Introduce conditional compilation of FORTRAN code (14d259f0) · Commits · Giacomo Mulas / NP_TMcode

build/Makefile.am

+24 −7

Original line number	Diff line number	Diff line
		LDADD=libnptm/libnptm.la -L/usr/lib64 ${USER_LDFLAGS} ${HDF5_LDFLAGS} ${LAPACKLDFLAGS} ${MAGMALDFLAGS}
		lib_LTLIBRARIES=libnptm/libnptm.la
		libnptm_libnptm_la_SOURCES=../src/libnptm/algebraic.cpp ../src/libnptm/clu_subs.cpp ../src/libnptm/Commons.cpp ../src/libnptm/Configuration.cpp ../src/libnptm/file_io.cpp ../src/libnptm/lapack_calls.cpp ../src/libnptm/logging.cpp ../src/libnptm/magma_calls.cpp ../src/libnptm/Parsers.cpp ../src/libnptm/sph_subs.cpp ../src/libnptm/tfrfme.cpp ../src/libnptm/TransitionMatrix.cpp ../src/libnptm/tra_subs.cpp
		bin_PROGRAMS=cluster/edfb_clu cluster/clu cluster/np_cluster sphere/edfb_sph sphere/sph sphere/np_sphere trapping/frfme trapping/lffft trapping/np_trapping testing/test_TEDF testing/test_TTMS
		cluster_edfb_clu_SOURCES=../src/cluster/edfb_clu.f
		cluster_clu_SOURCES=../src/cluster/clu.f
		if BUILDFORTRAN
		PROGS=cluster/edfb_clu cluster/clu cluster/np_cluster sphere/edfb_sph sphere/sph sphere/np_sphere trapping/frfme trapping/lffft trapping/np_trapping testing/test_TEDF testing/test_TTMS
		EDFBCLUSOURCES=../src/cluster/edfb_clu.f
		CLUSOURCES=../src/cluster/clu.f
		EDFBSPHSOURCES=../src/sphere/edfb_sph.f
		SPHSOURCES=../src/sphere/sph.f
		FRFMESOURCES=../src/trapping/frfme.f
		LFFFTSOURCES=../src/trapping/lffft.f
		else
		PROGS=cluster/np_cluster sphere/np_sphere trapping/np_trapping testing/test_TEDF testing/test_TTMS
		EDFBCLUSOURCES=
		CLUSOURCES=
		EDFBSPHSOURCES=
		SPHSOURCES=
		FRFMESOURCES=
		LFFFTSOURCES=
		endif
		bin_PROGRAMS=$(PROGS)
		cluster_edfb_clu_SOURCES=$(EDFBCLUSOURCES)
		cluster_clu_SOURCES=$(CLUSOURCES)
		cluster_np_cluster_SOURCES=../src/cluster/np_cluster.cpp ../src/cluster/cluster.cpp
		sphere_edfb_sph_SOURCES=../src/sphere/edfb_sph.f
		sphere_sph_SOURCES=../src/sphere/sph.f
		sphere_edfb_sph_SOURCES=$(EDFBSPHSOURCES)
		sphere_sph_SOURCES=$(SPHSOURCES)
		sphere_np_sphere_SOURCES=../src/sphere/np_sphere.cpp ../src/sphere/sphere.cpp
		trapping_frfme_SOURCES=../src/trapping/frfme.f
		trapping_lffft_SOURCES=../src/trapping/lffft.f
		trapping_frfme_SOURCES=$(FRFMESOURCES)
		trapping_lffft_SOURCES=$(LFFFTSOURCES)
		trapping_np_trapping_SOURCES=../src/trapping/np_trapping.cpp ../src/trapping/cfrfme.cpp ../src/trapping/clffft.cpp
		testing_test_TEDF_SOURCES=../src/testing/test_TEDF.cpp
		testing_test_TTMS_SOURCES=../src/testing/test_TTMS.cpp

build/Makefile.in

+65 −24

Original line number	Diff line number	Diff line
		@@ -89,12 +89,7 @@ PRE_UNINSTALL = :
		POST_UNINSTALL = :
		build_triplet = @build@
		host_triplet = @host@
		bin_PROGRAMS = cluster/edfb_clu$(EXEEXT) cluster/clu$(EXEEXT) \
		cluster/np_cluster$(EXEEXT) sphere/edfb_sph$(EXEEXT) \
		sphere/sph$(EXEEXT) sphere/np_sphere$(EXEEXT) \
		trapping/frfme$(EXEEXT) trapping/lffft$(EXEEXT) \
		trapping/np_trapping$(EXEEXT) testing/test_TEDF$(EXEEXT) \
		testing/test_TTMS$(EXEEXT)
		bin_PROGRAMS = $(am__EXEEXT_1)
		subdir = .
		ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
		am__aclocal_m4_deps = $(top_srcdir)/configure.ac
		@@ -107,6 +102,22 @@ am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \
		mkinstalldirs = $(install_sh) -d
		CONFIG_CLEAN_FILES =
		CONFIG_CLEAN_VPATH_FILES =
		@BUILDFORTRAN_FALSE@am__EXEEXT_1 = cluster/np_cluster$(EXEEXT) \
		@BUILDFORTRAN_FALSE@ sphere/np_sphere$(EXEEXT) \
		@BUILDFORTRAN_FALSE@ trapping/np_trapping$(EXEEXT) \
		@BUILDFORTRAN_FALSE@ testing/test_TEDF$(EXEEXT) \
		@BUILDFORTRAN_FALSE@ testing/test_TTMS$(EXEEXT)
		@BUILDFORTRAN_TRUE@am__EXEEXT_1 = cluster/edfb_clu$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ cluster/clu$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ cluster/np_cluster$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ sphere/edfb_sph$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ sphere/sph$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ sphere/np_sphere$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ trapping/frfme$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ trapping/lffft$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ trapping/np_trapping$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ testing/test_TEDF$(EXEEXT) \
		@BUILDFORTRAN_TRUE@ testing/test_TTMS$(EXEEXT)
		am__installdirs = "$(DESTDIR)$(bindir)" "$(DESTDIR)$(libdir)"
		PROGRAMS = $(bin_PROGRAMS)
		am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" \| sed 's\|.\|.\|g'`;
		@@ -151,14 +162,18 @@ AM_V_lt = $(am__v_lt_@AM_V@)
		am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
		am__v_lt_0 = --silent
		am__v_lt_1 =
		am_cluster_clu_OBJECTS = ../src/cluster/clu.$(OBJEXT)
		am__cluster_clu_SOURCES_DIST = ../src/cluster/clu.f
		@BUILDFORTRAN_TRUE@am__objects_1 = ../src/cluster/clu.$(OBJEXT)
		am_cluster_clu_OBJECTS = $(am__objects_1)
		cluster_clu_OBJECTS = $(am_cluster_clu_OBJECTS)
		cluster_clu_LDADD = $(LDADD)
		am__DEPENDENCIES_1 =
		cluster_clu_DEPENDENCIES = libnptm/libnptm.la $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1)
		am_cluster_edfb_clu_OBJECTS = ../src/cluster/edfb_clu.$(OBJEXT)
		am__cluster_edfb_clu_SOURCES_DIST = ../src/cluster/edfb_clu.f
		@BUILDFORTRAN_TRUE@am__objects_2 = ../src/cluster/edfb_clu.$(OBJEXT)
		am_cluster_edfb_clu_OBJECTS = $(am__objects_2)
		cluster_edfb_clu_OBJECTS = $(am_cluster_edfb_clu_OBJECTS)
		cluster_edfb_clu_LDADD = $(LDADD)
		cluster_edfb_clu_DEPENDENCIES = libnptm/libnptm.la \
		@@ -171,7 +186,9 @@ cluster_np_cluster_LDADD = $(LDADD)
		cluster_np_cluster_DEPENDENCIES = libnptm/libnptm.la \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
		am_sphere_edfb_sph_OBJECTS = ../src/sphere/edfb_sph.$(OBJEXT)
		am__sphere_edfb_sph_SOURCES_DIST = ../src/sphere/edfb_sph.f
		@BUILDFORTRAN_TRUE@am__objects_3 = ../src/sphere/edfb_sph.$(OBJEXT)
		am_sphere_edfb_sph_OBJECTS = $(am__objects_3)
		sphere_edfb_sph_OBJECTS = $(am_sphere_edfb_sph_OBJECTS)
		sphere_edfb_sph_LDADD = $(LDADD)
		sphere_edfb_sph_DEPENDENCIES = libnptm/libnptm.la \
		@@ -184,7 +201,9 @@ sphere_np_sphere_LDADD = $(LDADD)
		sphere_np_sphere_DEPENDENCIES = libnptm/libnptm.la \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
		am_sphere_sph_OBJECTS = ../src/sphere/sph.$(OBJEXT)
		am__sphere_sph_SOURCES_DIST = ../src/sphere/sph.f
		@BUILDFORTRAN_TRUE@am__objects_4 = ../src/sphere/sph.$(OBJEXT)
		am_sphere_sph_OBJECTS = $(am__objects_4)
		sphere_sph_OBJECTS = $(am_sphere_sph_OBJECTS)
		sphere_sph_LDADD = $(LDADD)
		sphere_sph_DEPENDENCIES = libnptm/libnptm.la $(am__DEPENDENCIES_1) \
		@@ -202,13 +221,17 @@ testing_test_TTMS_LDADD = $(LDADD)
		testing_test_TTMS_DEPENDENCIES = libnptm/libnptm.la \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
		am_trapping_frfme_OBJECTS = ../src/trapping/frfme.$(OBJEXT)
		am__trapping_frfme_SOURCES_DIST = ../src/trapping/frfme.f
		@BUILDFORTRAN_TRUE@am__objects_5 = ../src/trapping/frfme.$(OBJEXT)
		am_trapping_frfme_OBJECTS = $(am__objects_5)
		trapping_frfme_OBJECTS = $(am_trapping_frfme_OBJECTS)
		trapping_frfme_LDADD = $(LDADD)
		trapping_frfme_DEPENDENCIES = libnptm/libnptm.la $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
		$(am__DEPENDENCIES_1)
		am_trapping_lffft_OBJECTS = ../src/trapping/lffft.$(OBJEXT)
		am__trapping_lffft_SOURCES_DIST = ../src/trapping/lffft.f
		@BUILDFORTRAN_TRUE@am__objects_6 = ../src/trapping/lffft.$(OBJEXT)
		am_trapping_lffft_OBJECTS = $(am__objects_6)
		trapping_lffft_OBJECTS = $(am_trapping_lffft_OBJECTS)
		trapping_lffft_LDADD = $(LDADD)
		trapping_lffft_DEPENDENCIES = libnptm/libnptm.la $(am__DEPENDENCIES_1) \
		@@ -318,12 +341,16 @@ SOURCES = $(libnptm_libnptm_la_SOURCES) $(cluster_clu_SOURCES) \
		$(sphere_sph_SOURCES) $(testing_test_TEDF_SOURCES) \
		$(testing_test_TTMS_SOURCES) $(trapping_frfme_SOURCES) \
		$(trapping_lffft_SOURCES) $(trapping_np_trapping_SOURCES)
		DIST_SOURCES = $(libnptm_libnptm_la_SOURCES) $(cluster_clu_SOURCES) \
		$(cluster_edfb_clu_SOURCES) $(cluster_np_cluster_SOURCES) \
		$(sphere_edfb_sph_SOURCES) $(sphere_np_sphere_SOURCES) \
		$(sphere_sph_SOURCES) $(testing_test_TEDF_SOURCES) \
		$(testing_test_TTMS_SOURCES) $(trapping_frfme_SOURCES) \
		$(trapping_lffft_SOURCES) $(trapping_np_trapping_SOURCES)
		DIST_SOURCES = $(libnptm_libnptm_la_SOURCES) \
		$(am__cluster_clu_SOURCES_DIST) \
		$(am__cluster_edfb_clu_SOURCES_DIST) \
		$(cluster_np_cluster_SOURCES) \
		$(am__sphere_edfb_sph_SOURCES_DIST) \
		$(sphere_np_sphere_SOURCES) $(am__sphere_sph_SOURCES_DIST) \
		$(testing_test_TEDF_SOURCES) $(testing_test_TTMS_SOURCES) \
		$(am__trapping_frfme_SOURCES_DIST) \
		$(am__trapping_lffft_SOURCES_DIST) \
		$(trapping_np_trapping_SOURCES)
		am__can_run_installinfo = \
		case $$AM_UPDATE_INFO_DIR in \
		n\|no\|NO) false;; \
		@@ -521,14 +548,28 @@ top_srcdir = @top_srcdir@
		LDADD = libnptm/libnptm.la -L/usr/lib64 ${USER_LDFLAGS} ${HDF5_LDFLAGS} ${LAPACKLDFLAGS} ${MAGMALDFLAGS}
		lib_LTLIBRARIES = libnptm/libnptm.la
		libnptm_libnptm_la_SOURCES = ../src/libnptm/algebraic.cpp ../src/libnptm/clu_subs.cpp ../src/libnptm/Commons.cpp ../src/libnptm/Configuration.cpp ../src/libnptm/file_io.cpp ../src/libnptm/lapack_calls.cpp ../src/libnptm/logging.cpp ../src/libnptm/magma_calls.cpp ../src/libnptm/Parsers.cpp ../src/libnptm/sph_subs.cpp ../src/libnptm/tfrfme.cpp ../src/libnptm/TransitionMatrix.cpp ../src/libnptm/tra_subs.cpp
		cluster_edfb_clu_SOURCES = ../src/cluster/edfb_clu.f
		cluster_clu_SOURCES = ../src/cluster/clu.f
		@BUILDFORTRAN_FALSE@PROGS = cluster/np_cluster sphere/np_sphere trapping/np_trapping testing/test_TEDF testing/test_TTMS
		@BUILDFORTRAN_TRUE@PROGS = cluster/edfb_clu cluster/clu cluster/np_cluster sphere/edfb_sph sphere/sph sphere/np_sphere trapping/frfme trapping/lffft trapping/np_trapping testing/test_TEDF testing/test_TTMS
		@BUILDFORTRAN_FALSE@EDFBCLUSOURCES =
		@BUILDFORTRAN_TRUE@EDFBCLUSOURCES = ../src/cluster/edfb_clu.f
		@BUILDFORTRAN_FALSE@CLUSOURCES =
		@BUILDFORTRAN_TRUE@CLUSOURCES = ../src/cluster/clu.f
		@BUILDFORTRAN_FALSE@EDFBSPHSOURCES =
		@BUILDFORTRAN_TRUE@EDFBSPHSOURCES = ../src/sphere/edfb_sph.f
		@BUILDFORTRAN_FALSE@SPHSOURCES =
		@BUILDFORTRAN_TRUE@SPHSOURCES = ../src/sphere/sph.f
		@BUILDFORTRAN_FALSE@FRFMESOURCES =
		@BUILDFORTRAN_TRUE@FRFMESOURCES = ../src/trapping/frfme.f
		@BUILDFORTRAN_FALSE@LFFFTSOURCES =
		@BUILDFORTRAN_TRUE@LFFFTSOURCES = ../src/trapping/lffft.f
		cluster_edfb_clu_SOURCES = $(EDFBCLUSOURCES)
		cluster_clu_SOURCES = $(CLUSOURCES)
		cluster_np_cluster_SOURCES = ../src/cluster/np_cluster.cpp ../src/cluster/cluster.cpp
		sphere_edfb_sph_SOURCES = ../src/sphere/edfb_sph.f
		sphere_sph_SOURCES = ../src/sphere/sph.f
		sphere_edfb_sph_SOURCES = $(EDFBSPHSOURCES)
		sphere_sph_SOURCES = $(SPHSOURCES)
		sphere_np_sphere_SOURCES = ../src/sphere/np_sphere.cpp ../src/sphere/sphere.cpp
		trapping_frfme_SOURCES = ../src/trapping/frfme.f
		trapping_lffft_SOURCES = ../src/trapping/lffft.f
		trapping_frfme_SOURCES = $(FRFMESOURCES)
		trapping_lffft_SOURCES = $(LFFFTSOURCES)
		trapping_np_trapping_SOURCES = ../src/trapping/np_trapping.cpp ../src/trapping/cfrfme.cpp ../src/trapping/clffft.cpp
		testing_test_TEDF_SOURCES = ../src/testing/test_TEDF.cpp
		testing_test_TTMS_SOURCES = ../src/testing/test_TTMS.cpp

build/configure

+63 −2

Original line number	Diff line number	Diff line
		@@ -665,6 +665,8 @@ LAPACKLDFLAGS
		LAPACKFLAGS
		OMPFLAGS
		OFFLOADFLAGS
		BUILDFORTRAN_FALSE
		BUILDFORTRAN_TRUE
		HDF5_LDFLAGS
		HDF5_LIB
		HDF5_INCLUDE
		@@ -811,6 +813,7 @@ with_aix_soname
		with_gnu_ld
		with_sysroot
		enable_libtool_lock
		enable_fortran
		enable_offload
		enable_openmp
		with_lapack
		@@ -1474,6 +1477,7 @@ Optional Features:
		--enable-fast-install[=PKGS]
		optimize for fast installation [default=yes]
		--disable-libtool-lock avoid locking (might break parallel builds)
		--enable-fortran enable legacy FORTRAN compilation [default=auto]
		--enable-offload enable target offloading (requires g++ version >=
		13) [default=auto]
		--enable-openmp enable OpneMP multi-threading [default=yes]
		@@ -9979,7 +9983,7 @@ ac_compile='$F77 -c $FFLAGS conftest.$ac_ext >&5'
		ac_link='$F77 -o conftest$ac_exeext $FFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
		ac_compiler_gnu=$ac_cv_f77_compiler_gnu
		if test -n "$ac_tool_prefix"; then
		for ac_prog in gfortran f77
		for ac_prog in $F77 gfortran f77
		do
		# Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
		set dummy $ac_tool_prefix$ac_prog; ac_word=$2
		@@ -10029,7 +10033,7 @@ fi
		fi
		if test -z "$F77"; then
		ac_ct_F77=$F77
		for ac_prog in gfortran f77
		for ac_prog in $F77 gfortran f77
		do
		# Extract the first word of "$ac_prog", so it can be a program name with args.
		set dummy $ac_prog; ac_word=$2
		@@ -24887,6 +24891,59 @@ esac
		fi

		# Configure the optional features
		# Check whether --enable-fortran was given.
		if test ${enable_fortran+y}
		then :
		enableval=$enable_fortran;
		if test "x$enableval" = "xno"; then
		export BUILDF="false"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Disabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Disabling FORTRAN compilation" >&6;}
		elif test "x$enableval" = "xyes"; then
		if test "x$F77" != "x"; then
		export BUILDF="true"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Enabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Enabling FORTRAN compilation" >&6;}
		else
		as_fn_error $? "FORTRAN was requested, but no FORTRAN compiler was found!" "$LINENO" 5
		fi
		elif test "x$enableval" = "xauto"; then
		if test "x$F77" != "x"; then
		export BUILDF="true"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Enabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Enabling FORTRAN compilation" >&6;}
		else
		export BUILDF="false"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Disabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Disabling FORTRAN compilation" >&6;}
		fi
		fi

		else case e in #(
		e)
		if test "x$F77" != "x"; then
		export BUILDF="true"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Enabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Enabling FORTRAN compilation" >&6;}
		else
		export BUILDF="false"
		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: Disabling FORTRAN compilation" >&5
		printf "%s\n" "$as_me: Disabling FORTRAN compilation" >&6;}
		fi

		;;
		esac
		fi

		if test "x$BUILDF" = "xtrue"; then
		BUILDFORTRAN_TRUE=
		BUILDFORTRAN_FALSE='#'
		else
		BUILDFORTRAN_TRUE='#'
		BUILDFORTRAN_FALSE=
		fi


		# Check whether --enable-offload was given.
		if test ${enable_offload+y}
		then :
		@@ -25495,6 +25552,10 @@ if test -z "${am__fastdepCXX_TRUE}" && test -z "${am__fastdepCXX_FALSE}"; then
		as_fn_error $? "conditional \"am__fastdepCXX\" was never defined.
		Usually this means the macro was only invoked conditionally." "$LINENO" 5
		fi
		if test -z "${BUILDFORTRAN_TRUE}" && test -z "${BUILDFORTRAN_FALSE}"; then
		as_fn_error $? "conditional \"BUILDFORTRAN\" was never defined.
		Usually this means the macro was only invoked conditionally." "$LINENO" 5
		fi

		: "${CONFIG_STATUS=./config.status}"
		ac_write_fail=0

build/configure.ac

+37 −1

Original line number	Diff line number	Diff line
		@@ -212,7 +212,7 @@ AC_ARG_ENABLE(
		]
		)
		AC_PROG_CXX([$CXX])
		AC_PROG_F77([gfortran f77])
		AC_PROG_F77([$F77 gfortran f77])
		# Check whether the compiler is clang++ (needs additional flags)
		CXX_IS_CLANG=$($CXX --version \| grep clang)
		AS_IF(
		@@ -252,6 +252,42 @@ AS_IF(
		)

		# Configure the optional features
		AC_ARG_ENABLE(
		[fortran],
		[AS_HELP_STRING([--enable-fortran], [enable legacy FORTRAN compilation [default=auto]])],
		[
		if test "x$enableval" = "xno"; then
		export BUILDF="false"
		AC_MSG_NOTICE([Disabling FORTRAN compilation])
		elif test "x$enableval" = "xyes"; then
		if test "x$F77" != "x"; then
		export BUILDF="true"
		AC_MSG_NOTICE([Enabling FORTRAN compilation])
		else
		AC_MSG_ERROR([FORTRAN was requested, but no FORTRAN compiler was found!])
		fi
		elif test "x$enableval" = "xauto"; then
		if test "x$F77" != "x"; then
		export BUILDF="true"
		AC_MSG_NOTICE([Enabling FORTRAN compilation])
		else
		export BUILDF="false"
		AC_MSG_NOTICE([Disabling FORTRAN compilation])
		fi
		fi
		],
		[
		if test "x$F77" != "x"; then
		export BUILDF="true"
		AC_MSG_NOTICE([Enabling FORTRAN compilation])
		else
		export BUILDF="false"
		AC_MSG_NOTICE([Disabling FORTRAN compilation])
		fi
		]
		)
		AM_CONDITIONAL([BUILDFORTRAN], [test "x$BUILDF" = "xtrue"])

		AC_ARG_ENABLE(
		[offload],
		[AS_HELP_STRING([--enable-offload], [enable target offloading (requires g++ version >= 13) [default=auto]])],