PNGQrush/Makefile at master · killerdevildog/PNGQrush · GitHub

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# Makefile for PNGqrush (legacy build system)
#
# This Makefile builds the thirdparty libraries (zlib and libpng) first,
# then builds pngqrush against them.
#
# For modern builds, use CMake instead (recommended):
#   cmake --preset release && cmake --build build/release

# Directory structure
SRCDIR = src
THIRDPARTY = thirdparty
ZLIBDIR = $(THIRDPARTY)/zlib
LIBPNGDIR = $(THIRDPARTY)/libpng
BUILDDIR = build/make

# Compiler settings
CC = gcc
AR = ar
RM = rm -rf
MKDIR = mkdir -p

CFLAGS = -std=c11 -O3 -funroll-loops -fomit-frame-pointer
CFLAGS += -Wall -Wextra

# Target
PNGQRUSH = pngqrush

# =============================================================================
# zlib configuration
# =============================================================================
ZLIB_BUILDDIR = $(BUILDDIR)/zlib
ZLIB_LIB = $(ZLIB_BUILDDIR)/libz.a

ZLIB_CFLAGS = $(CFLAGS) -I$(ZLIBDIR)

ZLIB_SRCS = adler32.c compress.c crc32.c deflate.c gzclose.c gzlib.c \
            gzread.c gzwrite.c infback.c inffast.c inflate.c inftrees.c \
            trees.c uncompr.c zutil.c

ZLIB_OBJS = $(ZLIB_SRCS:%.c=$(ZLIB_BUILDDIR)/%.o)

# =============================================================================
# libpng configuration
# =============================================================================
PNG_BUILDDIR = $(BUILDDIR)/libpng
PNG_LIB = $(PNG_BUILDDIR)/libpng.a

PNG_CFLAGS = $(CFLAGS) -I$(LIBPNGDIR) -I$(ZLIB_BUILDDIR) -I$(ZLIBDIR)

PNG_SRCS = png.c pngerror.c pngget.c pngmem.c pngpread.c pngread.c \
           pngrio.c pngrtran.c pngrutil.c pngset.c pngtrans.c pngwio.c \
           pngwrite.c pngwtran.c pngwutil.c

# Add architecture-specific files
UNAME_M := $(shell uname -m)
ifeq ($(UNAME_M),x86_64)
  PNG_SRCS += intel/intel_init.c intel/filter_sse2_intrinsics.c
  PNG_CFLAGS += -DPNG_INTEL_SSE_OPT=1
endif
ifeq ($(UNAME_M),aarch64)
  PNG_SRCS += arm/arm_init.c arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
  PNG_CFLAGS += -DPNG_ARM_NEON_OPT=2
endif

PNG_OBJS = $(PNG_SRCS:%.c=$(PNG_BUILDDIR)/%.o)

# =============================================================================
# pngqrush configuration
# =============================================================================
PNGQRUSH_CFLAGS = $(CFLAGS) -I$(SRCDIR) -I$(LIBPNGDIR) -I$(PNG_BUILDDIR) -I$(ZLIBDIR)
PNGQRUSH_CFLAGS += -DNO_GZ -DPNGCRUSH_TIMERS=11 -DPNGCRUSH_USE_CLOCK_GETTIME=1

PNGQRUSH_LDFLAGS = -L$(PNG_BUILDDIR) -L$(ZLIB_BUILDDIR)
PNGQRUSH_LIBS = -lpng -lz -lm

# =============================================================================
# Targets
# =============================================================================

.PHONY: all clean dirs zlib libpng pnglibconf

all: dirs pnglibconf zlib libpng $(PNGQRUSH)

dirs:
	@$(MKDIR) $(ZLIB_BUILDDIR)
	@$(MKDIR) $(PNG_BUILDDIR)/intel
	@$(MKDIR) $(PNG_BUILDDIR)/arm
	@$(MKDIR) $(PNG_BUILDDIR)/powerpc
	@$(MKDIR) $(PNG_BUILDDIR)/mips-msa

# Generate pnglibconf.h if it doesn't exist
pnglibconf:
	@if [ ! -f $(LIBPNGDIR)/pnglibconf.h ]; then \
		cp $(LIBPNGDIR)/scripts/pnglibconf.h.prebuilt $(LIBPNGDIR)/pnglibconf.h; \
		echo "Generated pnglibconf.h from prebuilt"; \
	fi

# =============================================================================
# zlib
# =============================================================================
zlib: $(ZLIB_LIB)

$(ZLIB_BUILDDIR)/%.o: $(ZLIBDIR)/%.c
	$(CC) $(ZLIB_CFLAGS) -c -o $@ $<

$(ZLIB_LIB): $(ZLIB_OBJS)
	$(AR) rcs $@ $^

# =============================================================================
# libpng
# =============================================================================
libpng: $(PNG_LIB)

$(PNG_BUILDDIR)/%.o: $(LIBPNGDIR)/%.c
	@$(MKDIR) $(dir $@)
	$(CC) $(PNG_CFLAGS) -c -o $@ $<

$(PNG_LIB): $(PNG_OBJS)
	$(AR) rcs $@ $^

# =============================================================================
# pngqrush
# =============================================================================
$(PNGQRUSH): $(SRCDIR)/pngcrush.c $(PNG_LIB) $(ZLIB_LIB)
	$(CC) $(PNGQRUSH_CFLAGS) $(PNGQRUSH_LDFLAGS) -o $@ $(SRCDIR)/pngcrush.c $(PNGQRUSH_LIBS)

# =============================================================================
# Clean
# =============================================================================
clean:
	$(RM) $(PNGQRUSH)
	$(RM) $(BUILDDIR)

distclean: clean
	$(RM) $(LIBPNGDIR)/pnglibconf.h