+# Well-known targets:
+#
+# all (default target)
+# This target builds all of ReactOS.
+#
+# module
+# These targets builds a single module. Replace module with the name of
+# the module you want to build.
+#
+# bootcd
+# This target builds an ISO (ReactOS.iso) from which ReactOS can be booted
+# and installed.
+#
+# livecd
+# This target builds an ISO (ReactOS-Live.iso) from which ReactOS can be
+# booted, but not installed.
+#
+# install
+# This target installs all of ReactOS to a location specified by the
+# ROS_INSTALL environment variable.
+#
+# module_install
+# These targets installs a single module to a location specified by the
+# ROS_INSTALL environment variable. Replace module with the name of the
+# module you want to install.
+#
+# clean
+# This target cleans (deletes) all files that are generated when building
+# ReactOS.
+#
+# module_clean
+# These targets cleans (deletes) files that are generated when building a
+# single module. Replace module with the name of the module you want to
+# clean.
+#
+# depends
+# This target does a complete dependency check of the ReactOS codebase.
+# This can require several minutes to complete. If you only need to check
+# dependencies for a single or few modules then you can use the
+# module_depends targets instead. This target can also repair a damaged or
+# missing makefile.auto if needed.
+#
+# module_depends
+# These targets do a dependency check of individual modules. Replace module
+# with the name of the module for which you want to check dependencies.
+# This is faster than the depends target which does a complete dependency
+# check of the ReactOS codebase.
+#
+#
+# Accepted environment variables:
+#
+# ROS_PREFIX
+# This variable specifies the prefix of the MinGW installation. On Windows
+# a prefix is usually not needed, but on linux it is usually "mingw32". If
+# not present and no executable named "gcc" can be found, then the prefix is
+# assumed to be "mingw32". If your gcc is named i386-mingw32-gcc then set
+# ROS_PREFIX to i386-mingw32. Don't include the dash (-) before gcc.
+#
+# ROS_INTERMEDIATE
+# This variable controls where to put intermediate files. Intermediate
+# files are generated files that are needed to generate the final
+# output files. Examples of intermediate files include *.o, *.a, and
+# *.coff. N.B. Don't put a path separator at the end. The variable
+# defaults to .\obj-i386.
+#
+# ROS_OUTPUT
+# This variable controls where to put output files. Output files are
+# generated files that makes up the result of the build process.
+# Examples of output files include *.exe, *.dll, and *.sys. N.B. Don't
+# put a path separator at the end. The variable defaults to .\output-i386.
+#
+# ROS_TEMPORARY
+# This variable controls where to put temporary files. Temporary files
+# are (usually small) generated files that are needed to generate the
+# intermediate or final output files. Examples of temporary files include
+# *.rci (preprocessed .rc files for wrc), *.tmp, and *.exp. N.B. Don't put
+# a path separator at the end. The variable defaults to the current
+# directory.
+#
+# ROS_INSTALL
+# This variable controls where to install output files to when using
+# 'make install'. N.B. Don't put a path separator at the end. The variable
+# defaults to .\reactos.
+#
+# ROS_BUILDMAP
+# This variable controls if map files are to be generated for executable
+# output files. Map files have the extension .map. The value can be either
+# full (to build map files with assembly code), yes (to build map files
+# without source code) or no (to not build any map files). The variable
+# defaults to no.
+#
+# ROS_BUILDNOSTRIP
+# This variable controls if non-symbol-stripped versions are to be built
+# of executable output files. Non-symbol-stripped executable output files
+# have .nostrip added to the filename just before the extension. The value
+# can be either yes (to build non-symbol-stripped versions of executable
+# output files) or no (to not build non-symbol-stripped versions of
+# executable output files). The variable defaults to no.
+#
+# ROS_RBUILDFLAGS
+# Pass parameters to rbuild.
+# -v Be verbose.
+# -c Clean as you go. Delete generated files as soon as they are not needed anymore.
+# -dd Disable automatic dependencies.
+# -dm{module} Check only automatic dependencies for this module.
+# -mi Let make handle creation of install directories. Rbuild will not generate the directories.
+# -ps Generate proxy makefiles in source tree instead of the output tree.
+# -ud Disable compilation units.
+# -r Input XML
+#
+# ROS_AUTOMAKE
+# Alternate name of makefile.auto
+#
+
+# check for versions of make that don't have features we need...
+# the function "eval" is only available in 3.80+, which happens to be the minimum
+# version that has the features we use...
+# THIS CHECK IS BORROWED FROM THE "GMSL" PROJECT, AND IS COVERED BY THE GPL LICENSE
+# YOU CAN FIND OUT MORE ABOUT GMSL - A VERY COOL PROJECT - AT:
+# http://gmsl.sourceforge.net/
+
+__gmsl_have_eval :=
+__gmsl_ignore := $(eval __gmsl_have_eval := T)
+
+ifndef __gmsl_have_eval
+$(error ReactOS's makefiles use GNU Make 3.80+ features, you have $(MAKE_VERSION), you MUST UPGRADE in order to build ReactOS - Sorry)
+endif
+# END of code borrowed from GMSL ( http://gmsl.sourceforge.net/ )
+
+.PHONY: all
+.PHONY: clean
+
+ifeq ($(ROS_AUTOMAKE),)
+ROS_AUTOMAKE=makefile.auto
+endif
+
+all: $(ROS_AUTOMAKE)
+
+
+.SUFFIXES:
+
+ifeq ($(HOST),)
+ifeq ($(word 1,$(shell gcc -dumpmachine)),mingw32)
+ifeq ($(findstring msys,$(shell sh --version 2>nul)),msys)
+export OSTYPE = msys
+HOST=mingw32-linux
+else
+HOST=mingw32-windows
+endif
+else
+HOST=mingw32-linux
+endif
+endif
+