#	$NetBSD: Makefile.gnuhost,v 1.25 2004/02/15 19:52:27 skrll Exp $
#
# Rules used when building a GNU host package.  Expects MODULE to be set.
#
# There's not a lot we can do to build reliably in the face of many
# available configuration options.  To be as low-overhead as possible,
# we follow the following scheme:
#
# * Configuration is only re-run when an autoconf source file (such as
#   "configure" or "config.sub") is changed.
#
# * "config.status" is run to rebuild Makefiles and .h files if an
#   autoconf-parsed file (such as Makefile.in) is changed.
#
# * If MKUPDATE != "no", "make install" is only run if a build has happened
#   since the last install in the current directory.

.include <bsd.own.mk>

# Disable use of pre-compiled headers on Darwin.
BUILD_OSTYPE!=  uname -s
.if ${BUILD_OSTYPE} == "Darwin"
HOST_CFLAGS+=-O2 -no-cpp-precomp
.endif

GNUHOSTDIST?=	${.CURDIR}/../../gnu/dist/${MODULE}

FIND_ARGS+=	\! \( -type d \( \
			-name 'CVS' -o \
			-name 'config' -o \
			-name 'doc' -o \
			-name 'po' -o \
			-name 'nbsd.mt' -o \
			-name 'tests*' \
		\) -prune \)

# Do this "find" only if actually building something.
.if (${USETOOLS} == "yes") && empty(.MAKEFLAGS:M-V*) && \
    (make(all) || make(realall) || (!make(clean) && !make(cleandir) && !make(obj))) && \
    !defined(_GNU_CFGSRC)

_GNU_CFGSRC!=	find ${GNUHOSTDIST} ${FIND_ARGS} \
		-type f \( -name 'config*' -o -name '*.in' \) -print
.MAKEOVERRIDES+= _GNU_CFGSRC
.endif

CONFIGURE_ENV+=	CC=${HOST_CC:Q} \
		CFLAGS=${HOST_CFLAGS:Q} \
		CPPFLAGS=${HOST_CPPFLAGS:Q} \
		CXX=${HOST_CXX:Q} \
		CXXFLAGS=${HOST_CXXFLAGS:Q} \
		INSTALL=${HOST_INSTALL_FILE:Q} \
		LDFLAGS=${HOST_LDFLAGS:Q} \
		LEX=${LEX:Q} \
		PATH="${TOOLDIR}/bin:$$PATH" \
		YACC=${YACC:Q}

CONFIGURE_ARGS+=--prefix=${TOOLDIR}

.ifndef _NOWRAPPER
# Some systems have a small ARG_MAX.  On such systems, prevent Make
# variables set on the command line from being exported in the
# environment (they will still be set in MAKEOVERRIDES).
BUILD_OSTYPE!=	uname -s
.if ${BUILD_OSTYPE} == "Darwin" || ${BUILD_OSTYPE} == "FreeBSD"
__noenvexport=	-X
.endif
MAKE_ARGS:=	${__noenvexport} -f ${.PARSEDIR}/Makefile.gnuwrap ${MAKE_ARGS}
.else
MAKE_ARGS+=	_NOWRAPPER=1
.endif

MAKE_ARGS+=	BISON=true DESTDIR= INSTALL=${HOST_INSTALL_FILE:Q}

ALL_TARGET?=	all
INSTALL_TARGET?=install

.configure_done: ${_GNU_CFGSRC} ${.CURDIR}/Makefile
	@mkdir build 2>/dev/null || true
	@(cd build && ${CONFIGURE_ENV} ${HOST_SH} ${GNUHOSTDIST}/configure ${CONFIGURE_ARGS})
	@touch $@

# The .build_done timestamp is only updated if a file actually changes
# in the build tree during "make all".  This way, if nothing has changed,
# a "make install MKUPDATE=yes" will do nothing.

.build_done: .configure_done
	@(cd build && ${MAKE} ${MAKE_ARGS} ${ALL_TARGET})
	@if [ ! -f $@ ] || [ -n "$$(find build -type f -newer .build_done -print)" ]; \
		then touch $@; fi

.install_done: ${BUILD:D.build_done}
.if ${MKUPDATE} != "no"
	@cd ${.OBJDIR}; \
	if [ ! -f .install_done ] || [ ! -f .build_done ] || \
	[ -n "$$(find .build_done -prune -newer .install_done -print)" ]; then \
		(cd build && ${MAKE} ${MAKE_ARGS} ${INSTALL_TARGET}); \
	fi
.else
	@(cd ${.OBJDIR}/build && ${MAKE} ${MAKE_ARGS} ${INSTALL_TARGET})
.endif
	@touch $@

.PHONY: .build_done .install_done

# Mapping to standard targets.

.if ${USETOOLS} == "yes"
realall: .build_done
realinstall: .install_done
.endif

clean: clean.gnu
clean.gnu:
	rm -r -f .*_done build

.include <bsd.hostprog.mk>