# Variables to override
#
# CC            C compiler
# CROSSCOMPILE	crosscompiler prefix, if any
# CFLAGS	compiler flags for compiling all C files
# ERL_CFLAGS	additional compiler flags for files using Erlang header files
# ERL_EI_LIBDIR path to libei.a
# LDFLAGS	linker flags for linking all binaries
# ERL_LDFLAGS	additional linker flags for projects referencing Erlang libraries

# Look for the EI library and header files
# For crosscompiled builds, ERL_EI_INCLUDE_DIR and ERL_EI_LIBDIR must be
# passed into the Makefile.

# Set Erlang-specific compile and linker flags
ERL_CFLAGS ?= -I$(ERL_EI_INCLUDE_DIR)
ERL_LDFLAGS ?= -L$(ERL_EI_LIBDIR)

LDFLAGS += -fPIC -shared  -dynamiclib
CFLAGS ?= -fPIC -O2 -Wall -Wextra -Wno-unused-parameter -std=c99

ifeq ($(CROSSCOMPILE),)
ifeq ($(shell uname),Darwin)
LDFLAGS += -undefined dynamic_lookup
endif
endif

NIF=priv/line.so priv/matrix.so

calling_from_make:
	mix compile

all: priv $(NIF)

pull_deps:
	mix local.hex --force
	mix local.rebar --force
	mix deps.get

linter:
	mix format --check-formatted
	# mix credo

unit_test:
	mix coveralls.json

docs_report:
	mix inch.report

priv:
	mkdir -p priv

%.o: %.c
	$(CC) -c $(ERL_CFLAGS) $(CFLAGS) -o $@ $<

priv/line.so: c_src/line.o
	$(CC) $^ $(ERL_LDFLAGS) $(LDFLAGS) -o $@

priv/matrix.so: c_src/matrix.o
	$(CC) $^ $(ERL_LDFLAGS) $(LDFLAGS) -o $@

clean:
	$(RM) $(NIF) c_src/*.o