## FreeType 2 host platform detection rules## Copyright 1996-2000, 2001, 2002, 2003 by# David Turner, Robert Wilhelm, and Werner Lemberg.## This file is part of the FreeType project, and may only be used, modified,# and distributed under the terms of the FreeType project license,# LICENSE.TXT.  By continuing to use, modify, or distribute this file you# indicate that you have read the license and understand and accept it# fully.# This sub-Makefile is in charge of detecting the current platform.  It sets# the following variables:##   BUILD_DIR    The configuration and system-specific directory.  Usually#                `freetype/builds/$(PLATFORM)' but can be different for#                custom builds of the library.## The following variables must be defined in system specific `detect.mk'# files:##   PLATFORM     The detected platform.  This will default to `ansi' if#                auto-detection fails.#   CONFIG_FILE  The configuration sub-makefile to use.  This usually depends#                on the compiler defined in the `CC' environment variable.#   DELETE       The shell command used to remove a given file.#   COPY         The shell command used to copy one file.#   SEP          The platform-specific directory separator.#   COMPILER_SEP The separator used in arguments of the compilation tools.#   CC           The compiler to use.## You need to set the following variable(s) before calling it:##   TOP_DIR      The top-most directory in the FreeType library source#                hierarchy.  If not defined, it will default to `.'.# Set auto-detection default to `ansi' resp. UNIX-like operating systems.#PLATFORM     := ansiDELETE       := $(RM)COPY         := cpSEP          := /BUILD_CONFIG := $(TOP_DIR)/builds# These two assignments must be delayed.BUILD_DIR    = $(BUILD_CONFIG)/$(PLATFORM)CONFIG_RULES = $(BUILD_DIR)/$(CONFIG_FILE)# We define the BACKSLASH variable to hold a single back-slash character.# This is needed because a line like##   SEP := \## does not work with GNU Make (the backslash is interpreted as a line# continuation).  While a line like##   SEP := \\## really defines $(SEP) as `\' on Unix, and `\\' on Dos and Windows!#BACKSLASH := $(strip \ )# Find all auto-detectable platforms.#PLATFORMS := $(notdir $(subst /detect.mk,,$(wildcard $(BUILD_CONFIG)/*/detect.mk))).PHONY: $(PLATFORMS) ansi# Filter out platform specified as setup target.#PLATFORM := $(firstword $(filter $(MAKECMDGOALS),$(PLATFORMS)))# If no setup target platform was specified, enable auto-detection/# default platform.#ifeq ($(PLATFORM),)  PLATFORM := ansiendif# If the user has explicitly asked for `ansi' on the command line,# disable auto-detection.#ifeq ($(findstring ansi,$(MAKECMDGOALS)),)  # Now, include all detection rule files found in the `builds/<system>'  # directories.  Note that the calling order of the various `detect.mk'  # files isn't predictable.  #  include $(wildcard $(BUILD_CONFIG)/*/detect.mk)endif# In case no detection rule file was successful, use the default.#ifndef CONFIG_FILE  CONFIG_FILE := ansi.mk  setup: std_setup  .PHONY: setupendif# The following targets are equivalent, with the exception that they use# a slightly different syntax for the `echo' command.## std_setup: defined for most (i.e. Unix-like) platforms# dos_setup: defined for Dos-ish platforms like Dos, Windows & OS/2#.PHONY: std_setup dos_setupstd_setup:	@echo ""	@echo "$(PROJECT_TITLE) build system -- automatic system detection"	@echo ""	@echo "The following settings are used:"	@echo ""	@echo "  platform                    $(PLATFORM)"	@echo "  compiler                    $(CC)"	@echo "  configuration directory     $(BUILD_DIR)"	@echo "  configuration rules         $(CONFIG_RULES)"	@echo ""	@echo "If this does not correspond to your system or settings please remove the file"	@echo "\`$(CONFIG_MK)' from this directory then read the INSTALL file for help."	@echo ""	@echo "Otherwise, simply type \`$(MAKE)' again to build the library,"	@echo "or \`$(MAKE) refdoc' to build the API reference (the latter needs python)."	@echo ""	@$(COPY) $(CONFIG_RULES) $(CONFIG_MK)# Special case for Dos, Windows, OS/2, where echo "" doesn't work correctly!#dos_setup:	@type builds\newline	@echo $(PROJECT_TITLE) build system -- automatic system detection	@type builds\newline	@echo The following settings are used:	@type builds\newline	@echo   platform