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+# -*- mode: makefile-gmake -*-
+##
+## determine the HOST TARGET and SUBTARGET
+##
+
+# Determine host type
+# NOTE: HOST determination on RISC OS could fail because of missing bug fixes
+# in UnixLib which only got addressed in UnixLib 5 / GCCSDK 4.
+# When you don't have 'uname' available, you will see:
+# File 'uname' not found
+# When you do and using a 'uname' compiled with a buggy UnixLib, you
+# will see the following printed on screen:
+# RISC OS
+# In both cases HOST make variable is empty and we recover from that by
+# assuming we're building on RISC OS.
+# In case you don't see anything printed (including the warning), you
+# have an up-to-date RISC OS build system. ;-)
+HOST := $(shell uname -s)
+
+# Sanitise host
+# TODO: Ideally, we want the equivalent of s/[^A-Za-z0-9]/_/g here
+HOST := $(subst .,_,$(subst -,_,$(subst /,_,$(HOST))))
+
+ifeq ($(HOST),)
+ HOST := riscos
+ $(warning Build platform determination failed but that's a known problem for RISC OS so we're assuming a native RISC OS build.)
+else
+ ifeq ($(HOST),RISC OS)
+ # Fixup uname -s returning "RISC OS"
+ HOST := riscos
+ endif
+endif
+ifeq ($(HOST),riscos)
+ # Build happening on RO platform, default target is RO backend
+ ifeq ($(TARGET),)
+ TARGET := riscos
+ endif
+endif
+
+ifeq ($(HOST),BeOS)
+ HOST := beos
+endif
+ifeq ($(HOST),Haiku)
+ # Haiku implements the BeOS API
+ HOST := beos
+endif
+ifeq ($(HOST),beos)
+ # Build happening on BeOS platform, default target is BeOS backend
+ ifeq ($(TARGET),)
+ TARGET := beos
+ endif
+ ifeq ($(TARGET),haiku)
+ override TARGET := beos
+ endif
+endif
+
+ifeq ($(HOST),AmigaOS)
+ HOST := amiga
+ ifeq ($(TARGET),)
+ TARGET := amiga
+ endif
+endif
+
+ifeq ($(HOST),FreeMiNT)
+ HOST := mint
+endif
+ifeq ($(HOST),mint)
+ ifeq ($(TARGET),)
+ TARGET := atari
+ endif
+endif
+
+ifeq ($(findstring MINGW,$(HOST)),MINGW)
+ # MSYS' uname reports the likes of "MINGW32_NT-6.0"
+ HOST := windows
+endif
+ifeq ($(HOST),windows)
+ ifeq ($(TARGET),)
+ TARGET := windows
+ endif
+endif
+
+# Setup (sub)targets
+
+# empty default sub target
+SUBTARGET=
+
+# Default target is GTK 3 backend
+ifeq ($(TARGET),)
+ override TARGET := gtk
+ SUBTARGET = 3
+else
+ ifeq ($(TARGET),gtk)
+ # unspecified gtk is gtk3
+ SUBTARGET = 3
+ else
+ ifeq ($(TARGET),gtk3)
+ # gtk3 is gtk target with subtarget of 3
+ override TARGET := gtk
+ SUBTARGET = 3
+ else
+ ifeq ($(TARGET),gtk2)
+ # gtk2 is gtk target with subtarget of 2
+ override TARGET := gtk
+ SUBTARGET = 2
+ else
+ ifeq ($(TARGET),amigaos3)
+ override TARGET := amiga
+ SUBTARGET = os3
+ endif
+ endif
+ endif
+ endif
+endif
+
+# valid values for the TARGET
+VLDTARGET := amiga atari beos framebuffer gtk monkey riscos windows
+
+# Check for valid TARGET
+ifeq ($(filter $(VLDTARGET),$(TARGET)),)
+ $(error Unknown TARGET "$(TARGET)", Must be one of $(VLDTARGET))
+endif