build: make makefile work even if there are spaces in its path

This is a partial fix for:

emqx#33

Unfortunately, the jq library itself does not compile when there are
spaces in its path so we have to fix this issue in EMQX's jq fork before
the above issue is completely fixed. See:

jqlang/jq#2453

c_src/Makefile

@@ -1,25 +1,25 @@
 # Based on c_src.mk from erlang.mk by Loic Hoguin <[email protected]>
 UNAME_SYS := $(shell uname -s)
 ARCH := $(shell uname -m)
-CURDIR := $(shell pwd)
-BASEDIR := $(abspath $(CURDIR)/..)
-VERSION := $(shell escript get_version.erl "$(BASEDIR)/src/jq_nif.erl") 
+CURDIR := .
+BASEDIR := $(CURDIR)/..
+VERSION := $(shell escript get_version.erl ../src/jq_nif.erl) 
 VERSION := $(strip $(VERSION))
 JQERLMODSRC := $(BASEDIR)/src/jq_nif.erl
 
 PROJECT ?= $(notdir $(BASEDIR))
 PROJECT := $(strip $(PROJECT))
 NIF_MODULE := jq_nif
 JQURL := https://github.com/emqx/jqc.git
-JQSRC_DIR := $(CURDIR)/libs/jqc
+JQSRC_DIR := libs/jqc
 JQSRC := $(JQSRC_DIR)/src/jv.c
 RDSURL := https://github.com/emqx/c_reusable_data_structures.git
-RDSSRC_DIR := $(CURDIR)/libs/c_reusable_data_structures
+RDSSRC_DIR := libs/c_reusable_data_structures
 RDSSRC := $(RDSSRC_DIR)/Makefile
 LIBJQ_DIR ?= $(JQSRC_DIR)/.libs
 LIBJQ_PREFIX := /usr/local
-EXT_LIBS := $(CURDIR)/ext_libs
-ERL_PORT_PROGRAM := $(BASEDIR)/priv/erlang_jq_port
+EXT_LIBS := ext_libs
+ERL_PORT_PROGRAM := ../priv/erlang_jq_port
 ifeq ($(UNAME_SYS), Darwin)
 	LIBJQ := libjq.1.dylib
 	LIBONIG := libonig.4.dylib
@@ -49,8 +49,8 @@ DS_INCLUDE_DIR ?= libs/c_reusable_data_structures
 
 ERL_INTERFACE_LIB_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts\", [code:lib_dir(erl_interface, lib)]).")
 
-PRIV_DIR = $(CURDIR)/../priv
-C_SRC_DIR = $(CURDIR)
+PRIV_DIR = ../priv
+C_SRC_DIR = ./
 C_SRC_OUTPUT ?= $(PRIV_DIR)/$(NIF_MODULE)$(VERSION).so
 
 # System type and C compiler/flags.
@@ -109,7 +109,7 @@ COMPILE_CPP = $(cpp_verbose) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c
 ifeq ($(JQ_MEMSAN_DEBUG), 1)
 $(C_SRC_OUTPUT): $(OBJECTS) port_nif_common.h
 else
-$(C_SRC_OUTPUT): $(OBJECTS) $(ERL_PORT_PROGRAM) port_nif_common.h
+$(C_SRC_OUTPUT): $(RDSSRC) $(OBJECTS) $(ERL_PORT_PROGRAM) port_nif_common.h
 endif
 	@mkdir -p $(BASEDIR)/priv/
 	$(link_verbose) $(CC) $(OBJECTS) $(LDFLAGS) $(LDLIBS) -o $(C_SRC_OUTPUT)
@@ -132,22 +132,22 @@ $(ERL_PORT_PROGRAM): $(PORT_OBJECTS)
 	$(COMPILE_C) $(OUTPUT_OPTION) $<
 
 $(JQSRC):
-	git clone -b jq-1.6-emqx --single-branch $(JQURL) $(JQSRC_DIR)
-	((cd $(JQSRC_DIR) && git checkout 51df83ccf4808867eee79a011c71a93a121be1b6) || \
+	git clone -b jq-1.6-emqx --single-branch "$(JQURL)" "$(JQSRC_DIR)"
+	((cd "$(JQSRC_DIR)" && git checkout 51df83ccf4808867eee79a011c71a93a121be1b6) || \
 	     (echo "Failed to check out jq commit" && \
-	      rm -r $(JQSRC_DIR) && \
+	      rm -r "$(JQSRC_DIR)" && \
 	      false))
 
 $(RDSSRC):
-	git clone -b master --single-branch $(RDSURL) $(RDSSRC_DIR)
-	((cd $(RDSSRC_DIR) && git checkout 77c7a96416065a839417e5078fce9ba9a14982dc) || \
+	git clone -b master --single-branch "$(RDSURL)" "$(RDSSRC_DIR)"
+	((cd "$(RDSSRC_DIR)" && git checkout 77c7a96416065a839417e5078fce9ba9a14982dc) || \
 	     (echo "Failed to check out c_reusable_data_structures commit" && \
-	      rm -r $(RDSSRC_DIR) && \
+	      rm -r "$(RDSSRC_DIR)" && \
 	      false))
 
 $(LIBJQ_NAME): $(JQSRC)
 	#ls -lart .libs/ modules/oniguruma/src/.libs/
-	cd $(JQSRC_DIR) && \
+	(cd $(JQSRC_DIR) && \
 	git submodule update --init && \
 	export CC="$(CC)" && \
 	export CFLAGS="$(EXTRA_C_FLAGS)" && \
@@ -156,12 +156,10 @@ $(LIBJQ_NAME): $(JQSRC)
 	./configure --with-oniguruma=builtin --disable-maintainer-mode --prefix=$(LIBJQ_PREFIX) && \
 	make -C modules/oniguruma/ && \
 	make src/builtin.inc && \
-	make libjq.la && \
+	make libjq.la) && \
 	(mkdir $(EXT_LIBS) || true) && \
-	cp .libs/libjq.* $(EXT_LIBS)/ && \
-	cp modules/oniguruma/src/.libs/libonig.* $(EXT_LIBS)/ && \
-	cd $(C_SRC_DIR)
-
+	cp $(JQSRC_DIR)/.libs/libjq.* $(EXT_LIBS)/ && \
+	cp $(JQSRC_DIR)/modules/oniguruma/src/.libs/libonig.* $(EXT_LIBS)/
 clean:
 	@rm -f $(OBJECTS)
 	@rm -f $(PORT_OBJECTS)