# Ice Rage loader.

#

# Always cross-compiles to arm-linux-gnueabihf: the R36S runs an aarch64

# kernel, but the only native library the game ships is armeabi-v7a, and the

# bionic ELF loader has to map it into a process of the same word size.

#

# Sources are picked up by wildcard on purpose — the loader, the JNI shim and

# the libc thunks all land as new directories in later milestones and must not

# each require a Makefile edit.

ARCH ?= arm-linux-gnueabihf

CROSS ?= $(ARCH)-

CXX := $(CROSS)g++

PKG_CONFIG ?= $(CROSS)pkg-config

TARGET := build/icerage

OBJDIR := build/obj

PKGS := sdl2 zlib libzip

OPT ?= -O2 -g

WARN := -Wall -Wextra -Wno-unused-parameter -Werror=return-type

# thunks/libc/generated holds the bionic export tables produced by

# tools/generate_libc.sh. They are checked in because the build image has no

# clang; see that script for why.

INCLUDES := -I. -Isrc -Iandroid -Iloader -Ithunks -Ithunks/libc \

-Ithunks/libc/generated -Ijni

CPPFLAGS := $(INCLUDES) $(shell $(PKG_CONFIG) --cflags $(PKGS)) -MMD -MP

# gnu++20: the vendored ELF loader uses std::string::starts_with.

CXXFLAGS := -std=gnu++20 $(OPT) $(WARN) -fno-strict-aliasing -fuse-cxa-atexit

LDFLAGS := $(OPT)

LDLIBS := $(shell $(PKG_CONFIG) --libs $(PKGS)) -pthread -lm -ldl -lrt -lbsd

SRCDIRS := src android loader thunks/libc thunks/khronos jni jni/classes

SRCS := $(foreach d,$(SRCDIRS),$(wildcard $(d)/*.cpp))

OBJS := $(patsubst %.cpp,$(OBJDIR)/%.cpp.o,$(SRCS))

DEPS := $(OBJS:.o=.d)

all: $(TARGET)

$(TARGET): $(OBJS)

@mkdir -p $(@D)

$(CXX) $(LDFLAGS) -o $@ $^ $(LDLIBS)

$(OBJDIR)/%.cpp.o: %.cpp

@mkdir -p $(@D)

$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@

# The .so files the zip has to carry. Generated, never checked in: they are

# Debian binaries and tools/collect_libs.sh reproduces them exactly.

#

# The glibc floor is checked here rather than at package time because this is

# the first moment the full set of shipped ELFs exists. It is a gate, not a

# report: a binary that needs a newer glibc than the oldest supported CFW dies

# at load on the device with "GLIBC_x.y not found", and nothing in the harness

# can see it - the harness runs on a modern host.

libs: $(TARGET)

tools/collect_libs.sh $(TARGET) build/libs.armhf

tools/check_glibc_floor.sh $(TARGET) build/libs.armhf

clean:

rm -rf build

.PHONY: all clean libs

-include $(DEPS)