#
# FreeType 2 host platform detection rules
#
# Copyright (C) 1996-2020 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
# `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 := ansi
DELETE := $(RM)
COPY := cp
CAT := cat
SEP := /
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 ($(PLATFORM),)
PLATFORM := ansi
endif
# If the user has explicitly asked for `ansi' on the command line,
# disable auto-detection.
#
ifeq ($(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: setup
endif
# Flash out and copy rules.
#
.PHONY: std_setup
std_setup:
$(info )
$(info $(PROJECT_TITLE) build system -- automatic system detection)
$(info )
$(info The following settings are used:)
$(info )
$(info $(empty) platform $(PLATFORM))
$(info $(empty) compiler $(CC))
$(info $(empty) configuration directory $(subst /,$(SEP),$(BUILD_DIR)))
$(info $(empty) configuration rules $(subst /,$(SEP),$(CONFIG_RULES)))
$(info )
$(info If this does not correspond to your system or settings please remove the file)
$(info `$(CONFIG_MK)' from this directory then read the INSTALL file for help.)
$(info )
$(info Otherwise, simply type `$(MAKE)' again to build the library,)
$(info or `$(MAKE) refdoc' to build the API reference (this needs python >= 2.6).)
$(info )
@$(COPY) $(subst /,$(SEP),$(CONFIG_RULES) $(CONFIG_MK))
# EOF
