Use LLVM/clang toolchain

makefiles/common.mk

@@ -1,9 +1,8 @@
 CFLAGS := -g -m64 -mno-sse
 CFLAGS += -nostdlib -std=c++11
 CFLAGS += -O2 -Os -Wall -Wextra -Werror
-CFLAGS += -Wsuggest-attribute=format -Wsuggest-attribute=pure
-CFLAGS += -Wsuggest-attribute=const -Wsuggest-attribute=noreturn
-CFLAGS += -Wcast-qual -Wcast-align -Wuseless-cast -Winline
+CFLAGS += -Wproperty-attribute-mismatch
+CFLAGS += -Wcast-qual -Wcast-align -Winline
 CFLAGS += -ffreestanding -fno-exceptions -fno-rtti -fshort-wchar
 CFLAGS += -ffunction-sections -fdata-sections -fpic -fpie
 

makefiles/defs.mk

@@ -32,7 +32,7 @@ KERNOBJS += $(OLIBDIR)/$$(LIBNAME_$(1)).a
 $(OLIBDIR)/$$(LIBNAME_$(1)).a: $$(OBJS_$(1))
 	@ mkdir -p $$(dir $$@)
 	$(QECHO) AR $$(subst $(OLIBDIR)/,,$$@)
-	$(Q) $(AR) -cru $$@ $$?
+	$(Q) $(AR) cru $$@ $$?
 endef
 
 define LIBRULES

makefiles/rules.mk

@@ -36,7 +36,7 @@ $(OOBJDIR)/%.o: $(SRCDIR)/%.s
 $(BIN).elf: $(KERNOBJS) $(OOBJDIR)/modules-linked.o
 	@ mkdir -p $(dir $@)
 	$(QECHO) LD $(subst $(OIMGDIR)/,,$@)
-	$(Q) $(LD) $(LDFLAGS) -Tld/system.ld -o $@ -Wl,--start-group $^ -Wl,--end-group
+	$(Q) $(LD) $(LDFLAGS) -Tld/system.ld -o $@ $^
 
 $(BIN).elf.strip: $(BIN).elf
 	$(Q) $(STRIP) -o $@ $^

makefiles/toolchain.mk

@@ -1,12 +1,15 @@
 PREFIX=x86_64-linux-gnu-
 NPROC=1
+CLANG_BIN=$(dir $(shell which clang-5.0))
+CLANG_BIN ?= /usr/bin
 
 ifeq ($(OS),Windows_NT)
   PREFIX=x86_64-w64-mingw32-
 else
   UNAME_S=$(shell uname -s)
   ifeq ($(UNAME_S),Darwin)
     PREFIX=x86_64-elf-
+    CLANG_BIN=/usr/local/opt/llvm/bin
 	  NPROC=$(shell sysctl -n hw.ncpu)
   else
 	  NPROC=$(shell grep -c ^processor /proc/cpuinfo)
@@ -25,9 +28,9 @@ else
   QECHO=@ echo
 endif
 
-CC=$(PREFIX)g++
-LD=$(PREFIX)g++
-AR=$(PREFIX)ar
+CC=$(CLANG_BIN)/clang-5.0 --target=x86_64-none-elf
+LD=$(firstword $(wildcard $(CLANG_BIN)/ld.lld-5.0 $(CLANG_BIN)/ld.lld))
+AR=$(firstword $(wildcard $(CLANG_BIN)/llvm-ar-5.0 $(CLANG_BIN)/llvm-ar))
 OBJCOPY=$(PREFIX)objcopy
 STRIP=$(PREFIX)strip