Set up the new Unix build. Now to do the OS X build.

build/GNUbasegcc.mk

@@ -27,6 +27,8 @@ ifneq ($(NODEBUG),1)
 	LDFLAGS += -g
 endif
 
+# Build rules.
+
 OFILES = \
 	$(subst /,_,$(CFILES)) \
 	$(subst /,_,$(CXXFILES)) \
@@ -37,10 +39,16 @@ OFILES := $(OFILES:%=$(OBJDIR)/%.o)
 
 OUT = $(OUTDIR)/$(NAME)$(SUFFIX)
 
-# TODO make the linker the C++ compiler in a C++ build if needed
+# TODO allow using LD
+# LD is defined by default so we need a way to override the default define without blocking a user define
+ifeq ($(CXXFILES),)
+	reallinker = $(CC)
+else
+	reallinker = $(CXX)
+endif
 
 $(OUT): $(OFILES) | $(OUTDIR)
-	@$(LD) -o $(OUT) $(OFILES) $(LDFLAGS)
+	@$(reallinker) -o $(OUT) $(OFILES) $(LDFLAGS)
 	@echo ====== Linked $(OUT)
 
 .SECONDEXPANSION:

unix/GNUfiles.mk

@@ -33,6 +33,14 @@ HFILES += \
 
 # TODO split into a separate file or put in GNUmakefile.libui somehow?
 
+# flags for GTK+
+CFLAGS += \
+	`pkg-config --cflags gtk+-3.0`
+CXXFLAGS += \
+	`pkg-config --cflags gtk+-3.0`
+LDFLAGS += \
+	`pkg-config --libs gtk+-3.0` -lm
+
 # flags for building a shared library
 # OS X does support -shared but it has a preferred name for this so let's use that there instead; hence this is not gcc-global
 LDFLAGS += \