-
-# Set "NATIVE_64BIT=1" to compile for x86_64
-NATIVE_64BIT ?= 0
-
-ifeq ($(OS),Darwin)
-  DEBUGGER ?= lldb
-else
-  DEBUGGER ?= gdb
-endif
 
 # only use pyterm wrapper if term target is requested
 ifeq (,$(filter term,$(MAKECMDGOALS)))
@@ -48,93 +35,6 @@ else
 endif
 endif
 
-export VALGRIND ?= valgrind
-export CGANNOTATE ?= cg_annotate
-export GPROF ?= gprof
-
-# basic cflags:
-CFLAGS += -Wall -Wextra -pedantic $(CFLAGS_DBG) $(CFLAGS_OPT)
-CFLAGS += -U_FORTIFY_SOURCE
-CFLAGS_DBG ?= -g3
-
-ifneq (,$(filter backtrace,$(USEMODULE)))
-  $(warning module backtrace is used, do not omit frame pointers)
-  CFLAGS_OPT ?= -Og -fno-omit-frame-pointer
-else
-  CFLAGS_OPT ?= -Og
-endif
-
-# default std set to gnu11 if not overwritten by user
-ifeq (,$(filter -std=%, $(CFLAGS)))
-  CFLAGS += -std=gnu11
-endif
-
-ifeq ($(OS_ARCH),x86_64)
-  ifeq ($(NATIVE_64BIT), 1)
-    CFLAGS += -m64
-  else
-    CFLAGS += -m32
-  endif
-endif
-ifneq (,$(filter -DDEVELHELP,$(CFLAGS)))
-  CFLAGS += -fstack-protector-all
-endif
-ifeq ($(OS),FreeBSD)
-  ifeq ($(OS_ARCH),amd64)
-    ifeq ($(NATIVE_64BIT), 1)
-      CFLAGS += -m64
-    else
-      CFLAGS += -m32 -DCOMPAT_32BIT -B/usr/lib32
-    endif
-  endif
-endif
-ifeq ($(OS),Darwin)
-  CFLAGS += -Wno-deprecated-declarations
-endif
-
-# unwanted (CXXUWFLAGS) and extra (CXXEXFLAGS) flags for c++
-CXXUWFLAGS +=
-CXXEXFLAGS +=
-
-ifeq ($(OS_ARCH),x86_64)
-  ifeq ($(NATIVE_64BIT), 1)
-    LINKFLAGS += -m64
-  else
-    LINKFLAGS += -m32
-  endif
-endif
-ifeq ($(OS),FreeBSD)
-  ifeq ($(OS_ARCH),amd64)
-    ifeq ($(NATIVE_64BIT), 1)
-      LINKFLAGS += -m64
-    else
-      LINKFLAGS += -m32 -DCOMPAT_32BIT -L/usr/lib32 -B/usr/lib32
-    endif
-  endif
-  LINKFLAGS += -L $(BINDIR)
-else
-  LINKFLAGS += -ldl
-endif
-
-# XFA (cross file array) support
-LINKFLAGS += -T$(RIOTBASE)/cpu/native/ldscripts/xfa.ld
-
-# fix this warning:
-# ```
-# /usr/bin/ld: examples/hello-world/bin/native/cpu/tramp.o: warning: relocation against `_native_saved_eip' in read-only section `.text'
-# /usr/bin/ld: warning: creating DT_TEXTREL in a PIE
-# ```
-LINKFLAGS += -no-pie
-
-# clean up unused functions
-CFLAGS += -ffunction-sections -fdata-sections
-ifeq ($(OS),Darwin)
-  LINKFLAGS += -Wl,-dead_strip
-else
-  LINKFLAGS += -Wl,--gc-sections
-endif
-LINKFLAGS += -ffunction-sections
-
 # set the tap interface for term/valgrind
 PORT ?= tap0
 TERMFLAGS += $(PROCARGS) $(PORT)
@@ -160,80 +60,3 @@ ifneq (,$(filter periph_can,$(FEATURES_USED)))
   PERIPH_CAN_FLAGS ?= --can $(VCAN_IFACE)
   TERMFLAGS += $(PERIPH_CAN_FLAGS)
 endif
-
-
-ASFLAGS =
-ifeq ($(shell basename $(DEBUGGER)),lldb)
-  DEBUGGER_FLAGS = -- $(ELFFILE) $(TERMFLAGS)
-else
-  DEBUGGER_FLAGS = -q --args $(ELFFILE) $(TERMFLAGS)
-endif
-term-valgrind: export VALGRIND_FLAGS ?= \
-	--leak-check=full \
-	--track-origins=yes \
-	--fullpath-after=$(RIOTBASE)/ \
-	--read-var-info=yes
-debug-valgrind-server: export VALGRIND_FLAGS ?= --vgdb=yes --vgdb-error=0 -v \
-	--leak-check=full --track-origins=yes --fullpath-after=$(RIOTBASE) \
-	--read-var-info=yes
-term-cachegrind: export CACHEGRIND_FLAGS += --tool=cachegrind
-term-gprof: TERMPROG = GMON_OUT_PREFIX=gmon.out $(ELFFILE)
-all-valgrind: CFLAGS += -DHAVE_VALGRIND_H
-all-valgrind: NATIVEINCLUDES += $(shell pkg-config valgrind --cflags)
-all-gprof: CFLAGS += -pg
-all-gprof: LINKFLAGS += -pg
-
-CFLAGS_ASAN += -fsanitize=address -fno-omit-frame-pointer -DNATIVE_MEMORY
-LINKFLAGS_ASAN += -fsanitize=address -fno-omit-frame-pointer
-all-asan: CFLAGS += $(CFLAGS_ASAN)
-all-asan: LINKFLAGS += $(LINKFLAGS_ASAN)
-all-asan: export AFL_USE_ASAN=1
-
-INCLUDES += $(NATIVEINCLUDES)
-
-CFLAGS += -DDEBUG_ASSERT_VERBOSE
-
-# workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
-ifneq ($(shell gcc --version | head -1 | grep -E ' (4.6|4.7)'),)
-  CFLAGS += -DHAVE_NO_BUILTIN_BSWAP16
-endif
-
-# clumsy way to enable building native on osx:
-BUILDOSXNATIVE = 0
-ifeq ($(CPU),native)
-  ifeq ($(OS),Darwin)
-    BUILDOSXNATIVE = 1
-  endif
-endif
-
-all: # do not override first target
-
-all-gprof: all
-
-all-asan: all
-
-all-valgrind: all
-
-all-cachegrind: all
-
-term-valgrind:
-	$(VALGRIND) $(VALGRIND_FLAGS) $(ELFFILE) $(PORT)
-
-debug-valgrind-server:
-	$(VALGRIND) $(VALGRIND_FLAGS) $(ELFFILE) $(PORT)
-
-debug-valgrind:
-	$(eval VALGRIND_PID ?= $(shell pgrep -n memcheck-x86-li -u $(USER) | cut -d" " -f1))
-	$(eval DEBUGGER_FLAGS := -ex "target remote | vgdb --pid=$(VALGRIND_PID)" $(DEBUGGER_FLAGS))
-	$(DEBUGGER) $(DEBUGGER_FLAGS)
-
-term-cachegrind:
-	$(VALGRIND) $(CACHEGRIND_FLAGS) $(ELFFILE) $(PORT)
-
-term-gprof: term
-
-eval-gprof:
-	$(GPROF) $(ELFFILE) $(shell ls -rt gmon.out* | tail -1)
-
-eval-cachegrind:
-	$(CGANNOTATE) $(shell ls -rt cachegrind.out* | tail -1)

boards/native/common_features.inc.mk

@@ -0,0 +1,12 @@
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_rtc
+FEATURES_PROVIDED += periph_rtc_ms
+FEATURES_PROVIDED += periph_timer
+FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_gpio
+FEATURES_PROVIDED += periph_pwm
+FEATURES_PROVIDED += periph_qdec
+
+# Various other features (if any)
+FEATURES_PROVIDED += ethernet
+FEATURES_PROVIDED += motor_driver

boards/native/doc.txt

@@ -25,8 +25,6 @@
 
 # Required packages
 
-The `native` version of RIOT will produce a 32 bit binary by default.
-To compile for x86_64 set the environment variable `NATIVE_64BIT=1`.
 On Debian/Ubuntu you can install the required libraries with
 
 ```

boards/native64/Kconfig

@@ -0,0 +1,30 @@
+# Copyright (c) 2020 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
+config BOARD
+    default "native64" if BOARD_NATIVE64
+
+config BOARD_NATIVE64
+    bool
+    default y
+    select CPU_MODEL_NATIVE
+
+    # Put defined MCU peripherals here (in alphabetical order)
+    select HAS_PERIPH_RTC
+    select HAS_PERIPH_RTC_MS
+    select HAS_PERIPH_TIMER
+    select HAS_PERIPH_UART
+    select HAS_PERIPH_GPIO
+    select HAS_PERIPH_PWM
+    select HAS_PERIPH_QDEC
+
+    # Various other features (if any)
+    select HAS_ETHERNET
+    select HAS_MOTOR_DRIVER
+    select HAVE_SDL
+
+rsource "../native/drivers/Kconfig"

boards/native64/Makefile

@@ -0,0 +1,3 @@
+DIRS = $(RIOTBOARD)/native
+
+include $(RIOTBASE)/Makefile.base

boards/native64/Makefile.dep

@@ -0,0 +1 @@
+include $(RIOTBOARD)/native/Makefile.dep

boards/native64/Makefile.features

@@ -0,0 +1,6 @@
+CPU = native
+
+FEATURES_PROVIDED += arch_64bit
+NATIVE_ARCH_BIT = 64
+
+include $(RIOTBOARD)/native/common_features.inc.mk

boards/native64/Makefile.include

@@ -0,0 +1 @@
+include $(RIOTBOARD)/native/Makefile.include