Wildcard Pattern Matching in Make - makefile

Question

Here is my project structure.
| - src
| - boot
| - table.s
| - boot.s
| - machine
| - revb
| - memmap
| - vars.s
| - os
| - utils
| - ...lots here
I am grouping features by folder, and have a special folder for machine specific code, link scripts, anything.
The problem I am having with make is that I can't seem to get the Pattern match to work.
The below runs and builds the .o files.
#This gets repetative as every file needs to have a recipe by itself.
$(TARGET_DIR)/hash.o : $(SRC_DIR)/utils/hash.s machine
#echo "compiling $<"
$(CC) $(CFLAGS) $< -o $#
#echo "assembly dump $#"
$(DUMP) -D $# > $#.list
The below does NOT work. It doesn't run any of the commands.
#if this works that would be perfect every folder/file will be a recipe!
$(TARGET_DIR)/%.o : $(SRC_DIR)/%.s machine
#echo "compiling $<"
$(CC) $(CFLAGS) $< -o $#
#echo "assembly dump $#"
$(DUMP) -D $# > $#.list
Nothing runs at all, For some reason no files seem to match that pattern.
I have also tried this.
# if this works, it would be a bit annoying as this is per feature recipe/target.
$(TARGET_DIR)/%.o : $(SRC_DIR)/boot/%.s machine
#echo "compiling $<"
$(CC) $(CFLAGS) $< -o $#
#echo "assembly dump $#"
$(DUMP) -D $# > $#.list
Edit
full makefile for reference
CFLAGS = -march=rv32i -mabi=ilp32
CC = riscv32-unknown-linux-gnu-as
LINKER = riscv32-unknown-linux-gnu-ld
DUMP = riscv32-unknown-linux-gnu-objdump
COPY = riscv32-unknown-linux-gnu-objcopy
SRC_DIR = src
TARGET_DIR = target
MACHINE_FILES_DIR = machine
TARGET_MACHINE = revb
# vizoros : $(TARGET_DIR)/%.o
# $(LINKER) $(TARGET_DIR)/boot.o $(TARGET_DIR)/table.o $(TARGET_DIR)/os.o $(TARGET_DIR)/hash.o -T $(TARGET_DIR)/memmap -o $(TARGET_DIR)/$#.elf
# $(DUMP) -D $(TARGET_DIR)/$#.elf > $(TARGET_DIR)/$#.list
$(TARGET_DIR)/%.o : $(SRC_DIR)/boot/%.s machine
#echo "compiling $<"
$(CC) $(CFLAGS) $< -o $#
#echo "assembly dump $#"
$(DUMP) -D $# > $#.list
machine: folders
cp -r $(SRC_DIR)/$(MACHINE_FILES_DIR)/$(TARGET_MACHINE)/. $(TARGET_DIR)
folders:
mkdir -p $(TARGET_DIR)
.phony: clean
clean:
rm -rf $(TARGET_DIR)

Answer 1

As with your other question, you are expecting too much fancy capability from make. Make is a very simple tool. It will not go looking around your directories for files that could be built. It will build only exactly what you ask it to build. It will not infer matching files based on heuristics: it will match only exact strings.
Make always works backwards: it starts with the final target you ask it to build and finds a rule that can build that. Then it looks at each of the prerequisites of that final target and finds a rule that can build each one of those. Then it looks at any prerequisites of each of the prerequisites of those, etc. Once it has built (or found source files for) all the prerequisites of a target, it builds that target, then walks back up until finally it builds the final target you asked for.
In your makefile above you've commented out the "final target" you want built (vizoros), so of course make will not build it.
I'm just going to give you a makefile that solves your problem... if you want to understand what it does please consult the GNU make manual. Note I haven't actually tried this, I just wrote it here. Also note I omitted the whole machine thing because I don't understand what it's supposed to do and you didn't really define it.
CFLAGS = -march=rv32i -mabi=ilp32
CC = riscv32-unknown-linux-gnu-as
LINKER = riscv32-unknown-linux-gnu-ld
DUMP = riscv32-unknown-linux-gnu-objdump
COPY = riscv32-unknown-linux-gnu-objcopy
SRC_DIR = src
TARGET_DIR = target
MACHINE_FILES_DIR = machine
TARGET_MACHINE = revb
# Find all .s files under SRC_DIR
SRCS := $(shell find $(SRC_DIR) -name \*.s)
# Use VPATH with a list of directories to be searched for
VPATH := $(sort $(dir $(SRCS)))
# Convert all .s files into .o files directly under TARGET_DIR
# First strip off the directory, then convert
OBJS := $(patsubst %.s,$(TARGET_DIR)/%.o,$(notdir $(SRCS)))
# Define the final target and provide all the object files as prerequisites
$(TARGET_DIR)/vizoros.elf : $(OBJS)
mkdir -p $(#D)
$(LINKER) $^ -T $(TARGET_DIR)/memmap -o $#
$(DUMP) -D $# > $(#:.elf=.list)
# Define a pattern rule to build an object file in TARGET_DIR
# The source file will be searched for via VPATH
$(TARGET_DIR)/%.o : %.s
mkdir -p $(#D)
#echo "compiling $<"
$(CC) $(CFLAGS) -c $< -o $#
#echo "assembly dump $#"
$(DUMP) -D $# > $#.list
# It must be .PHONY, not .phony: make, like all POSIX tools, is
# case-sensitive
.PHONY: clean
clean:
rm -rf $(TARGET_DIR)
References:
GNU make manual
= vs := variables
shell function
dir and notdir functions
sort and patsubst functions
VPATH
Substitution references
Automatic variables
Phony targets
Also note you had an error in your compile command; you were missing the -c option which tells the compiler to generate an object file rather than a final executable file.