Makefile: remove MACOS specific logic

Try to understand where the Makefile fails.

Signed-off-by: Matteo Cafasso <noxdafox@gmail.com>

Makefile

@@ -6,7 +6,6 @@ MAKEFILE_NAME		?= makefile
 SHARED_INCLUDE_DIR	?= /usr/local/include
 SHARED_LIBRARY_DIR	?= /usr/local/lib
 TARGET_ARCH		?= $(shell uname -m)
-LDLIBS			?= -lm
 
 # platform detection
 PLATFORM = $(shell uname -s)
@@ -20,30 +19,28 @@ clips_source:
 	unzip -jo clips.zip -d clips_source
 
 ifeq ($(PLATFORM),Darwin) # macOS
-	ifneq "$(wildcard /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib)" ""
-		LDLIBS += -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib
-	endif
 clips: clips_source
-	$(MAKE) -f $(MAKEFILE_NAME) -C clips_source                            \
-		CFLAGS="-std=c99 -O3 -fno-strict-aliasing -fPIC"               \
-		LDLIBS="$(LDLIBS)"
-	ld clips_source/*.o $(LDLIBS) -dylib -arch $(TARGET_ARCH)              \
+	$(MAKE) -f $(MAKEFILE_NAME) -C clips_source				\
+		CFLAGS="-std=c99 -O3 -fno-strict-aliasing -fPIC"		\
+		LDLIBS="-lm"
+	ld clips_source/*.o -lm -dylib -arch $(TARGET_ARCH)			\
 		-o clips_source/libclips.so
 else
 clips: clips_source
-	$(MAKE) -f $(MAKEFILE_NAME) -C clips_source                            \
-		CFLAGS="-std=c99 -O3 -fno-strict-aliasing -fPIC"               \
+	$(MAKE) -f $(MAKEFILE_NAME) -C clips_source				\
+		CFLAGS="-std=c99 -O3 -fno-strict-aliasing -fPIC"		\
 		LDLIBS="-lm -lrt"
 	ld -G clips_source/*.o -o clips_source/libclips.so
 endif
 
 clipspy: clips
-	$(PYTHON) setup.py build_ext --include-dirs=clips_source/ --library-dirs=clips_source/
+	$(PYTHON) setup.py build_ext --include-dirs=clips_source/ 		\
+		--library-dirs=clips_source/
 	$(PYTHON) setup.py sdist bdist_wheel
 
 test: clipspy
 	cp build/lib.*/clips/_clips*.so clips
-	LD_LIBRARY_PATH=$LD_LIBRARY_PATH:clips_source			       \
+	LD_LIBRARY_PATH=$LD_LIBRARY_PATH:clips_source				\
 		$(PYTHON) -m pytest -v
 
 install-clips: clips
@@ -52,11 +49,11 @@ install-clips: clips
 	install -d $(SHARED_INCLUDE_DIR)/clips
 	install -m 644 clips_source/*.h $(SHARED_INCLUDE_DIR)/clips/
 	install -d $(SHARED_LIBRARY_DIR)/
-	install -m 644 clips_source/libclips.so                                \
+	install -m 644 clips_source/libclips.so					\
 	 	$(SHARED_LIBRARY_DIR)/libclips.so.$(CLIPS_VERSION)
-	ln -sf $(SHARED_LIBRARY_DIR)/libclips.so.$(CLIPS_VERSION)	       \
+	ln -sf $(SHARED_LIBRARY_DIR)/libclips.so.$(CLIPS_VERSION)		\
 	 	$(SHARED_LIBRARY_DIR)/libclips.so.6
-	ln -sf $(SHARED_LIBRARY_DIR)/libclips.so.$(CLIPS_VERSION)	       \
+	ln -sf $(SHARED_LIBRARY_DIR)/libclips.so.$(CLIPS_VERSION)		\
 	 	$(SHARED_LIBRARY_DIR)/libclips.so
 	-ldconfig -n -v $(SHARED_LIBRARY_DIR)