config-ml.in revision 38889 
1# Configure fragment invoked in the post-target section for subdirs
2# wanting multilib support.
3#
4# It is advisable to support a few --enable/--disable options to let the
5# user select which libraries s/he really wants.
6#
7# Subdirectories wishing to use multilib should put the following lines
8# in the "post-target" section of configure.in.
9#
10# if [ "${srcdir}" = "." ] ; then
11#   if [ "${with_target_subdir}" != "." ] ; then
12#     . ${with_multisrctop}../../config-ml.in
13#   else
14#     . ${with_multisrctop}../config-ml.in
15#   fi
16# else
17#   . ${srcdir}/../config-ml.in
18# fi
19#
20# See librx/configure.in in the libg++ distribution for an example of how
21# to handle autoconf'd libraries.
22#
23# Things are complicated because 6 separate cases must be handled:
24# 2 (native, cross) x 3 (absolute-path, relative-not-dot, dot) = 6.
25#
26# srcdir=. is special.  It must handle make programs that don't handle VPATH.
27# To implement this, a symlink tree is built for each library and for each
28# multilib subdir.
29#
30# The build tree is layed out as
31#
32# ./
33#   libg++
34#   newlib
35#   m68020/
36#          libg++
37#          newlib
38#          m68881/
39#                 libg++
40#                 newlib
41#
42# The nice feature about this arrangement is that inter-library references
43# in the build tree work without having to care where you are.  Note that
44# inter-library references also work in the source tree because symlink trees
45# are built when srcdir=.
46#
47# Unfortunately, trying to access the libraries in the build tree requires
48# the user to manually choose which library to use as GCC won't be able to
49# find the right one.  This is viewed as the lesser of two evils.
50#
51# Configure variables:
52# ${with_target_subdir} = "." for native, or ${target_alias} for cross.
53# Set by top level Makefile.
54# ${with_multisrctop} = how many levels of multilibs there are in the source
55# tree.  It exists to handle the case of configuring in the source tree:
56# ${srcdir} is not constant.
57# ${with_multisubdir} = name of multilib subdirectory (eg: m68020/m68881).
58#
59# Makefile variables:
60# MULTISRCTOP = number of multilib levels in source tree (+1 if cross)
61# (FIXME: note that this is different than ${with_multisrctop}.  Check out.).
62# MULTIBUILDTOP = number of multilib levels in build tree
63# MULTIDIRS = list of multilib subdirs (eg: m68000 m68020 ...)
64# (only defined in each library's main Makefile).
65# MULTISUBDIR = installed subdirectory name with leading '/' (eg: /m68000)
66# (only defined in each multilib subdir).
67
68# FIXME: Multilib is currently disabled by default for everything other than
69# newlib.  It is up to each target to turn on multilib support for the other
70# libraries as desired.
71
72# We have to handle being invoked by both Cygnus configure and Autoconf.
73#
74# Cygnus configure incoming variables:
75# srcdir, subdir, target, arguments
76#
77# Autoconf incoming variables:
78# srcdir, target, ac_configure_args
79#
80# We *could* figure srcdir and target out, but we'd have to do work that
81# our caller has already done to figure them out and requiring these two
82# seems reasonable.
83
84if [ -n "${ac_configure_args}" ]; then
85  Makefile=${ac_file-Makefile}
86  ml_config_shell=${CONFIG_SHELL-/bin/sh}
87  ml_arguments="${ac_configure_args}"
88  ml_realsrcdir=${srcdir}
89else
90  Makefile=${Makefile-Makefile}
91  ml_config_shell=${config_shell-/bin/sh}
92  ml_arguments="${arguments}"
93  if [ -n "${subdir}" -a "${subdir}" != "." ] ; then
94    ml_realsrcdir=${srcdir}/${subdir}
95  else
96    ml_realsrcdir=${srcdir}
97  fi
98fi
99
100# Scan all the arguments and set all the ones we need.
101
102for option in ${ml_arguments}
103do
104  case $option in
105  --*) ;;
106  -*) option=-$option ;;
107  esac
108
109  case $option in
110  --*=*)
111	optarg=`echo $option | sed -e 's/^[^=]*=//'`
112	;;
113  esac
114
115  case $option in
116  --disable-*)
117	enableopt=`echo ${option} | sed 's:^--disable-:enable_:;s:-:_:g'`
118	eval $enableopt=no
119	;;
120  --enable-*)
121	case "$option" in
122	*=*)	;;
123	*)	optarg=yes ;;
124	esac
125	enableopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
126	eval $enableopt="$optarg"
127	;;
128  --norecursion | --no*)
129	ml_norecursion=yes
130	;;
131  --verbose | --v | --verb*)
132	ml_verbose=--verbose
133	;;
134  --with-*)
135	case "$option" in
136	*=*)	;;
137	*)	optarg=yes ;;
138	esac
139	withopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
140	eval $withopt="$optarg"
141	;;
142  --without-*)
143	withopt=`echo ${option} | sed 's:^--::;s:out::;s:-:_:g'`
144	eval $withopt=no
145	;;
146  esac
147done
148
149# Only do this if --enable-multilib.
150if [ "${enable_multilib}" = yes ]; then
151
152# Compute whether this is the library's top level directory
153# (ie: not a multilib subdirectory, and not a subdirectory like libg++/src).
154# ${with_multisubdir} tells us we're in the right branch, but we could be
155# in a subdir of that.
156# ??? The previous version could void this test by separating the process into
157# two files: one that only the library's toplevel configure.in ran (to
158# configure the multilib subdirs), and another that all configure.in's ran to
159# update the Makefile.  It seemed reasonable to collapse all multilib support
160# into one file, but it does leave us with having to perform this test.
161ml_toplevel_p=no
162if [ -z "${with_multisubdir}" ]; then
163  if [ "${srcdir}" = "." ]; then
164    # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
165    # ${with_target_subdir} = "." for native, otherwise target alias.
166    if [ "${with_target_subdir}" = "." ]; then
167      if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
168	ml_toplevel_p=yes
169      fi
170    else
171      if [ -f ${ml_realsrcdir}/../../config-ml.in ]; then
172	ml_toplevel_p=yes
173      fi
174    fi
175  else
176    # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
177    if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
178      ml_toplevel_p=yes
179    fi
180  fi
181fi
182
183# If this is the library's top level directory, set multidirs to the
184# multilib subdirs to support.  This lives at the top because we need
185# `multidirs' set right away.
186
187if [ "${ml_toplevel_p}" = yes ]; then
188
189multidirs=
190for i in `${CC-gcc} --print-multi-lib 2>/dev/null`; do
191  dir=`echo $i | sed -e 's/;.*$//'`
192  if [ "${dir}" = "." ]; then
193    true
194  else
195    if [ -z "${multidirs}" ]; then
196      multidirs="${dir}"
197    else
198      multidirs="${multidirs} ${dir}"
199    fi
200  fi
201done
202
203case "${target}" in
204arc-*-elf*)
205	if [ x$enable_biendian != xyes ]
206	then
207	  old_multidirs=${multidirs}
208	  multidirs=""
209	  for x in ${old_multidirs}; do
210	    case "${x}" in
211	      *be*) : ;;
212	      *) multidirs="${multidirs} ${x}" ;;
213	    esac
214	  done
215	fi
216	;;
217m68*-*-*)
218	if [ x$enable_softfloat = xno ]
219	then
220	  old_multidirs="${multidirs}"
221	  multidirs=""
222	  for x in ${old_multidirs}; do
223	    case "$x" in
224	      *soft-float* ) : ;;
225	      *) multidirs="${multidirs} ${x}" ;;
226	    esac
227	  done
228	fi
229	if [ x$enable_m68881 = xno ]
230	then
231	  old_multidirs="${multidirs}"
232	  multidirs=""
233	  for x in ${old_multidirs}; do
234	    case "$x" in
235	      *m68881* ) : ;;
236	      *) multidirs="${multidirs} ${x}" ;;
237	    esac
238	  done
239	fi
240	if [ x$enable_m68000 = xno ]
241	then
242	  old_multidirs="${multidirs}"
243	  multidirs=""
244	  for x in ${old_multidirs}; do
245	    case "$x" in
246	      *m68000* ) : ;;
247	      *) multidirs="${multidirs} ${x}" ;;
248	    esac
249	  done
250	fi
251	if [ x$enable_m68020 = xno ]
252	then
253	  old_multidirs="${multidirs}"
254	  multidirs=""
255	  for x in ${old_multidirs}; do
256	    case "$x" in
257	      *m68020* ) : ;;
258	      *) multidirs="${multidirs} ${x}" ;;
259	    esac
260	  done
261	fi
262	;;
263mips*-*-*)
264	if [ x$enable_single_float = xno ]
265	then
266	  old_multidirs="${multidirs}"
267	  multidirs=""
268	  for x in ${old_multidirs}; do
269	    case "$x" in
270	      *single* ) : ;;
271	      *) multidirs="${multidirs} ${x}" ;;
272	    esac
273	  done
274	fi
275	if [ x$enable_biendian = xno ]
276	then
277	  old_multidirs="${multidirs}"
278	  multidirs=""
279	  for x in ${old_multidirs}; do
280	    case "$x" in
281	      *el* ) : ;;
282	      *eb* ) : ;;
283	      *) multidirs="${multidirs} ${x}" ;;
284	    esac
285	  done
286	fi
287	if [ x$enable_softfloat = xno ]
288	then
289	  old_multidirs="${multidirs}"
290	  multidirs=""
291	  for x in ${old_multidirs}; do
292	    case "$x" in
293	      *soft-float* ) : ;;
294	      *) multidirs="${multidirs} ${x}" ;;
295	    esac
296	  done
297	fi
298	;;
299powerpc*-*-* | rs6000*-*-*)
300	if [ x$enable_softfloat = xno ]
301	then
302	  old_multidirs="${multidirs}"
303	  multidirs=""
304	  for x in ${old_multidirs}; do
305	    case "$x" in
306	      *soft-float* ) : ;;
307	      *) multidirs="${multidirs} ${x}" ;;
308	    esac
309	  done
310	fi
311	if [ x$enable_powercpu = xno ]
312	then
313	  old_multidirs="${multidirs}"
314	  multidirs=""
315	  for x in ${old_multidirs}; do
316	    case "$x" in
317	      power | */power | */power/* ) : ;;
318	      *) multidirs="${multidirs} ${x}" ;;
319	    esac
320	  done
321	fi
322	if [ x$enable_powerpccpu = xno ]
323	then
324	  old_multidirs="${multidirs}"
325	  multidirs=""
326	  for x in ${old_multidirs}; do
327	    case "$x" in
328	      *powerpc* ) : ;;
329	      *) multidirs="${multidirs} ${x}" ;;
330	    esac
331	  done
332	fi
333	if [ x$enable_powerpcos = xno ]
334	then
335	  old_multidirs="${multidirs}"
336	  multidirs=""
337	  for x in ${old_multidirs}; do
338	    case "$x" in
339	      *mcall-linux* | *mcall-solaris* ) : ;;
340	      *) multidirs="${multidirs} ${x}" ;;
341	    esac
342	  done
343	fi
344	if [ x$enable_biendian = xno ]
345	then
346	  old_multidirs="${multidirs}"
347	  multidirs=""
348	  for x in ${old_multidirs}; do
349	    case "$x" in
350	      *mlittle* | *mbig* ) : ;;
351	      *) multidirs="${multidirs} ${x}" ;;
352	    esac
353	  done
354	fi
355	if [ x$enable_sysv = xno ]
356	then
357	  old_multidirs="${multidirs}"
358	  multidirs=""
359	  for x in ${old_multidirs}; do
360	    case "$x" in
361	      *mcall-sysv* ) : ;;
362	      *) multidirs="${multidirs} ${x}" ;;
363	    esac
364	  done
365	fi
366	if [ x$enable_aix = xno ]
367	then
368	  old_multidirs="${multidirs}"
369	  multidirs=""
370	  for x in ${old_multidirs}; do
371	    case "$x" in
372	      *mcall-aix* ) : ;;
373	      *) multidirs="${multidirs} ${x}" ;;
374	    esac
375	  done
376	fi
377	;;
378esac
379
380# Remove extraneous blanks from multidirs.
381# Tests like `if [ -n "$multidirs" ]' require it.
382multidirs=`echo "$multidirs" | sed -e 's/^[ ][ ]*//' -e 's/[ ][ ]*$//' -e 's/[ ][ ]*/ /g'`
383
384# Add code to library's top level makefile to handle building the multilib
385# subdirs.
386
387cat > Multi.tem <<\EOF
388
389# FIXME: There should be an @-sign in front of the `if'.
390# Leave out until this is tested a bit more.
391multi-do:
392	if [ -z "$(MULTIDIRS)" ]; then \
393	  true; \
394	else \
395	  rootpre=`pwd`/; export rootpre; \
396	  srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
397	  lib=`echo $${rootpre} | sed -e 's,^.*/\([^/][^/]*\)/$$,\1,'`; \
398	  compiler="$(CC)"; \
399	  for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
400	    dir=`echo $$i | sed -e 's/;.*$$//'`; \
401	    if [ "$${dir}" = "." ]; then \
402	      true; \
403	    else \
404	      if [ -d ../$${dir}/$${lib} ]; then \
405		flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
406		if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) \
407				CFLAGS="$(CFLAGS) $${flags}" \
408				CXXFLAGS="$(CXXFLAGS) $${flags}" \
409				LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
410				LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
411				LDFLAGS="$(LDFLAGS) $${flags}" \
412				$(DO)); then \
413		  true; \
414		else \
415		  exit 1; \
416		fi; \
417	      else true; \
418	      fi; \
419	    fi; \
420	  done; \
421	fi
422
423# FIXME: There should be an @-sign in front of the `if'.
424# Leave out until this is tested a bit more.
425multi-clean:
426	if [ -z "$(MULTIDIRS)" ]; then \
427	  true; \
428	else \
429	  lib=`pwd | sed -e 's,^.*/\([^/][^/]*\)$$,\1,'`; \
430	  for dir in Makefile $(MULTIDIRS); do \
431	    if [ -f ../$${dir}/$${lib}/Makefile ]; then \
432	      if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) $(DO)); \
433	      then true; \
434	      else exit 1; \
435	      fi; \
436	    else true; \
437	    fi; \
438	  done; \
439	fi
440EOF
441
442cat ${Makefile} Multi.tem > Makefile.tem
443rm -f ${Makefile} Multi.tem
444mv Makefile.tem ${Makefile}
445
446fi # ${ml_toplevel_p} = yes
447
448if [ "${ml_verbose}" = --verbose ]; then
449  echo "Adding multilib support to Makefile in ${ml_realsrcdir}"
450  if [ "${ml_toplevel_p}" = yes ]; then
451    echo "multidirs=${multidirs}"
452  fi
453  echo "with_multisubdir=${with_multisubdir}"
454fi
455
456if [ "${srcdir}" = "." ]; then
457  if [ "${with_target_subdir}" != "." ]; then
458    ml_srcdotdot="../"
459  else
460    ml_srcdotdot=""
461  fi
462else
463  ml_srcdotdot=""
464fi
465
466if [ -z "${with_multisubdir}" ]; then
467  ml_subdir=
468  ml_builddotdot=
469  : # ml_srcdotdot= # already set
470else
471  ml_subdir="/${with_multisubdir}"
472  # The '[^/][^/]*' appears that way to work around a SunOS sed bug.
473  ml_builddotdot=`echo ${with_multisubdir} | sed -e 's:[^/][^/]*:..:g'`/
474  if [ "$srcdir" = "." ]; then
475    ml_srcdotdot=${ml_srcdotdot}${ml_builddotdot}
476  else
477    : # ml_srcdotdot= # already set
478  fi
479fi
480
481if [ "${ml_toplevel_p}" = yes ]; then
482  ml_do='$(MAKE)'
483  ml_clean='$(MAKE)'
484else
485  ml_do=true
486  ml_clean=true
487fi
488
489# TOP is used by newlib and should not be used elsewhere for this purpose.
490# MULTI{SRC,BUILD}TOP are the proper ones to use.  MULTISRCTOP is empty
491# when srcdir != builddir.  MULTIBUILDTOP is always some number of ../'s.
492# FIXME: newlib needs to be updated to use MULTI{SRC,BUILD}TOP so we can
493# delete TOP.  Newlib may wish to continue to use TOP for its own purposes
494# of course.
495# MULTIDIRS is non-empty for the cpu top level Makefile (eg: newlib/Makefile)
496# and lists the subdirectories to recurse into.
497# MULTISUBDIR is non-empty in each cpu subdirectory's Makefile
498# (eg: newlib/h8300h/Makefile) and is the installed subdirectory name with
499# a leading '/'.
500# MULTIDO is used for targets like all, install, and check where
501# $(FLAGS_TO_PASS) augmented with the subdir's compiler option is needed.
502# MULTICLEAN is used for the *clean targets.
503#
504# ??? It is possible to merge MULTIDO and MULTICLEAN into one.  They are
505# currently kept separate because we don't want the *clean targets to require
506# the existence of the compiler (which MULTIDO currently requires) and
507# therefore we'd have to record the directory options as well as names
508# (currently we just record the names and use --print-multi-lib to get the
509# options).
510
511sed -e "s:^TOP[ 	]*=[ 	]*\([./]*\)[ 	]*$:TOP = ${ml_builddotdot}\1:" \
512    -e "s:^MULTISRCTOP[ 	]*=.*$:MULTISRCTOP = ${ml_srcdotdot}:" \
513    -e "s:^MULTIBUILDTOP[ 	]*=.*$:MULTIBUILDTOP = ${ml_builddotdot}:" \
514    -e "s:^MULTIDIRS[ 	]*=.*$:MULTIDIRS = ${multidirs}:" \
515    -e "s:^MULTISUBDIR[ 	]*=.*$:MULTISUBDIR = ${ml_subdir}:" \
516    -e "s:^MULTIDO[ 	]*=.*$:MULTIDO = $ml_do:" \
517    -e "s:^MULTICLEAN[ 	]*=.*$:MULTICLEAN = $ml_clean:" \
518	${Makefile} > Makefile.tem
519rm -f ${Makefile}
520mv Makefile.tem ${Makefile}
521
522# If this is the library's top level, configure each multilib subdir.
523# This is done at the end because this is the loop that runs configure
524# in each multilib subdir and it seemed reasonable to finish updating the
525# Makefile before going on to configure the subdirs.
526
527if [ "${ml_toplevel_p}" = yes ]; then
528
529# We must freshly configure each subdirectory.  This bit of code is
530# actually partially stolen from the main configure script.  FIXME.
531
532if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
533
534  if [ "${ml_verbose}" = --verbose ]; then
535    echo "Running configure in multilib subdirs ${multidirs}"
536    echo "pwd: `pwd`"
537  fi
538
539  ml_origdir=`pwd`
540  ml_libdir=`echo $ml_origdir | sed -e 's,^.*/,,'`
541  # cd to top-level-build-dir/${with_target_subdir}
542  cd ..
543
544  for ml_dir in ${multidirs}; do
545
546    if [ "${ml_verbose}" = --verbose ]; then
547      echo "Running configure in multilib subdir ${ml_dir}"
548      echo "pwd: `pwd`"
549    fi
550
551    if [ -d ${ml_dir} ]; then true; else mkdir ${ml_dir}; fi
552    if [ -d ${ml_dir}/${ml_libdir} ]; then true; else mkdir ${ml_dir}/${ml_libdir}; fi
553
554    # Eg: if ${ml_dir} = m68000/m68881, dotdot = ../../
555    dotdot=../`echo ${ml_dir} | sed -e 's|[^/]||g' -e 's|/|../|g'`
556
557    case ${srcdir} in
558    ".")
559      echo Building symlink tree in `pwd`/${ml_dir}/${ml_libdir}
560      if [ "${with_target_subdir}" != "." ]; then
561	ml_unsubdir="../"
562      else
563	ml_unsubdir=""
564      fi
565      (cd ${ml_dir}/${ml_libdir};
566       ../${dotdot}${ml_unsubdir}symlink-tree ../${dotdot}${ml_unsubdir}${ml_libdir} "")
567      ml_newsrcdir="."
568      ml_srcdiroption=
569      multisrctop=${dotdot}
570      ;;
571    *)
572      case "${srcdir}" in
573      /*) # absolute path
574        ml_newsrcdir=${srcdir}
575        ;;
576      *) # otherwise relative
577        ml_newsrcdir=${dotdot}${srcdir}
578        ;;
579      esac
580      ml_srcdiroption="-srcdir=${ml_newsrcdir}"
581      multisrctop=
582      ;;
583    esac
584
585    case "${progname}" in
586    /*)     ml_recprog=${progname} ;;
587    *)      ml_recprog=${dotdot}${progname} ;;
588    esac
589
590    # FIXME: POPDIR=${PWD=`pwd`} doesn't work here.
591    ML_POPDIR=`pwd`
592    cd ${ml_dir}/${ml_libdir}
593
594    if [ -f ${ml_newsrcdir}/configure ]; then
595      ml_recprog=${ml_newsrcdir}/configure
596    fi
597    if eval ${ml_config_shell} ${ml_recprog} \
598	--with-multisubdir=${ml_dir} --with-multisrctop=${multisrctop} \
599	${ml_arguments} ${ml_srcdiroption} ; then
600      true
601    else
602      exit 1
603    fi
604
605    cd ${ML_POPDIR}
606
607  done
608
609  cd ${ml_origdir}
610fi
611
612fi # ${ml_toplevel_p} = yes
613fi # ${enable_multilib} = yes
614