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# -*- Mode: make -*-
# Copyright 2009 Johan Dahlin
#
# This file is free software; the author(s) gives unlimited
# permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# * Input variables:
#
# INTROSPECTION_GIRS - List of GIRS that should be generated
# INTROSPECTION_SCANNER - Command to invoke scanner, normally set by
# GOBJECT_INTROSPECTION_REQUIRE/CHECK() in introspection.m4
# INTROSPECTION_SCANNER_ARGS - Additional args to pass in to the scanner
# INTROSPECTION_COMPILER - Command to invoke compiler, normally set by
# GOBJECT_INTROSPECTION_REQUIRE/CHECK() in introspection.m4
# INTROSPECTION_COMPILER_ARGS - Additional args to pass in to the compiler
#
# * Simple tutorial
#
# Add this to configure.ac:
# -Wno-portability to AM_INIT_AUTOMAKE
# GOBJECT_INTROSPECTION_CHECK([0.6.7])
#
# Add this to Makefile.am where your library/program is built:
# include $(INTROSPECTION_MAKEFILE)
# INTROSPECTION_GIRS = YourLib-1.0.gir
# YourLib_1_0_gir_NAMESPACE = YourLib
# YourLib_1_0_gir_VERSION = 1.0
# YourLib_1_0_gir_LIBS = libyourlib.la
# YourLib_1_0_gir_FILES = $(libyourlib_1_0_SOURCES)
# girdir = $(INTROSPECTION_GIRDIR)
# dist_gir_DATA = YourLib-1.0.gir
# typelibdir = $(INTROSPECTION_TYPELIBDIR)
# typelib_DATA = YourLib-1.0.typelib
# CLEANFILES = $(dist_gir_DATA) $(typelib_DATA)
#
# Make sure the required variables are set, these should under normal
# circumstances come from introspection.m4
$(if $(INTROSPECTION_GIRS),,$(error Need to define INTROSPECTION_GIRS))
$(if $(INTROSPECTION_SCANNER),,$(error Need to define INTROSPECTION_SCANNER))
$(if $(INTROSPECTION_COMPILER),,$(error Need to define INTROSPECTION_COMPILER))
# Private functions
## Transform the gir filename to something which can reference through a variable
## without automake/make complaining, eg Gtk-2.0.gir -> Gtk_2_0_gir
_gir_name = $(subst -,_,$(subst .,_,$(1)))
# Namespace and Version is either fetched from the gir filename
# or the _NAMESPACE/_VERSION variable combo
_gir_namespace = $(or $($(_gir_name)_NAMESPACE),$(firstword $(subst -, ,$(1))))
_gir_version = $(or $($(_gir_name)_VERSION),$(lastword $(subst -, ,$(1:.gir=))))
# _PROGRAM is an optional variable which needs it's own --program argument
_gir_program = $(if $($(_gir_name)_PROGRAM),--program=$($(_gir_name)_PROGRAM))
# Variables which provides a list of things
_gir_libraries = $(foreach lib,$($(_gir_name)_LIBS),--library=$(lib))
_gir_packages = $(foreach pkg,$($(_gir_name)_PACKAGES),--pkg=$(pkg))
_gir_includes = $(foreach include,$($(_gir_name)_INCLUDES),--include=$(include))
# Reuse the LIBTOOL variable from by automake if it's set
_gir_libtool = $(if $(LIBTOOL),--libtool="$(LIBTOOL)")
#
# Creates a GIR by scanning C headers/sources
# $(1) - Name of the gir file (output)
#
# If output is Gtk-2.0.gir then you should name the variables like
# Gtk_2_0_gir_NAMESPACE, Gtk_2_0_gir_VERSION etc.
# Required variables:
# FILES - C sources and headers which should be scanned
#
# One of these variables are required:
# LIBS - Library where the symbol represented in the gir can be found
# PROGRAM - Program where the symbol represented in the gir can be found
#
# Optional variables
# NAMESPACE - Namespace of the gir, first letter capital,
# rest should be lower case, for instance: 'Gtk', 'Clutter', 'ClutterGtk'.
# If not present the namespace will be fetched from the gir filename,
# the part before the first dash. For 'Gtk-2.0', namespace will be 'Gtk'.
# VERSION - Version of the gir, if not present, will be fetched from gir
# filename, the part after the first dash. For 'Gtk-2.0', version will be '2.0'.
# LIBTOOL - Command to invoke libtool, usually set by automake
# SCANNERFLAGS - Flags to pass in to the scanner, see g-ir-scanner(1) for a list
# CFLAGS - Flags to pass in to the parser when scanning headers
# PACKAGES - list of pkg-config names which cflags are required to parse
# the headers of this gir
# INCLUDES - Gir files to include without the .gir suffix, for instance
# GLib-2.0, Gtk-2.0. This is needed for all libraries which you depend on that
# provides introspection information.
#
define introspection-scanner
# Basic sanity check, to make sure required variables are set
$(if $($(_gir_name)_FILES),,$(error Need to define $(_gir_name)_FILES))
$(if $(or $($(_gir_name)_LIBS),
$($(_gir_name)_PROGRAM)),,
$(error Need to define $(_gir_name)_LIBS or $(_gir_name)_PROGRAM))
# Only dependencies we know are actually filenames goes into _FILES, make
# sure these are built before running the scanner. Libraries and programs
# needs to be added manually.
$(1): $$($(_gir_name)_FILES) $(INTROSPECTION_PARSER)
$(INTROSPECTION_SCANNER) $(INTROSPECTION_SCANNER_ARGS) \
--namespace=$(_gir_namespace) \
--nsversion=$(_gir_version) \
$(_gir_libtool) \
$(_gir_program) \
$(_gir_libraries) \
$(_gir_packages) \
$(_gir_includes) \
$($(_gir_name)_SCANNERFLAGS) \
$($(_gir_name)_CFLAGS) \
$($(_gir_name)_FILES) \
--output $(1)
endef
$(foreach gir,$(INTROSPECTION_GIRS),$(eval $(call introspection-scanner,$(gir))))
#
# Compiles a gir into a typelib
# $(1): gir filename (input)
# $(2): typelib filename (output)
#
define introspection-compiler
$(INTROSPECTION_COMPILER) $(INTROSPECTION_COMPILER_ARGS) --includedir=. $(1) -o $(2)
endef
# Simple rule to compile a typelib.
%.typelib: %.gir $(INTROSPECTION_COMPILER)
$(call introspection-compiler,$<,$@)
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