REALDIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
GMPDIR=$(REALDIR)/../gmp-6.3.0


# In OTHER_FLAGS:
# -DDAVINCI enables the davinci interface
# -DTRACE=traceOn enables tracing accoring to library function debugTrace()
# -DTRACE=0 disable tracing completely (or simply omit -DTRACE)
# -DSTACK_SIZE is the number of K words in the stack

# I don't know what causes Wstringop-overflows, but they seem to cause no problems.
# Lots of the Wunused-but-set-variables are assignments for effect, e.g. POP
# There is one Wunused-varable: it defines a static symbol that I presume gets linked to.
# Lots of the Wunused-paramters are used to occupy pointers that usually do something.
# The Wsign-compares are internal to gmp-impl.h
# For all of these, I have gone through all the warnings with them enabled,
# and verified that the warning is actually essential.
CFLAGS = \
	$(INCLUDE) \
	-std=c11 \
	-Wall \
	-Wextra \
	-Wpedantic \
	-Wno-stringop-overflow \
	-Wno-unused-but-set-variable \
	-Wno-unused-variable \
	-Wno-unused-parameter \
	-Wno-sign-compare \
	-DPACK_DIGITS \
	-DDEFAULT_FORCE_COUNT=1 \
	-DSTACK_SIZE=20 \
	-DFORCE_DEC_UPPER_BOUND=10000 \
	-DREALDIR=\\\"$(REALDIR)\\\" \
	-O3

DEBUGFLAGS =  \
	$(INCLUDE) \
	-ggdb \
	-gdwarf-4 \
	-std=c11 \
	-Wall \
	-Wextra \
	-Wpedantic \
	-DPACK_DIGITS \
	-DDEFAULT_FORCE_COUNT=1 \
	-DSTACK_SIZE=20 \
	-DFORCE_DEC_UPPER_BOUND=10000 \
	-DREALDIR=\\\"$(REALDIR)\\\" \
	-O0

# The following flags are not used. They are here for convenience; they can
# be cut and pasted easily into the list above
OTHER_FLAGS = \
	-pg \
	-lgmp \
	-DTRACE=traceOn \
	-DTRACE=1 \
	-DDEFAULT_FORCE_COUNT=1 \
	END

LIB=$(GMPDIR)/libgmp.la

INCLUDE = \
    -I.. \
    -I$(GMPDIR) \
    -I$(GMPDIR)/mpn/

CC = gcc
FLAGS_TO_PASS = \
	"CC=$(CC)" \
	"CFLAGS=$(CFLAGS)" \
	"REALDIR=$(REALDIR)"
	"GMPDIR=$(GMPDIR)"

real.a : force
	cd base; $(MAKE) $(FLAGS_TO_PASS)
	cd math-lib; $(MAKE) $(FLAGS_TO_PASS)
	ar rc libreal.a math-lib/*.o base/*.o

clean:
	cd base; $(MAKE) clean
	cd math-lib; $(MAKE) clean
	cd tests; $(MAKE) clean
	rm -f libreal.a

force:
.PHONY: force