feat: add support for aarch64 timer/interrupts, port MontaukOS userspace

programs/src/keyboard/Makefile

@@ -3,29 +3,29 @@
 MAKEFLAGS += -rR
 .SUFFIXES:
 
-TOOLCHAIN_PREFIX := $(shell cd ../../.. && pwd)/toolchain/local/bin/x86_64-montauk-
+include ../../mk/arch.mk
 ifeq ($(wildcard $(TOOLCHAIN_PREFIX)gcc),)
-    CXX = $(error x86_64-montauk toolchain not found. Run ./toolchain/build-montauk-toolchain.sh first)
+    CXX = $(error $(TOOLCHAIN_MISSING))
 else
     CXX := $(TOOLCHAIN_PREFIX)g++
 endif
 
 PROG_INC := ../../include
 LINK_LD  := ../../link.ld
-BINDIR   := ../../bin
-OBJDIR   := obj
+BINDIR   := ../../bin$(ARCH_SUFFIX)
+OBJDIR   := obj$(ARCH_SUFFIX)
 LIBDIR   := ../../lib
 
 CXXFLAGS := -std=gnu++20 -g -O2 -pipe -Wall -Wextra -Wno-unused-parameter \
     -Wno-unused-function -ffreestanding -fno-stack-protector -fno-stack-check \
-    -fno-rtti -fno-exceptions -ffunction-sections -fdata-sections -msse -msse2 \
+    -fno-rtti -fno-exceptions -ffunction-sections -fdata-sections $(ARCH_FP_FLAGS) \
     -MMD -MP -I $(PROG_INC) -isystem $(PROG_INC)/libc
 LDFLAGS := -nostdlib -Wl,--gc-sections -T $(LINK_LD)
 
 SRCS := main.cpp stb_truetype_impl.cpp
 OBJS := $(addprefix $(OBJDIR)/,$(SRCS:.cpp=.o))
 TARGET := $(BINDIR)/apps/keyboard/keyboard.elf
-LIBS := $(LIBDIR)/libc/liblibc.a
+LIBS := $(LIBDIR)/libc/$(ARCH_OUT)liblibc.a
 
 .PHONY: all clean
 all: $(TARGET)