From a5f51dee3f8480b7bfb309a9cd6a05c87d013858 Mon Sep 17 00:00:00 2001
From: Ricardo Salveti de Araujo <ricardo.salveti@linaro.org>
Date: Sun, 25 Mar 2012 18:58:25 -0300
Subject: Imported Upstream version 1.7.10.0.1.21 (ARMHF)

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@linaro.org>
---
 sgx/eurasiacon/build/linux2/config/core.mk | 507 +++++++++++++++++++++++++++++
 1 file changed, 507 insertions(+)
 create mode 100755 sgx/eurasiacon/build/linux2/config/core.mk

(limited to 'sgx/eurasiacon/build/linux2/config/core.mk')

diff --git a/sgx/eurasiacon/build/linux2/config/core.mk b/sgx/eurasiacon/build/linux2/config/core.mk
new file mode 100755
index 0000000..04a17a1
--- /dev/null
+++ b/sgx/eurasiacon/build/linux2/config/core.mk
@@ -0,0 +1,507 @@
+#
+# Copyright (C) Imagination Technologies Ltd. All rights reserved.
+# 
+# This program is free software; you can redistribute it and/or modify it
+# under the terms and conditions of the GNU General Public License,
+# version 2, as published by the Free Software Foundation.
+# 
+# This program is distributed in the hope it will be useful but, except 
+# as otherwise stated in writing, without any warranty; without even the 
+# implied warranty of merchantability or fitness for a particular purpose. 
+# See the GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+# 
+# The full GNU General Public License is included in this distribution in
+# the file called "COPYING".
+#
+# Contact Information:
+# Imagination Technologies Ltd. <gpl-support@imgtec.com>
+# Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK 
+# 
+#
+
+# Configuration wrapper for new build system. This file deals with
+# configuration of the build. Add to this file anything that deals
+# with switching driver options on/off and altering the defines or
+# objects the build uses.
+#
+# At the end of this file is an exhaustive list of all variables
+# that are passed between the platform/config stage and the generic
+# build. PLEASE refrain from adding more variables than necessary
+# to this stage -- almost all options can go through config.h.
+#
+
+################################# MACROS ####################################
+
+# Write out a kernel GNU make option.
+#
+define KernelConfigMake
+$$(shell echo "override $(1) := $(2)" >>$(CONFIG_KERNEL_MK).new)
+endef
+
+# Write out a GNU make option for both user & kernel
+#
+define BothConfigMake
+$$(eval $$(call KernelConfigMake,$(1),$(2)))
+endef
+
+# Conditionally write out a kernel GNU make option
+#
+define TunableKernelConfigMake
+ifneq ($$($(1)),)
+ifneq ($$($(1)),0)
+$$(eval $$(call KernelConfigMake,$(1),$$($(1))))
+endif
+else
+ifneq ($(2),)
+$$(eval $$(call KernelConfigMake,$(1),$(2)))
+endif
+endif
+endef
+
+# Conditionally write out a GNU make option for both user & kernel
+#
+define TunableBothConfigMake
+$$(eval $$(call TunableKernelConfigMake,$(1),$(2)))
+endef
+
+# Write out a kernel-only option
+#
+define KernelConfigC
+$$(shell echo "#define $(1) $(2)" >>$(CONFIG_KERNEL_H).new)
+endef
+
+# Write out an option for both user & kernel
+#
+define BothConfigC
+$$(eval $$(call KernelConfigC,$(1),$(2)))
+endef
+
+# Conditionally write out a kernel-only option
+#
+define TunableKernelConfigC
+ifneq ($$($(1)),)
+ifneq ($$($(1)),0)
+ifeq ($$($(1)),1)
+$$(eval $$(call KernelConfigC,$(1),))
+else
+$$(eval $$(call KernelConfigC,$(1),$$($(1))))
+endif
+endif
+else
+ifneq ($(2),)
+ifeq ($(2),1)
+$$(eval $$(call KernelConfigC,$(1),))
+else
+$$(eval $$(call KernelConfigC,$(1),$(2)))
+endif
+endif
+endif
+endef
+
+# Conditionally write out an option for both user & kernel
+#
+define TunableBothConfigC
+$$(eval $$(call TunableKernelConfigC,$(1),$(2)))
+endef
+
+############################### END MACROS ##################################
+
+DOS2UNIX := $(shell \
+ if [ -z `which fromdos` ]; then echo dos2unix -f -q; else echo fromdos -f -p; fi \
+)
+
+# Check we have a new enough version of GNU make.
+#
+need := 3.81
+ifeq ($(filter $(need),$(firstword $(sort $(MAKE_VERSION) $(need)))),)
+$(error A version of GNU make >= $(need) is required - this is version $(MAKE_VERSION))
+endif
+
+# Try to guess EURASIAROOT if it wasn't set. Check this location.
+#
+_GUESSED_EURASIAROOT := $(abspath ../../../..)
+ifneq ($(strip $(EURASIAROOT)),)
+# We don't want to warn about EURASIAROOT if it's empty: this might mean that
+# it's not set at all anywhere, but it could also mean that it's set like
+# "export EURASIAROOT=" or "make EURASIAROOT= sometarget". If it is set but
+# empty, we'll act as if it's unset and not warn.
+ifneq ($(strip $(EURASIAROOT)),$(_GUESSED_EURASIAROOT))
+nothing :=
+space := $(nothing) $(nothing)
+$(warning EURASIAROOT is set (via: $(origin EURASIAROOT)), but its value does not)
+$(warning match the root of this source tree, so it is being ignored)
+$(warning EURASIAROOT is set to: $(EURASIAROOT))
+$(warning $(space)The detected root is: $(_GUESSED_EURASIAROOT))
+$(warning To suppress this message, unset EURASIAROOT or set it empty)
+endif
+# else, EURASIAROOT matched the actual root of the source tree: don't warn
+endif
+override EURASIAROOT := $(_GUESSED_EURASIAROOT)
+TOP := $(EURASIAROOT)
+$(call directory-must-exist,$(TOP))
+
+include ../defs.mk
+
+# Infer PVR_BUILD_DIR from the directory configuration is launched from.
+# Check anyway that such a directory exists.
+#
+PVR_BUILD_DIR := $(notdir $(abspath .))
+$(call directory-must-exist,$(TOP)/eurasiacon/build/linux2/$(PVR_BUILD_DIR))
+
+# Output directory for configuration, object code,
+# final programs/libraries, and install/rc scripts.
+#
+BUILD	?= release
+OUT		?= $(TOP)/eurasiacon/binary2_$(PVR_BUILD_DIR)_$(BUILD)
+
+# Without a build date drm fails to load
+DATE := $(shell date +%Y-%m-%d)
+
+CONFIG_MK			:= $(OUT)/config.mk
+CONFIG_H			:= $(OUT)/config.h
+CONFIG_KERNEL_MK	:= $(OUT)/config_kernel.mk
+CONFIG_KERNEL_H		:= $(OUT)/config_kernel.h
+
+# Create the OUT directory and delete any previous intermediary files
+#
+$(shell mkdir -p $(OUT))
+$(shell \
+	for file in $(CONFIG_MK).new $(CONFIG_H).new \
+				$(CONFIG_KERNEL_MK).new $(CONFIG_KERNEL_H).new; do \
+		rm -f $$file; \
+	done)
+
+# Some targets don't need information about any modules. If we only specify
+# these targets on the make command line, set INTERNAL_CLOBBER_ONLY to
+# indicate that toplevel.mk shouldn't read any makefiles
+CLOBBER_ONLY_TARGETS := clean clobber help install
+INTERNAL_CLOBBER_ONLY :=
+ifneq ($(strip $(MAKECMDGOALS)),)
+INTERNAL_CLOBBER_ONLY := \
+$(if \
+ $(strip $(foreach _cmdgoal,$(MAKECMDGOALS),\
+          $(if $(filter $(_cmdgoal),$(CLOBBER_ONLY_TARGETS)),,x))),,true)
+endif
+
+# For a clobber-only build, we shouldn't regenerate any config files, or
+# require things like SGXCORE to be set
+ifneq ($(INTERNAL_CLOBBER_ONLY),true)
+
+-include ../config/user-defs.mk
+
+# FIXME: Backwards compatibility remaps.
+#
+ifeq ($(SUPPORT_SLC),1)
+SGX_FEATURE_SYSTEM_CACHE := 1
+endif
+ifeq ($(BYPASS_SLC),1)
+SGX_BYPASS_SYSTEM_CACHE := 1
+endif
+ifeq ($(BYPASS_DCU),1)
+SGX_BYPASS_DCU := 1
+endif
+ifneq ($(SGXCOREREV),)
+SGX_CORE_REV := $(SGXCOREREV)
+endif
+
+# Core handling
+#
+ifeq ($(SGXCORE),)
+$(error Must specify SGXCORE)
+endif
+ifeq ($(SGX_CORE_REV),)
+override USE_SGX_CORE_REV_HEAD := 1
+else ifeq ($(SGX_CORE_REV),000)
+override USE_SGX_CORE_REV_HEAD := 1
+override SGX_CORE_REV :=
+else
+override USE_SGX_CORE_REV_HEAD := 0
+endif
+
+# Enforced dependencies. Move this to an include.
+#
+ifeq ($(SUPPORT_LINUX_USING_WORKQUEUES),1)
+override PVR_LINUX_USING_WORKQUEUES := 1
+override PVR_LINUX_MISR_USING_PRIVATE_WORKQUEUE := 1
+override PVR_LINUX_TIMERS_USING_WORKQUEUES := 1
+override SYS_CUSTOM_POWERLOCK_WRAP := 1
+else ifeq ($(SUPPORT_LINUX_USING_SHARED_WORKQUEUES),1)
+override PVR_LINUX_USING_WORKQUEUES := 1
+override PVR_LINUX_MISR_USING_WORKQUEUE := 1
+override PVR_LINUX_TIMERS_USING_SHARED_WORKQUEUE := 1
+override SYS_CUSTOM_POWERLOCK_WRAP := 1
+endif
+
+ifneq ($(PDUMP),1)
+override SUPPORT_PDUMP_MULTI_PROCESS := 0
+endif
+
+ifeq ($(SUPPORT_HYBRID_PB),1)
+override SUPPORT_SHARED_PB := 1
+override SUPPORT_PERCONTEXT_PB := 1
+else ifeq ($(SUPPORT_PERCONTEXT_PB),1)
+override SUPPORT_SHARED_PB := 0
+endif
+
+ifeq ($(NO_HARDWARE),1)
+override SYS_USING_INTERRUPTS := 0
+override SUPPORT_HW_RECOVERY := 0
+override SUPPORT_ACTIVE_POWER_MANAGEMENT := 0
+endif
+
+ifeq ($(SGXCORE),535)
+PVR2D_ALT_2DHW ?= 0
+endif
+
+# Multi-core handling must be done separately to other options
+# Also do some sanity checks
+#
+ifeq ($(SGX_FEATURE_MP),1)
+ifeq ($(SGX_FEATURE_MP_CORE_COUNT),)
+ifeq ($(SGX_FEATURE_MP_CORE_COUNT_TA),)
+$(error Must specify SGX_FEATURE_MP_CORE_COUNT or both SGX_FEATURE_MP_CORE_COUNT_TA and SGX_FEATURE_MP_CORE_COUNT_3D with SGX_FEATURE_MP)
+else
+$(eval $(call BothConfigC,SGX_FEATURE_MP_CORE_COUNT_TA,$(SGX_FEATURE_MP_CORE_COUNT_TA)))
+endif
+ifeq ($(SGX_FEATURE_MP_CORE_COUNT_3D),)
+$(error Must specify SGX_FEATURE_MP_CORE_COUNT or both SGX_FEATURE_MP_CORE_COUNT_TA and SGX_FEATURE_MP_CORE_COUNT_3D with SGX_FEATURE_MP)
+else
+$(eval $(call BothConfigC,SGX_FEATURE_MP_CORE_COUNT_3D,$(SGX_FEATURE_MP_CORE_COUNT_3D)))
+endif
+else
+$(eval $(call BothConfigC,SGX_FEATURE_MP_CORE_COUNT,$(SGX_FEATURE_MP_CORE_COUNT)))
+endif
+endif
+
+# Rather than requiring the user to have to define two variables (one quoted,
+# one not), make PVRSRV_MODNAME a non-tunable and give it an overridable
+# default here.
+#
+PVRSRV_MODNAME ?= omapdrm
+
+# The user didn't set CROSS_COMPILE. There's probably nothing wrong
+# with that, but we'll let them know anyway.
+#
+ifeq ($(CROSS_COMPILE),)
+$(warning CROSS_COMPILE is not set. Target components will be built with the host compiler)
+endif
+
+# The user is trying to set one of the old SUPPORT_ options on the
+# command line or in the environment. This isn't supported any more
+# and will often break the build. The user is generally only trying
+# to remove a component from the list of targets to build, so we'll
+# point them at the new way of doing this.
+define sanity-check-support-option-origin
+ifeq ($$(filter undefined file,$$(origin $(1))),)
+$$(warning *** Setting $(1) via $$(origin $(1)) is deprecated)
+$$(error If you are trying to disable a component, use e.g. EXCLUDED_APIS="opengles1 opengl")
+endif
+endef
+$(foreach _o,SYS_CFLAGS SYS_CXXFLAGS SYS_EXE_LDFLAGS SYS_LIB_LDFLAGS SUPPORT_EWS SUPPORT_OPENGLES1 SUPPORT_OPENGLES2 SUPPORT_OPENVG SUPPORT_OPENCL SUPPORT_OPENGL SUPPORT_UNITTESTS SUPPORT_XORG,$(eval $(call sanity-check-support-option-origin,$(_o))))
+
+# Check for words in EXCLUDED_APIS that aren't understood by the
+# common/apis/*.mk files. This should be kept in sync with all the tests on
+# EXCLUDED_APIS in those files
+_excludable_apis := opencl opengl opengles1 opengles2 openvg ews unittests xorg xorg_unittests
+_unrecognised := $(strip $(filter-out $(_excludable_apis),$(EXCLUDED_APIS)))
+ifneq ($(_unrecognised),)
+$(warning *** Unrecognised entries in EXCLUDED_APIS: $(_unrecognised))
+$(warning *** EXCLUDED_APIS was set via: $(origin EXCLUDED_APIS))
+$(error Excludable APIs are: $(_excludable_apis))
+endif
+
+# Build's selected list of components
+#
+-include components.mk
+
+# PDUMP needs extra components
+#
+ifeq ($(PDUMP),1)
+ifneq ($(COMPONENTS),)
+COMPONENTS += pdump
+endif
+ifeq ($(SUPPORT_DRI_DRM),1)
+EXTRA_PVRSRVKM_COMPONENTS += dbgdrv
+else
+KERNEL_COMPONENTS += dbgdrv
+endif
+endif
+
+# If KERNELDIR is set, write it out to the config.mk, with
+# KERNEL_COMPONENTS and KERNEL_ID
+#
+ifneq ($(strip $(KERNELDIR)),)
+include ../kernel_version.mk
+$(eval $(call KernelConfigMake,KERNELDIR,$(KERNELDIR)))
+# Needed only by install script
+$(eval $(call KernelConfigMake,KERNEL_COMPONENTS,$(KERNEL_COMPONENTS)))
+$(eval $(call TunableKernelConfigMake,KERNEL_CROSS_COMPILE,))
+$(eval $(call TunableKernelConfigMake,EXTRA_PVRSRVKM_COMPONENTS,))
+$(eval $(call TunableKernelConfigMake,EXTRA_KBUILD_SOURCE,))
+endif
+
+# Ideally configured by platform Makefiles, as necessary
+#
+
+# Invariant options for Linux
+#
+$(eval $(call BothConfigC,LINUX,))
+
+$(eval $(call BothConfigC,PVR_BUILD_DIR,"\"$(PVR_BUILD_DIR)\""))
+$(eval $(call BothConfigC,PVR_BUILD_DATE,"\"$(DATE)\""))
+$(eval $(call BothConfigC,PVR_BUILD_TYPE,"\"$(BUILD)\""))
+$(eval $(call BothConfigC,PVRSRV_MODNAME,"\"$(PVRSRV_MODNAME)\""))
+$(eval $(call BothConfigMake,PVRSRV_MODNAME,$(PVRSRV_MODNAME)))
+
+$(eval $(call TunableBothConfigC,SGXCORE,))
+$(eval $(call BothConfigC,SGX$(SGXCORE),))
+$(eval $(call BothConfigC,SUPPORT_SGX$(SGXCORE),))
+
+$(eval $(call TunableBothConfigC,SUPPORT_SGX,1))
+$(eval $(call TunableBothConfigC,SGX_CORE_REV,))
+$(eval $(call TunableBothConfigC,USE_SGX_CORE_REV_HEAD,))
+
+$(eval $(call BothConfigC,TRANSFER_QUEUE,))
+$(eval $(call BothConfigC,PVR_SECURE_HANDLES,))
+
+$(eval $(call KernelConfigC,DISPLAY_CONTROLLER,$(DISPLAY_CONTROLLER)))
+
+$(eval $(call TunableKernelConfigC,FLIP_TECHNIQUE_FRAMEBUFFER,))
+$(eval $(call TunableKernelConfigC,FLIP_TECHNIQUE_OVERLAY,))
+
+$(eval $(call BothConfigMake,PVR_SYSTEM,$(PVR_SYSTEM)))
+
+
+# Build-type dependent options
+#
+$(eval $(call BothConfigMake,BUILD,$(BUILD)))
+
+ifeq ($(BUILD),debug)
+$(eval $(call BothConfigC,DEBUG,))
+$(eval $(call KernelConfigC,DEBUG_LINUX_MEMORY_ALLOCATIONS,))
+$(eval $(call KernelConfigC,DEBUG_LINUX_MEM_AREAS,))
+$(eval $(call KernelConfigC,DEBUG_LINUX_MMAP_AREAS,))
+$(eval $(call KernelConfigC,DEBUG_BRIDGE_KM,))
+$(eval $(call TunableBothConfigC,PVRSRV_USSE_EDM_STATUS_DEBUG,1))
+else ifeq ($(BUILD),release)
+$(eval $(call BothConfigC,RELEASE,))
+$(eval $(call TunableBothConfigMake,DEBUGLINK,1))
+$(eval $(call TunableBothConfigC,PVRSRV_USSE_EDM_STATUS_DEBUG,))
+else ifeq ($(BUILD),timing)
+$(eval $(call BothConfigC,TIMING,))
+$(eval $(call TunableBothConfigMake,DEBUGLINK,1))
+$(eval $(call TunableBothConfigC,PVRSRV_USSE_EDM_STATUS_DEBUG,))
+else
+$(error BUILD= must be either debug, release or timing)
+endif
+
+# User-configurable options
+#
+$(eval $(call TunableBothConfigC,SUPPORT_PERCONTEXT_PB,1))
+$(eval $(call TunableBothConfigC,SUPPORT_SHARED_PB,))
+$(eval $(call TunableBothConfigC,SUPPORT_HYBRID_PB,))
+$(eval $(call TunableBothConfigC,SUPPORT_HW_RECOVERY,1))
+$(eval $(call TunableBothConfigC,SUPPORT_ACTIVE_POWER_MANAGEMENT,1))
+$(eval $(call TunableBothConfigC,SUPPORT_SGX_HWPERF,1))
+$(eval $(call TunableBothConfigC,SUPPORT_SGX_LOW_LATENCY_SCHEDULING,1))
+$(eval $(call TunableBothConfigC,SUPPORT_MEMINFO_IDS,))
+$(eval $(call TunableBothConfigC,SUPPORT_SGX_NEW_STATUS_VALS,1))
+$(eval $(call TunableBothConfigC,SUPPORT_PDUMP_MULTI_PROCESS,))
+$(eval $(call TunableBothConfigC,SUPPORT_DBGDRV_EVENT_OBJECTS,1))
+$(eval $(call TunableBothConfigC,PVR_DBG_BREAK_ASSERT_FAIL,))
+$(eval $(call TunableBothConfigC,SGX_FEATURE_SYSTEM_CACHE,))
+$(eval $(call TunableBothConfigC,SGX_BYPASS_SYSTEM_CACHE,))
+$(eval $(call TunableBothConfigC,SGX_BYPASS_DCU,))
+$(eval $(call TunableBothConfigC,SGX_FAST_DPM_INIT,))
+$(eval $(call TunableBothConfigC,SGX_FEATURE_MP,))
+$(eval $(call TunableBothConfigC,SGX_FEATURE_MP_PLUS,))
+$(eval $(call TunableBothConfigC,FPGA,))
+$(eval $(call TunableBothConfigC,PDUMP,))
+$(eval $(call TunableBothConfigC,NO_HARDWARE,))
+$(eval $(call TunableBothConfigC,PDUMP_DEBUG_OUTFILES,))
+$(eval $(call TunableBothConfigC,PVRSRV_RESET_ON_HWTIMEOUT,))
+$(eval $(call TunableBothConfigC,SYS_USING_INTERRUPTS,1))
+$(eval $(call TunableBothConfigC,SUPPORT_EXTERNAL_SYSTEM_CACHE,))
+$(eval $(call TunableBothConfigC,PVRSRV_NEED_PVR_DPF,))
+$(eval $(call TunableBothConfigC,PVRSRV_NEED_PVR_ASSERT,))
+$(eval $(call TunableBothConfigC,PVRSRV_NEED_PVR_TRACE,))
+$(eval $(call TunableBothConfigC,SUPPORT_SECURE_33657_FIX,))
+
+$(eval $(call TunableKernelConfigC,SUPPORT_LINUX_X86_WRITECOMBINE,1))
+$(eval $(call TunableKernelConfigC,SUPPORT_LINUX_X86_PAT,1))
+$(eval $(call TunableKernelConfigC,SGX_DYNAMIC_TIMING_INFO,))
+$(eval $(call TunableKernelConfigC,SYS_SGX_ACTIVE_POWER_LATENCY_MS,))
+$(eval $(call TunableKernelConfigC,SYS_CUSTOM_POWERLOCK_WRAP,))
+$(eval $(call TunableKernelConfigC,PVR_LINUX_USING_WORKQUEUES,))
+$(eval $(call TunableKernelConfigC,PVR_LINUX_MISR_USING_WORKQUEUE,))
+$(eval $(call TunableKernelConfigC,PVR_LINUX_MISR_USING_PRIVATE_WORKQUEUE,))
+$(eval $(call TunableKernelConfigC,PVR_LINUX_TIMERS_USING_WORKQUEUES,))
+$(eval $(call TunableKernelConfigC,PVR_LINUX_TIMERS_USING_SHARED_WORKQUEUE,))
+$(eval $(call TunableKernelConfigC,LDM_PLATFORM,))
+$(eval $(call TunableKernelConfigC,PVR_LDM_PLATFORM_PRE_REGISTERED,))
+$(eval $(call TunableKernelConfigC,LDM_PCI,))
+$(eval $(call TunableKernelConfigC,PVRSRV_DUMP_MK_TRACE,))
+$(eval $(call TunableKernelConfigC,PVRSRV_DUMP_KERNEL_CCB,))
+$(eval $(call TunableKernelConfigC,HYBRID_SHARED_PB_SIZE,))
+
+
+$(eval $(call TunableBothConfigMake,LDM_PLATFORM,))
+$(eval $(call TunableBothConfigMake,LDM_PCI,))
+
+
+$(eval $(call TunableBothConfigMake,OPTIM,))
+
+$(eval $(call TunableBothConfigMake,SUPPORT_V4L2_GFX,))
+$(eval $(call TunableBothConfigMake,SUPPORT_BC_EXAMPLE,))
+
+endif # INTERNAL_CLOBBER_ONLY
+
+export INTERNAL_CLOBBER_ONLY
+export TOP
+export OUT
+
+MAKE_ETC := -Rr --no-print-directory -C $(TOP) TOP=$(TOP) \
+	        -f eurasiacon/build/linux2/toplevel.mk
+
+# This must match the default value of MAKECMDGOALS below, and the default
+# goal in toplevel.mk
+.DEFAULT_GOAL := build
+
+ifeq ($(MAKECMDGOALS),)
+MAKECMDGOALS := build
+else
+# We can't pass autogen to toplevel.mk
+MAKECMDGOALS := $(filter-out autogen,$(MAKECMDGOALS))
+endif
+
+.PHONY: autogen
+autogen:
+ifeq ($(INTERNAL_CLOBBER_ONLY),)
+	@$(MAKE) -s --no-print-directory -C $(EURASIAROOT) \
+		DOS2UNIX="$(DOS2UNIX)" \
+		-f eurasiacon/build/linux2/prepare_tree.mk
+else
+	@:
+endif
+
+# This deletes built-in suffix rules. Otherwise the submake isn't run when
+# saying e.g. "make thingy.a"
+.SUFFIXES:
+
+# Because we have a match-anything rule below, we'll run the main build when
+# we're actually trying to remake various makefiles after they're read in.
+# These rules try to prevent that
+%.mk: ;
+Makefile%: ;
+Makefile: ;
+
+.PHONY: build kbuild install
+build kbuild install: autogen
+	@$(if $(MAKECMDGOALS),$(MAKE) $(MAKE_ETC) $(MAKECMDGOALS) $(eval MAKECMDGOALS :=),:)
+
+%: autogen
+	@$(if $(MAKECMDGOALS),$(MAKE) $(MAKE_ETC) $(MAKECMDGOALS) $(eval MAKECMDGOALS :=),:)
-- 
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