Respect CC, CFLAGS, LDFLAGS
Fix install paths
Fix parallel build
Drop DEPRECATED flags, bug #391099

--- Makefile
+++ Makefile
@@ -1,6 +1,5 @@
-CC := gcc
-CFLAGS := `pkg-config --cflags gtk+-2.0` -I. -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED
-LIBS :=`pkg-config --libs gtk+-2.0`
+CFLAGS += `pkg-config --cflags gtk+-2.0` -I.
+LIBS +=`pkg-config --libs gtk+-2.0`
 bindir ?= /usr/bin
 datadir ?= /usr/share
 enable_nls ?= 1
@@ -8,12 +7,11 @@
 .c.o:
 	$(CC) -c $(CFLAGS) $(CPPFLAGS) $<
 
-all: 
-	make gperiodic
-	make -C po/ all enable_nls=$(enable_nls)
+all: gperiodic
+	$(MAKE) -C po/ all enable_nls=$(enable_nls)
 
 gperiodic: gperiodic.o
-	$(CC) $(CFLAGS) -o gperiodic gperiodic.o $(LIBS)
+	$(CC) $(LDFLAGS) $(CFLAGS) -o gperiodic gperiodic.o $(LIBS)
 ifeq ($(strip),1)
 	strip gperiodic
 endif
@@ -23,24 +21,21 @@
 gperiodic.o: gperiodic.c gperiodic.h table_data.h
 
 install:
-	mkdir -p $(DESTDIR)$(bindir)
-	install -m 755 gperiodic $(DESTDIR)$(bindir)
-	mkdir -p $(DESTDIR)$(datadir)/applications
-	install -m 644 gperiodic.desktop $(DESTDIR)$(datadir)/applications
-	mkdir -p $(DESTDIR)$(datadir)/pixmaps
-	install -m 644 gperiodic.png $(DESTDIR)$(datadir)/pixmaps
-	install -m 644 gperiodic-crystal.png $(DESTDIR)$(datadir)/pixmaps
-	make -C po/ install enable_nls=$(enable_nls) datadir=$(datadir) DESTDIR=$(DESTDIR)
+	install -D -m 755 gperiodic $(DESTDIR)$(bindir)/gperiodic
+	install -D -m 644 gperiodic.desktop $(DESTDIR)$(datadir)/applications/gperiodic.desktop
+	install -D -m 644 gperiodic.png $(DESTDIR)$(datadir)/pixmaps/gperiodic.png
+	install -m 644 gperiodic-crystal.png $(DESTDIR)$(datadir)/pixmaps/gperiodic-crystal.png
+	$(MAKE) -C po/ install enable_nls=$(enable_nls) datadir=$(datadir) DESTDIR=$(DESTDIR)
 
 uninstall:
 	rm -f $(bindir)/gperiodic \
 	      $(datadir)/applications/gperiodic.desktop
 	      $(datadir)/pixmaps/gperiodic.png \
 	      $(datadir)/pixmaps/gperiodic-crystal.png
-	make -C po/ uninstall enable_nls=$(enable_nls) datadir=$(datadir) DESTDIR=$(DESTDIR)
+	$(MAKE) -C po/ uninstall enable_nls=$(enable_nls) datadir=$(datadir) DESTDIR=$(DESTDIR)
 
 clean:
 	rm -f *.o gperiodic
-	make -C po/ clean
+	$(MAKE) -C po/ clean
 
 .PHONY: install uninstall clean