config-ml.in revision 33965 
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
204m68*-*-*)
205	if [ x$enable_softfloat = xno ]
206	then
207	  old_multidirs="${multidirs}"
208	  multidirs=""
209	  for x in ${old_multidirs}; do
210	    case "$x" in
211	      *soft-float* ) : ;;
212	      *) multidirs="${multidirs} ${x}" ;;
213	    esac
214	  done
215	fi
216	if [ x$enable_m68881 = xno ]
217	then
218	  old_multidirs="${multidirs}"
219	  multidirs=""
220	  for x in ${old_multidirs}; do
221	    case "$x" in
222	      *m68881* ) : ;;
223	      *) multidirs="${multidirs} ${x}" ;;
224	    esac
225	  done
226	fi
227	if [ x$enable_m68000 = xno ]
228	then
229	  old_multidirs="${multidirs}"
230	  multidirs=""
231	  for x in ${old_multidirs}; do
232	    case "$x" in
233	      *m68000* ) : ;;
234	      *) multidirs="${multidirs} ${x}" ;;
235	    esac
236	  done
237	fi
238	if [ x$enable_m68020 = xno ]
239	then
240	  old_multidirs="${multidirs}"
241	  multidirs=""
242	  for x in ${old_multidirs}; do
243	    case "$x" in
244	      *m68020* ) : ;;
245	      *) multidirs="${multidirs} ${x}" ;;
246	    esac
247	  done
248	fi
249	;;
250mips*-*-*)
251	if [ x$enable_single_float = xno ]
252	then
253	  old_multidirs="${multidirs}"
254	  multidirs=""
255	  for x in ${old_multidirs}; do
256	    case "$x" in
257	      *single* ) : ;;
258	      *) multidirs="${multidirs} ${x}" ;;
259	    esac
260	  done
261	fi
262	if [ x$enable_biendian = xno ]
263	then
264	  old_multidirs="${multidirs}"
265	  multidirs=""
266	  for x in ${old_multidirs}; do
267	    case "$x" in
268	      *el* ) : ;;
269	      *eb* ) : ;;
270	      *) multidirs="${multidirs} ${x}" ;;
271	    esac
272	  done
273	fi
274	if [ x$enable_softfloat = xno ]
275	then
276	  old_multidirs="${multidirs}"
277	  multidirs=""
278	  for x in ${old_multidirs}; do
279	    case "$x" in
280	      *soft-float* ) : ;;
281	      *) multidirs="${multidirs} ${x}" ;;
282	    esac
283	  done
284	fi
285	;;
286powerpc*-*-* | rs6000*-*-*)
287	if [ x$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} ${x}" ;;
295	    esac
296	  done
297	fi
298	if [ x$enable_commoncpu = xno ]
299	then
300	  old_multidirs="${multidirs}"
301	  multidirs=""
302	  for x in ${old_multidirs}; do
303	    case "$x" in
304	      *common* ) : ;;
305	      *) multidirs="${multidirs} ${x}" ;;
306	    esac
307	  done
308	fi
309	if [ x$enable_powercpu = xno ]
310	then
311	  old_multidirs="${multidirs}"
312	  multidirs=""
313	  for x in ${old_multidirs}; do
314	    case "$x" in
315	      power | */power | */power/* ) : ;;
316	      *) multidirs="${multidirs} ${x}" ;;
317	    esac
318	  done
319	fi
320	if [ x$enable_power2cpu = xno ]
321	then
322	  old_multidirs="${multidirs}"
323	  multidirs=""
324	  for x in ${old_multidirs}; do
325	    case "$x" in
326	      *power2* ) : ;;
327	      *) multidirs="${multidirs} ${x}" ;;
328	    esac
329	  done
330	fi
331	if [ x$enable_powerpccpu = xno ]
332	then
333	  old_multidirs="${multidirs}"
334	  multidirs=""
335	  for x in ${old_multidirs}; do
336	    case "$x" in
337	      *powerpc* ) : ;;
338	      *) multidirs="${multidirs} ${x}" ;;
339	    esac
340	  done
341	fi
342	if [ x$enable_601cpu = xno ]
343	then
344	  old_multidirs="${multidirs}"
345	  multidirs=""
346	  for x in ${old_multidirs}; do
347	    case "$x" in
348	      *601* ) : ;;
349	      *) multidirs="${multidirs} ${x}" ;;
350	    esac
351	  done
352	fi
353	if [ x$enable_biendian = xno ]
354	then
355	  old_multidirs="${multidirs}"
356	  multidirs=""
357	  for x in ${old_multidirs}; do
358	    case "$x" in
359	      *endian* ) : ;;
360	      *) multidirs="${multidirs} ${x}" ;;
361	    esac
362	  done
363	fi
364	if [ x$enable_relocatable = xno ]
365	then
366	  old_multidirs="${multidirs}"
367	  multidirs=""
368	  for x in ${old_multidirs}; do
369	    case "$x" in
370	      *relocatable* ) : ;;
371	      *) multidirs="${multidirs} ${x}" ;;
372	    esac
373	  done
374	fi
375	if [ x$enable_sysv = xno ]
376	then
377	  old_multidirs="${multidirs}"
378	  multidirs=""
379	  for x in ${old_multidirs}; do
380	    case "$x" in
381	      *sysv* ) : ;;
382	      *) multidirs="${multidirs} ${x}" ;;
383	    esac
384	  done
385	fi
386	if [ x$enable_aix = xno ]
387	then
388	  old_multidirs="${multidirs}"
389	  multidirs=""
390	  for x in ${old_multidirs}; do
391	    case "$x" in
392	      *aix* ) : ;;
393	      *) multidirs="${multidirs} ${x}" ;;
394	    esac
395	  done
396	fi
397	;;
398esac
399
400# Remove extraneous blanks from multidirs.
401# Tests like `if [ -n "$multidirs" ]' require it.
402multidirs=`echo "$multidirs" | sed -e 's/^[ ][ ]*//' -e 's/[ ][ ]*$//' -e 's/[ ][ ]*/ /g'`
403
404# Add code to library's top level makefile to handle building the multilib
405# subdirs.
406
407cat > Multi.tem <<\EOF
408
409# FIXME: There should be an @-sign in front of the `if'.
410# Leave out until this is tested a bit more.
411multi-do:
412	if [ -z "$(MULTIDIRS)" ]; then \
413	  true; \
414	else \
415	  rootpre=`pwd`/; export rootpre; \
416	  srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
417	  lib=`echo $${rootpre} | sed -e 's,^.*/\([^/][^/]*\)/$$,\1,'`; \
418	  compiler="$(CC)"; \
419	  for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
420	    dir=`echo $$i | sed -e 's/;.*$$//'`; \
421	    if [ "$${dir}" = "." ]; then \
422	      true; \
423	    else \
424	      if [ -d ../$${dir}/$${lib} ]; then \
425		flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
426		if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) \
427				CFLAGS="$(CFLAGS) $${flags}" \
428				CXXFLAGS="$(CXXFLAGS) $${flags}" \
429				LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
430				LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
431				$(DO)); then \
432		  true; \
433		else \
434		  exit 1; \
435		fi; \
436	      else true; \
437	      fi; \
438	    fi; \
439	  done; \
440	fi
441
442# FIXME: There should be an @-sign in front of the `if'.
443# Leave out until this is tested a bit more.
444multi-clean:
445	if [ -z "$(MULTIDIRS)" ]; then \
446	  true; \
447	else \
448	  lib=`pwd | sed -e 's,^.*/\([^/][^/]*\)$$,\1,'`; \
449	  for dir in Makefile $(MULTIDIRS); do \
450	    if [ -f ../$${dir}/$${lib}/Makefile ]; then \
451	      if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) $(DO)); \
452	      then true; \
453	      else exit 1; \
454	      fi; \
455	    else true; \
456	    fi; \
457	  done; \
458	fi
459EOF
460
461cat ${Makefile} Multi.tem > Makefile.tem
462rm -f ${Makefile} Multi.tem
463mv Makefile.tem ${Makefile}
464
465fi # ${ml_toplevel_p} = yes
466
467if [ "${ml_verbose}" = --verbose ]; then
468  echo "Adding multilib support to Makefile in ${ml_realsrcdir}"
469  if [ "${ml_toplevel_p}" = yes ]; then
470    echo "multidirs=${multidirs}"
471  fi
472  echo "with_multisubdir=${with_multisubdir}"
473fi
474
475if [ "${srcdir}" = "." ]; then
476  if [ "${with_target_subdir}" != "." ]; then
477    ml_srcdotdot="../"
478  else
479    ml_srcdotdot=""
480  fi
481else
482  ml_srcdotdot=""
483fi
484
485if [ -z "${with_multisubdir}" ]; then
486  ml_subdir=
487  ml_builddotdot=
488  : # ml_srcdotdot= # already set
489else
490  ml_subdir="/${with_multisubdir}"
491  # The '[^/][^/]*' appears that way to work around a SunOS sed bug.
492  ml_builddotdot=`echo ${with_multisubdir} | sed -e 's:[^/][^/]*:..:g'`/
493  if [ "$srcdir" = "." ]; then
494    ml_srcdotdot=${ml_srcdotdot}${ml_builddotdot}
495  else
496    : # ml_srcdotdot= # already set
497  fi
498fi
499
500if [ "${ml_toplevel_p}" = yes ]; then
501  ml_do='$(MAKE)'
502  ml_clean='$(MAKE)'
503else
504  ml_do=true
505  ml_clean=true
506fi
507
508# TOP is used by newlib and should not be used elsewhere for this purpose.
509# MULTI{SRC,BUILD}TOP are the proper ones to use.  MULTISRCTOP is empty
510# when srcdir != builddir.  MULTIBUILDTOP is always some number of ../'s.
511# FIXME: newlib needs to be updated to use MULTI{SRC,BUILD}TOP so we can
512# delete TOP.  Newlib may wish to continue to use TOP for its own purposes
513# of course.
514# MULTIDIRS is non-empty for the cpu top level Makefile (eg: newlib/Makefile)
515# and lists the subdirectories to recurse into.
516# MULTISUBDIR is non-empty in each cpu subdirectory's Makefile
517# (eg: newlib/h8300h/Makefile) and is the installed subdirectory name with
518# a leading '/'.
519# MULTIDO is used for targets like all, install, and check where
520# $(FLAGS_TO_PASS) augmented with the subdir's compiler option is needed.
521# MULTICLEAN is used for the *clean targets.
522#
523# ??? It is possible to merge MULTIDO and MULTICLEAN into one.  They are
524# currently kept separate because we don't want the *clean targets to require
525# the existence of the compiler (which MULTIDO currently requires) and
526# therefore we'd have to record the directory options as well as names
527# (currently we just record the names and use --print-multi-lib to get the
528# options).
529
530sed -e "s:^TOP[ 	]*=[ 	]*\([./]*\)[ 	]*$:TOP = ${ml_builddotdot}\1:" \
531    -e "s:^MULTISRCTOP[ 	]*=.*$:MULTISRCTOP = ${ml_srcdotdot}:" \
532    -e "s:^MULTIBUILDTOP[ 	]*=.*$:MULTIBUILDTOP = ${ml_builddotdot}:" \
533    -e "s:^MULTIDIRS[ 	]*=.*$:MULTIDIRS = ${multidirs}:" \
534    -e "s:^MULTISUBDIR[ 	]*=.*$:MULTISUBDIR = ${ml_subdir}:" \
535    -e "s:^MULTIDO[ 	]*=.*$:MULTIDO = $ml_do:" \
536    -e "s:^MULTICLEAN[ 	]*=.*$:MULTICLEAN = $ml_clean:" \
537	${Makefile} > Makefile.tem
538rm -f ${Makefile}
539mv Makefile.tem ${Makefile}
540
541# If this is the library's top level, configure each multilib subdir.
542# This is done at the end because this is the loop that runs configure
543# in each multilib subdir and it seemed reasonable to finish updating the
544# Makefile before going on to configure the subdirs.
545
546if [ "${ml_toplevel_p}" = yes ]; then
547
548# We must freshly configure each subdirectory.  This bit of code is
549# actually partially stolen from the main configure script.  FIXME.
550
551if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
552
553  if [ "${ml_verbose}" = --verbose ]; then
554    echo "Running configure in multilib subdirs ${multidirs}"
555    echo "pwd: `pwd`"
556  fi
557
558  ml_origdir=`pwd`
559  ml_libdir=`echo $ml_origdir | sed -e 's,^.*/,,'`
560  # cd to top-level-build-dir/${with_target_subdir}
561  cd ..
562
563  for ml_dir in ${multidirs}; do
564
565    if [ "${ml_verbose}" = --verbose ]; then
566      echo "Running configure in multilib subdir ${ml_dir}"
567      echo "pwd: `pwd`"
568    fi
569
570    if [ -d ${ml_dir} ]; then true; else mkdir ${ml_dir}; fi
571    if [ -d ${ml_dir}/${ml_libdir} ]; then true; else mkdir ${ml_dir}/${ml_libdir}; fi
572
573    # Eg: if ${ml_dir} = m68000/m68881, dotdot = ../../
574    dotdot=../`echo ${ml_dir} | sed -e 's|[^/]||g' -e 's|/|../|g'`
575
576    case ${srcdir} in
577    ".")
578      echo Building symlink tree in `pwd`/${ml_dir}/${ml_libdir}
579      if [ "${with_target_subdir}" != "." ]; then
580	ml_unsubdir="../"
581      else
582	ml_unsubdir=""
583      fi
584      (cd ${ml_dir}/${ml_libdir};
585       ../${dotdot}${ml_unsubdir}symlink-tree ../${dotdot}${ml_unsubdir}${ml_libdir} "")
586      ml_newsrcdir="."
587      ml_srcdiroption=
588      multisrctop=${dotdot}
589      ;;
590    *)
591      case "${srcdir}" in
592      /*) # absolute path
593        ml_newsrcdir=${srcdir}
594        ;;
595      *) # otherwise relative
596        ml_newsrcdir=${dotdot}${srcdir}
597        ;;
598      esac
599      ml_srcdiroption="-srcdir=${ml_newsrcdir}"
600      multisrctop=
601      ;;
602    esac
603
604    case "${progname}" in
605    /*)     ml_recprog=${progname} ;;
606    *)      ml_recprog=${dotdot}${progname} ;;
607    esac
608
609    # FIXME: POPDIR=${PWD=`pwd`} doesn't work here.
610    ML_POPDIR=`pwd`
611    cd ${ml_dir}/${ml_libdir}
612
613    if [ -f ${ml_newsrcdir}/configure ]; then
614      ml_recprog=${ml_newsrcdir}/configure
615    fi
616    if eval ${ml_config_shell} ${ml_recprog} \
617	--with-multisubdir=${ml_dir} --with-multisrctop=${multisrctop} \
618	${ml_arguments} ${ml_srcdiroption} ; then
619      true
620    else
621      exit 1
622    fi
623
624    cd ${ML_POPDIR}
625
626  done
627
628  cd ${ml_origdir}
629fi
630
631fi # ${ml_toplevel_p} = yes
632fi # ${enable_multilib} = yes
633