FreeType 2 host platform detection rules

Copyright 1996-2017 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 variousdetect.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

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_setup

std_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 (this needs python >= 2.6)." @echo "" @$(COPY) $(CONFIG_RULES) $(CONFIG_MK)

Special case for Dos, Windows, OS/2, where echo "" doesn't work correctly!

dos_setup: @type builds$(SEP)newline @echo $(PROJECT_TITLE) build system -- automatic system detection @type builds$(SEP)newline @echo The following settings are used: @type builds$(SEP)newline @echo platformÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ$(PLATFORM) @echo compilerÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ$(CC) @echo configuration directoryÿÿÿÿÿÿ$(subst /,$(SEP),$(BUILD_DIR)) @echo configuration rulesÿÿÿÿÿÿÿÿÿÿ$(subst /,$(SEP),$(CONFIG_RULES)) @type builds$(SEP)newline @echo If this does not correspond to your system or settings please remove the file @echo '$(CONFIG_MK)' from this directory then read the INSTALL file for help. @type builds$(SEP)newline @echo Otherwise, simply type 'make' again to build the library. @echo or 'make refdoc' to build the API reference (this needs python >= 2.6). @type builds$(SEP)newline @$(COPY) $(subst /,$(SEP),$(CONFIG_RULES) $(CONFIG_MK)) > nul

EOF