Makefile.globals

# This file gets included by platform (cam) builds
# and module builds.
#
# It should only contain things common for both.
# Parts shared within platform or module code, but no further,
# should be in platform/Makefile and modules/Makefile,
# respectively.

ifndef TOP_DIR
    # don't error for tcc builds
    ifndef TOP
        $(error TOP_DIR not set - did you run or include this file from somewhere unexpected?)
    endif
endif

ARM_BINPATH = /usr/bin
ARM_ABI = none-eabi
CROSS_COMPILE = $(ARM_BINPATH)/arm-$(ARM_ABI)-
HOST_CC = gcc
HOST_AR=$(shell which ar)
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
AR = $(CROSS_COMPILE)ar
OBJCOPY = $(CROSS_COMPILE)objcopy
STRIP = $(CROSS_COMPILE)strip

STAT_CMD = stat -c "%n: %s bytes"
GREP = grep
READELF = readelf
AWK = awk
DATE = date -u
CP = cp
MV = mv
PYTHON = python3
PYTHON3 = python3
XOR_CHK=$(BUILD_TOOLS_DIR)/xor_chk

DIETLIB_VERSION=0.33
DIETLIBC_OPT_LEVEL=Os
NEWLIB_OPT_LEVEL=O3
NEWLIB_PATH=$(SRC_DIR)/libs/arm-$(ARM_ABI)-$(NEWLIB_OPT_LEVEL)
DIETLIBC_PATH=$(SRC_DIR)/libs/dietlib-$(DIETLIB_VERSION)-$(ARM_ABI)-$(DIETLIBC_OPT_LEVEL)

# Static libraries used
ARM_LIBGCC_A=$(shell $(CC) -print-libgcc-file-name)
NEWLIB_LIBM_A=$(NEWLIB_PATH)/libm.a
NEWLIB_LIBC_A=$(NEWLIB_PATH)/libc.a
DIETLIBC_A=$(DIETLIBC_PATH)/dietlibc.a

BUILD_TOOLS_DIR = $(TOP_DIR)/build_tools
MODULES_DIR = $(TOP_DIR)/modules
INSTALLER_FIR = ML-SETUP.FIR

ML_LIBC = dietlibc.a newlib-libc.a newlib-libm.a gcc-libgcc.a

CFLAGS = -Os -D__ARM__ \
    -Wp,-MMD,$(patsubst %.o,%.d,$(dir $@)$(notdir $@)) \
    -Wp,-MT,$@ \
    -nostdlib \
    -I$(TOP_DIR)/include \
    -Wall \
    -Wextra \
    -Werror-implicit-function-declaration \
    -Wdouble-promotion \
    -Winline \
    -Wundef \
    -Wno-unused-parameter \
    -Wno-unused-function \
    -Wno-format \
    -fomit-frame-pointer \
    -fno-strict-aliasing \
    -ffast-math \
    -fsingle-precision-constant \
    -fno-builtin-printf \
    -fno-common \
    -fno-extended-identifiers \
    -std=gnu99 \
    -I$(SRC_DIR) \
    -ggdb3

CFLAGS += \
    -DCONFIG_MAGICLANTERN=1 \
    -DCONFIG_DEBUGMSG=$(CONFIG_DEBUGMSG) \

CDEPS_FLAGS = -MP -MD

ifeq ($(CONFIG_QEMU),y)
    CFLAGS += -DCONFIG_QEMU
endif

# Allow devs to make warnings break builds
ifeq ($(FATAL_WARNINGS),y)
    CFLAGS += -Werror
endif

ifeq ($(CONFIG_GDB),y)
    CFLAGS += -DCONFIG_GDB
    ML_OBJS += $(BUILD_DIR)/gdb.o
endif

ifeq ($(CONFIG_GDBSTUB),y)
    CFLAGS += -DCONFIG_GDB -DCONFIG_GDBSTUB
endif

# This looks like some PTP client-server hack allowing
# USB control of ML including some debug functionality.
ifeq ($(CONFIG_PTP),y)
    CFLAGS += -DCONFIG_PTP
    ML_OBJS += $(BUILD_DIR)/ptp.o
endif

ifeq ($(CONFIG_PTP_CHDK),y)
    ML_OBJS += $(BUILD_DIR)/ptp-chdk.o
endif

ifeq ($(CONFIG_PTP_ML),y)
    ML_OBJS += $(BUILD_DIR)/ptp-ml.o
endif

ifeq ($(CONFIG_CONSOLE),y)
    CFLAGS += -DCONFIG_CONSOLE
    ML_OBJS += $(BUILD_DIR)/console.o
endif

ifeq ($(CONFIG_TCC),y)
    ifneq ($(CONFIG_CONSOLE),y)
        $(error CONFIG_TCC requires CONFIG_CONSOLE = y, please enable it)
    endif
    CFLAGS += -DCONFIG_TCC
    ML_OBJS += $(BUILD_DIR)/tcc-glue.o \
               $(BUILD_DIR)/tcc/libtccx.o
endif

ifeq ($(CONFIG_TINYPY),y)
    LFLAGS += -u pow -u qsort -u strstr -u atof
endif

# This var is sometimes set on a per cam basis,
# we don't want to use it uninit
ifdef CONFIG_LVAPP_HACK_RELOC
    ifeq ($(CONFIG_LVAPP_HACK_RELOC),y)
        ML_OBJS += $(BUILD_DIR)/liveview.o $(BUILD_DIR)/reloc.o
    endif
endif

# evaluate once and only when used
# https://stackoverflow.com/a/28542922
# example: FOO = $(call eval_once,FOO,$(shell command))
define eval_once
$(eval $1 := $2)$(value $1)
endef