Makefile.defs

MASTER_DIR := $(TC_DIR)/firmware/master

INCLUDES += \
    -Isrc \
    -I$(MASTER_DIR)/common \
    -I$(MASTER_DIR)/sim \
    -I$(TC_DIR)/firmware/include \
    -I$(TC_DIR)/sdk/include \

# Relocated listings from the earlier Cube firmware build
FIRMWARE_RST := ../firmware/cube/src/*.rst

# Non-userspace simulator build
FLAGS += -DNOT_USERSPACE -DSIFTEO_SIMULATOR -D__STDC_FORMAT_MACROS

# Versioning
FLAGS += -DSDK_VERSION=$(shell git describe --tags)

OSVERSION := $(shell python $(TC_DIR)/tools/osversion.py)
FLAGS += -DOS_VERSION=$(OSVERSION)

# Disable unwanted warnings, but be generally pretty pedantic
WARNFLAGS += -Wall -Werror -Wno-unused -Wno-strict-aliasing -Wno-uninitialized

# ensure STATIC_ASSERT() functions in as many cases as possible
WARNFLAGS += -Wvla

# Resources
ifeq ($(BUILD_PLATFORM), windows32)
	OBJS += resources/winres.o
endif

# Need to set -march in order to use atomic op intrinsics, but we
# should be relatively conservative about CPU type so that this runs
# everywhere. In particular, -march=native is very much NOT what we
# want, since we need to avoid using Intel-only or AMD-only extensions
# like LZCNT.
#
# Looks like we currently only need to specify this explicitly on Win32.
# Keep in mind that 64-bit platforms will need different flags!
#
# XXX: i686 is possibly way too conservative. We were using pentium4
#      here for a while, but the mingw32 GCC apparently has some really
#      boneheaded stack alignment bugs with SSE2 instructions, in which
#      it over-eagerly uses SSE2 moves/fills on data that doesn't meet
#      the minimum 16-byte alignment.

ifeq ($(BUILD_PLATFORM), windows32)
    FLAGS += -march=i686 -mtune=core2
endif
    
# Linker flags
ifneq ($(BUILD_PLATFORM),Darwin)
	# Not supported on Apple's LLVM GCC frontend
	LIBS += -Wl,--gc-sections
endif

# Config options
ifeq ($(MOTHERSHIP),1)
	FLAGS += -DMOTHERSHIP
endif
ifeq ($(DEBUG),1)
	FLAGS += -DDEBUG
endif
ifeq ($(CODEC_DEBUG),1)
	FLAGS += -DDEBUG -DCODEC_DEBUG
endif

# Debug / optimization
#
# Unsurprisingly, compiler optimization produces a very dramatic
# difference in performance. Leave these options on at all times
# unless you have a very good reason to do otherwise.
#
# Do NOT publish unoptimized builds. Besides running several times
# slower, they will reveal too much about how our firmware works. The
# optimized builds are significantly harder to reverse engineer.
# Please only use the REALLY_DEBUG_SIFTULATOR environment var to
# disable these options. Note that doing so will automatically
# change the name of the binary to help distinguish this from an
# optimized (and distributable) build.
#
# -fomit-frame-pointer is actually really important here. It helps
# a lot with our SBT code, since there are many tiny function calls.
#
# -O4 is like -O3, but includes link-time optimization on Mac OS.
# XXX: Currently, -O4 seems to break our GUI... not using it at the moment.

ifeq ($(REALLY_DEBUG_SIFTULATOR),1)
    FLAGS += -g
    BIN := siftulator-unoptimized
    LOWERCASE_BIN := siftulator-unoptimized
else
    FLAGS += -O3 -fomit-frame-pointer
endif

# Automatic dependency generation (*.d files)
FLAGS += -MMD

# Symbol table trimming
ifeq ($(BUILD_PLATFORM), Darwin)
	LIBS += -Xlinker -unexported_symbol -Xlinker "*"
endif