tyler
849306d65e
Build system - Add a single hand-written Makefile (GNU make + gcc, pure C). Builds raylib from vendored source and links rspektrum with no premake/lua. Targets: all/run/test/bench/clean; release default, DEBUG=1 for debug; ARCH overridable (defaults to -march=x86-64-v3). - Remove premake entirely: rspektrum.make, raylib.make, build/premake5* binaries, build/premake5.lua, build/ecc/*. The generated top-level Makefile was gitignored, so hand-edits to it were silently lost. - Vendor raylib src/ into the repo (was gitignored -> fresh clones could not build). Commit only src/ (~16MB); examples/projects stay local. Verified: a build from the git-tracked tree alone succeeds offline. - Release flags bumped to -O3 -ffast-math with a portable arch baseline (x86-64-v3 = AVX2+FMA on x64, SSE2 on x86). Confirmed FMA/AVX codegen in fft.o. FFT optimization (src/fft.c) - Precompute twiddle factors and the bit-reversal permutation once per size, cached as a small plan table (FFTW's idea, lightweight). Removes the per-butterfly cexpf() and per-element bit-twiddling that dominated. - 3.6x faster on the mlnl_samples.wav STFT workload (2048-pt, -O2 same flags both sides): 81us -> 22us per FFT. With the new -O3/-ffast-math/ AVX2 release flags stacked: ~15us (5.5x vs the old -O2 baseline). - Verified vs a double-precision reference DFT: 1e-6 relative error, round-trip 2.4e-7. Drop-in: same FFT() signature. Tests/bench (bench/) - fft_verify.c: FFT vs reference DFT + round-trip check (make test). - fft_bench.c: times the real STFT workload (make bench). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
111 lines
3.7 KiB
Makefile
111 lines
3.7 KiB
Makefile
# rspektrum - hand-written Makefile (GNU make + gcc, no premake/lua).
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#
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# Quick start:
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# make # release build -> bin/Release/rspektrum
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# make DEBUG=1 # debug build -> bin/Debug/rspektrum
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# make run # build + launch
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# make test # build + run the DSP correctness tests
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# make bench # build + run the FFT benchmark over mlnl_samples.wav
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# make clean # remove build artifacts for the current config
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#
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# Override the toolchain or flags on the command line, e.g.
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# make CC=clang
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# make ARCH="-march=native" # bleeding-edge tune for your own machine
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#
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# Pure C project (raylib is vendored as source and compiled in). Linux/X11.
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# ---- toolchain ----------------------------------------------------------
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CC ?= gcc
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AR ?= ar
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# ---- config: release (default) or DEBUG=1 -------------------------------
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# ARCH is the portable baseline tune; override to -march=native for a local
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# build. x86-64-v3 == AVX2 + FMA (~2013+), the sweet spot for the float FFT.
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ARCH ?= -march=x86-64-v3
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ifdef DEBUG
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BUILD := Debug
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OPT := -g
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DEFCONFIG := -DDEBUG
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else
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BUILD := Release
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OPT := -O3 -ffast-math $(ARCH)
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DEFCONFIG := -DNDEBUG
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STRIP := -s
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endif
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BINDIR := bin/$(BUILD)
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OBJDIR := obj/$(BUILD)
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TARGET := $(BINDIR)/rspektrum
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RAYLIB := $(BINDIR)/libraylib.a
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# ---- shared flags -------------------------------------------------------
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RAYLIB_SRC := build/external/raylib-master/src
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DEFINES := $(DEFCONFIG) -DPLATFORM_DESKTOP -DGRAPHICS_API_OPENGL_33 -D_GLFW_X11
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INCLUDES := -Isrc -Iinclude -I$(RAYLIB_SRC) -I$(RAYLIB_SRC)/external/glfw/include
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CFLAGS := -std=c17 -Wall -Wshadow $(OPT) $(DEFINES) $(INCLUDES)
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DEPFLAGS = -MMD -MP
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LDLIBS := -lpthread -lm -ldl -lrt -lX11
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LDFLAGS := $(STRIP)
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# ---- sources ------------------------------------------------------------
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# App: every src/*.c except the non-Linux platform backends.
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APP_SRC := $(filter-out src/platform_win32.c src/platform_web.c,$(wildcard src/*.c))
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APP_OBJ := $(patsubst src/%.c,$(OBJDIR)/app/%.o,$(APP_SRC))
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# raylib: explicit list of the modules we link (matches the vendored tree).
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RAY_MODULES := rcore rshapes rtextures rtext rmodels raudio rglfw
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RAY_OBJ := $(patsubst %,$(OBJDIR)/raylib/%.o,$(RAY_MODULES))
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DEPS := $(APP_OBJ:.o=.d) $(RAY_OBJ:.o=.d)
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# ---- top-level targets --------------------------------------------------
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.PHONY: all run test bench clean help
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.DEFAULT_GOAL := all
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all: $(TARGET)
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$(TARGET): $(APP_OBJ) $(RAYLIB) | $(BINDIR)
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@echo "Linking $@"
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$(CC) $(LDFLAGS) -o $@ $(APP_OBJ) $(RAYLIB) $(LDLIBS)
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$(RAYLIB): $(RAY_OBJ) | $(BINDIR)
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@echo "Archiving $@"
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$(AR) rcs $@ $(RAY_OBJ)
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# ---- compile rules ------------------------------------------------------
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$(OBJDIR)/app/%.o: src/%.c | $(OBJDIR)/app
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@echo " CC $<"
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$(CC) $(CFLAGS) $(DEPFLAGS) -c $< -o $@
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$(OBJDIR)/raylib/%.o: $(RAYLIB_SRC)/%.c | $(OBJDIR)/raylib
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@echo " CC $<"
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$(CC) $(CFLAGS) $(DEPFLAGS) -c $< -o $@
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# ---- dirs ---------------------------------------------------------------
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$(BINDIR) $(OBJDIR)/app $(OBJDIR)/raylib:
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@mkdir -p $@
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# ---- convenience --------------------------------------------------------
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run: $(TARGET)
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./$(TARGET)
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# DSP tests/benchmarks (fft.c is standalone, so they link it directly with the
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# same release flags this Makefile uses).
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test:
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$(MAKE) -C bench test CC="$(CC)" CFLAGS="-O3 -ffast-math $(ARCH) -Wall"
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bench:
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$(MAKE) -C bench bench CC="$(CC)" CFLAGS="-O3 -ffast-math $(ARCH) -Wall"
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clean:
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rm -rf $(OBJDIR) $(TARGET) $(RAYLIB)
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$(MAKE) -C bench clean
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help:
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@echo "Targets: all (default), run, test, bench, clean"
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@echo "Configs: release (default), or 'make DEBUG=1'"
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@echo "Vars: CC, AR, ARCH (e.g. ARCH=-march=native)"
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-include $(DEPS)
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