try to build lua-loader

Makefile.clang

@@ -11,9 +11,18 @@ OBJCOPY := llvm-objcopy${LLVM_SURFFIX}
 AR := llvm-ar${LLVM_SURFFIX}
 RANLIB := llvm-ranlib${LLVM_SURFFIX}
 
-CFLAGS := -fPIC -O3 -fno-builtin -nostdinc -nostdlib -nostartfiles -fvisibility=hidden -fdata-sections -ffunction-sections -I lualib -I include/ckb-c-stdlib -I include/ckb-c-stdlib/libc -I include/ckb-c-stdlib/molecule -Wall -Werror -Wno-nonnull -Wno-nonnull-compare -Wno-unused-function -g
+CFLAGS := --target=riscv64 -march=rv64imc_zba_zbb_zbc_zbs
+CFLAGS += -D__ISO_C_VISIBLE=1999 -DCKB_DECLARATION_ONLY -fPIC -g -O3
+CFLAGS += -fno-builtin-printf -fno-builtin-memcmp \
+		-nostdinc -nostdlib\
+		-fdata-sections -ffunction-sections
 
-LDFLAGS := -nostdlib -nostartfiles -fno-builtin -Wl,-static -fdata-sections -ffunction-sections -Wl,--gc-sections
+CFLAGS += -I lualib -I lualib/c-stdlib -I include/ckb-c-stdlib -I include/ckb-c-stdlib/libc -I include/ckb-c-stdlib/molecule 
+CFLAGS += -I deps/compiler-rt-builtins-riscv/compiler-rt/lib/builtins
+CFLAGS += -Wall -Werror -Wno-error=unused-command-line-argument -Wno-error=incompatible-library-redeclaration -Wno-error=invalid-noreturn -Wno-error=unused-function
+
+LDFLAGS := -static --gc-sections
+LDFLAGS += -Ldeps/compiler-rt-builtins-riscv/build -lcompiler-rt
 
 DOCKER_USER := $(shell id -u):$(shell id -g)
 DOCKER_EXTRA_FLAGS ?=
@@ -32,6 +41,10 @@ docker-interactive:
 deps/compiler-rt-builtins-riscv/build/libcompiler-rt.a:
 	cd deps/compiler-rt-builtins-riscv && $(MAKE) CC=$(CC) LD=$(LD) OBJCOPY=$(OBJCOPY) AR=$(AR) RANLIB=$(RANLIB)
 
+build/impl.o: include/ckb-c-stdlib/libc/src/impl.c
+	@echo $(CC) $(filter-out -DCKB_DECLARATION_ONLY, $(CFLAGS)) -c -o $@ $<
+	@$(CC) $(filter-out -DCKB_DECLARATION_ONLY, $(CFLAGS)) -c -o $@ $<
+
 lualib/liblua.a:
 	make -C lualib liblua.a
 
@@ -51,8 +64,8 @@ build/lua-loader.o: lua-loader/lua-loader.c
 # Note when -nostdlib is specified, libgcc is not linked to the program automatically.
 # Also note libgcc.a must be appended to the file list, simply -lgcc does not for some reason.
 # It seems gcc does not search libgcc in the install path.
-build/lua-loader: build/lua-loader.o lualib/liblua.a
-	$(LD) $(LDFLAGS) -o $@ $^ $(shell $(CC) --print-search-dirs | sed -n '/install:/p' | sed 's/install:\s*//g')libgcc.a
+build/lua-loader: build/lua-loader.o build/impl.o lualib/liblua.a deps/compiler-rt-builtins-riscv/build/libcompiler-rt.a
+	$(LD) $(LDFLAGS) -o $@ $^
 	cp $@ [email protected]
 	$(OBJCOPY) --strip-debug --strip-all $@