summaryrefslogtreecommitdiff
path: root/mk/target.mk
blob: e34948933d4187728772e1fbb4222a25ff5c28c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
#################################################################################
#
#			target.mk
#
#		Standard targets for GHC
#
#################################################################################

#
# This file contain three groups of target rules:
#
# 1.  GHC targets
#	depend*
#	runtests*
#
# 2.  GNU standard targets
#	all*
#	install* installcheck installdirs
#       install-docs*
#	clean* distclean* mostlyclean* maintainer-clean*
#	tags*
#	dvi ps (no info) GHC adds: pdf rtf html chm HxS
#	check
#
# 3. Some of the above targets have a version that
#    recursively invokes that target in sub-directories.
#    This relies on the importing Makefile setting SUBDIRS
#
#    The recursive targets are marked with a * above
#

# 
# 
#

##################################################################
# Pre-compute the list of sources so we don't have to do this 
# multiple times.  See paths.mk.

PRE_SRCS := $(ALL_SRCS)

##################################################################
# Include package building machinery
# NB. needs to be after PRE_SRCS setting above, because otherwise the
# rule dependencies won't be set correctly.

include $(TOP)/mk/package.mk

###################################################################
# Suffix rules for Haskell, C and literate 

include $(TOP)/mk/suffix.mk

##################################################################
# 		GHC standard targets
#
# depend:
#
#  The depend target has to cope with a set of files that may have
#  different ways of computing their dependencies, i.e., a Haskell
#  module's dependencies are computed differently from C files.
#
# Note that we don't compute dependencies automatically, i.e., have the
# .depend file be a target that is dependent on the Haskell+C sources,
# and then have the `depend' target depend on `.depend'. The reason for
# this is that when GNU make is processing the `include .depend' statement
# it records .depend as being a Makefile. Before doing any other processing,
# `make' will try to check to see if the Makefiles are up-to-date. And,
# surprisingly enough, .depend has a rule for it, so if any of the source
# files change, it will be invoked, *regardless* of what target you're making.
#
# So, for now, the dependencies has to be re-computed manually via `make depend'
# whenever a module changes its set of imports. Doing what was outlined above
# is only a small optimisation anyway, it would avoid the recomputation of
# dependencies if the .depend file was newer than any of the source modules.
#
.PHONY: depend

# Compiler produced files that are targets of the source's imports.
MKDEPENDHS_OBJ_SUFFICES=o

ifneq "$(BootingFromHc)" "YES"
PKGCONF_DEP = $(STAMP_PKG_CONF)
endif

depend :: $(MKDEPENDHS_SRCS) $(MKDEPENDC_SRCS) $(PKGCONF_DEP)
	@$(RM) .depend
	@touch .depend
ifneq "$(DOC_SRCS)" ""
	$(MKDEPENDLIT) -o .depend $(MKDEPENDLIT_OPTS) $(filter %.lit,$(DOC_SRCS))
endif
ifneq "$(MKDEPENDC_SRCS)" ""
	$(MKDEPENDC) -f .depend $(MKDEPENDC_OPTS) $(foreach way,$(WAYS),-s $(way)) -- $(CC_OPTS) -- $(MKDEPENDC_SRCS) 
endif
ifneq "$(MKDEPENDHS_SRCS)" ""
	$(MKDEPENDHS) -M -optdep-f -optdep.depend $(foreach way,$(WAYS),-optdep-s -optdep$(way)) $(foreach obj,$(MKDEPENDHS_OBJ_SUFFICES),-osuf $(obj)) $(MKDEPENDHS_OPTS) $(filter-out -split-objs, $(HC_OPTS)) $(MKDEPENDHS_SRCS)
endif


##################################################################
# 			boot
#
#  The boot target, at a minimum generates dependency information

.PHONY: boot

ifeq "$(NO_BOOT_TARGET)" "YES"
boot ::
else
boot :: depend
endif

##################################################################
# 		GNU Standard targets
#
#	Every Makefile should define the following targets
# 
# `all'
#      Compile the entire program. This should be the default target.
#      This target need not rebuild any documentation files
# 
# `install'
#      Compile the program and copy the executables, libraries, and so on
#      to the file names where they should reside for actual use. If
#      there is a simple test to verify that a program is properly
#      installed, this target should run that test.
# 
#      The commands should create all the directories in which files are
#      to be installed, if they don't already exist. This includes the
#      directories specified as the values of the variables prefix and
#      exec_prefix , as well as all subdirectories that are needed. One
#      way to do this is by means of an installdirs target as described
#      below.
# 
#      Use `-' before any command for installing a man page, so that make
#      will ignore any errors.  This is in case there are systems that
#      don't have the Unix man page documentation system installed.
# 
# `clean'
# 
#      Delete all files from the current directory that are normally
#      created by building the program.  Don't delete the files that
#      record the configuration. Also preserve files that could be made
#      by building, but normally aren't because the distribution comes
#      with them.
# 
#      Delete `.dvi' files here if they are not part of the
#      distribution.
# 
# `distclean'
#      Delete all files from the current directory that are created by
#      configuring or building the program. If you have unpacked the
#      source and built the program without creating any other files,
#      `make distclean' should leave only the files that were in the
#      distribution.
# 
# `mostlyclean'
#      Like `clean', but may refrain from deleting a few files that
#      people normally don't want to recompile. For example, the
#      `mostlyclean' target for GCC does not delete `libgcc.a', because
#      recompiling it is rarely necessary and takes a lot of time.
# 
# `maintainer-clean'
#      Delete everything from the current directory that can be
#      reconstructed with this Makefile.  This typically includes
#      everything deleted by distclean , plus more: C source files
#      produced by Bison, tags tables, and so on.
# 
#      One exception, however: `make maintainer-clean' should not delete
#      `configure' even if `configure' can be remade using a rule in the
#      Makefile. More generally, `make maintainer-clean' should not delete
#      anything that needs to exist in order to run `configure' and then
#      begin to build the program.
# 
# `TAGS'
#      Update a tags table for this program.
# 
# `dvi' `ps' `pdf' `html' `chm' `HxS' `rtf' 
#      Generate DVI/PS/PDF files for LaTeX/DocBook docs. Not everything is
#      supported everywhere, but the intention is to standardise on DocBook
#      producing all formats.
#
# `check'
#      Perform self-tests (if any). The user must build the program
#      before running the tests, but need not install the program; you
#      should write the self-tests so that they work when the program is
#      built but not installed.
# 
# The following targets are suggested as conventional names, for programs
# in which they are useful.
# 
# installcheck
#      Perform installation tests (if any). The user must build and
#      install the program before running the tests. You should not
#      assume that `$(bindir)' is in the search path.
# 
# installdirs
#      It's useful to add a target named `installdirs' to create the
#      directories where files are installed, and their parent
#      directories. There is a script called `mkinstalldirs' which is
#      convenient for this; find it in the Texinfo package.
#      (GHC: we use a close relative of the suggested script, situated
#       in glafp-utils/mkdirhier -- SOF)




###########################################
#
#	Targets: "all"
#
###########################################

# For each of these variables that is defined
# we generate one "all" rule and one rule for the variable itself:
#
#	HS_PROG		Haskell program
#	C_PROG		C program
#	LIBRARY		Library
#
# For details of exactly what rule is generated, see the
# relevant section below

.PHONY: all

#----------------------------------------
#	Haskell programs

ifneq "$(HS_PROG)" ""
all :: $(HS_PROG)

ifneq "$(BootingFromHc)" "YES"
$(HS_PROG) :: $(OBJS)
	$(HC) -o $@ $(HC_OPTS) $(LD_OPTS) $(OBJS)
else
# see bootstrap.mk
$(HS_PROG) :: $(OBJS)
	$(CC) -o $@ $(HC_BOOT_CC_OPTS) $(HC_BOOT_LD_OPTS) $(OBJS) $(HC_BOOT_LIBS)
endif
endif

#----------------------------------------
#	C programs

ifneq "$(C_PROG)" ""
all :: $(C_PROG)

$(C_PROG) :: $(C_OBJS)
	$(CC) -o $@ $(CC_OPTS) $(LD_OPTS) $(C_OBJS) $(LIBS)
endif

#----------------------------------------
#	Libraries/archives
#
# Build $(LIBRARY) from $(LIBOBJS)+$(STUBOBJS)
#
# Inputs:
#   $(LIBOBJS)
#   $(STUBOBJS)
#
# Outputs:
#   Rule to build $(LIBRARY)

ifneq "$(LIBRARY)" ""
all :: $(LIBRARY)

ifneq "$(way)" "i"
define BUILD_STATIC_LIB
$(RM) $@
$(AR) $(AR_OPTS) $@ $(STUBOBJS) $(LIBOBJS)
$(RANLIB) $@
endef
else
define BUILD_STATIC_LIB
$(RM) $@
al -out:$@ $(STUBOBJS) $(LIBOBJS)
endef
endif

#
# For Haskell object files, we might have chosen to split
# up the object files. Test for whether the library being
# built is consisting of Haskell files by (hackily) checking
# whether HS_SRCS is empty or not.
#

# can't split objs in way 'u', so we disable it here
ifeq "$(way)" "u"
SplitObjs = NO
endif

ifneq "$(HS_SRCS)" ""
ifeq "$(SplitObjs)" "YES"

SRC_HC_OPTS += -split-objs

# We generate the archive into a temporary file libfoo.a.tmp, then
# rename it at the end.  This avoids the problem that ar may sometimes
# fail, leaving a partially built archive behind.
ifeq "$(ArSupportsInput)" ""
define BUILD_STATIC_LIB
$(RM) $@ $@.tmp
(echo $(STUBOBJS) $(C_OBJS) $(GC_C_OBJS); $(FIND) $(patsubst %.$(way_)o,%_split,$(HS_OBJS)) -name '*.$(way_)o' -print) | xargs $(AR) $@
$(RANLIB) $@
endef
else
define BUILD_STATIC_LIB
$(RM) $@ $@.tmp
echo $(STUBOBJS) > $@.list
echo $(C_OBJS) >> $@.list
echo $(GC_C_OBJS) >> $@.list
$(FIND) $(patsubst %.$(way_)o,%_split,$(HS_OBJS)) -name '*.$(way_)o' -print >> $@.list
$(AR) $(AR_OPTS) $@ $(ArSupportsInput) $@.list
$(RM) $@.list
$(RANLIB) $@
endef
endif

# Extra stuff for compiling Haskell files with $(SplitObjs):

#
# If (Haskell) object files are split, cleaning up 
# consist of descending into the directories where
# the myriads of object files have been put.
#

extraclean ::
	$(FIND) $(patsubst %.$(way_)o,%_split,$(HS_OBJS)) -name '*.$(way_)o' -print -o -name ld.script -print | xargs $(RM) __rm_food
	-rmdir $(patsubst %.$(way_)o,%_split,$(HS_OBJS)) > /dev/null 2>&1

endif # $(SplitObjs)
endif # $(HS_SRCS)

#
# Remove local symbols from library objects if requested.
#

ifeq "$(StripLibraries)" "YES"
ifeq "$(SplitObjs)" "YES"
SRC_HC_POST_OPTS += \
  for i in $(basename $@)_split/*.$(way_)o; do \
	$(LD) -r $(LD_X) -o $$i.tmp $$i; \
	$(MV) $$i.tmp $$i; \
  done
else
SRC_HC_POST_OPTS += \
  $(LD) -r $(LD_X) -o $@.tmp $@; $(MV) $@.tmp $@
endif # SplitObjs
endif # StripLibraries

# Note: $(STUBOBJS) isn't depended on here, but included when building the lib.
#       (i.e., the assumption is that $(STUBOBJS) are created as a side-effect
#       of building $(LIBOBJS)).

ifeq "$(LIBRARY:%.so=YES)" "YES"
# ELF styled DSO
$(LIBRARY): $(LIBOBJS) $(LIB_DEPS)
	$(RM) $@
	$(HC) -shared -dynamic -o $@ $(STUBOBJS) $(LIBOBJS) $(LIB_LD_OPTS)
else
ifeq "$(LIBRARY:%.dylib=YES)" "YES"
$(LIBRARY): $(LIBOBJS) $(LIB_DEPS)
	$(HC) -shared -dynamic -o $@ $(STUBOBJS) $(LIBOBJS) $(LIB_LD_OPTS)
else
ifeq "$(LIBRARY:%.dll=YES)" "YES"
#----------------------------------------
#	Building Win32 DLLs
#
$(LIBRARY): $(LIBOBJS) $(LIBRARY).o $(LIB_DEPS)
	$(HC) -shared -dynamic -o $@ $(STUBOBJS) $(LIBOBJS) $(LIBRARY).o $(LIB_LD_OPTS)

DLLTOOL=dlltool

$(LIBRARY).def: $(LIBOBJS)
	$(DLLTOOL) -D $(LIBRARY) --output-def $@ --export-all $(LIBOBJS)

$(LIBRARY).o:
	$(DLLTOOL) -D $(LIBRARY) --output-exp $(LIBRARY).o $(LIBOBJS)

# Generates library.dll.a; by MinGW conventions, this is the dll's import library
$(LIBRARY).a: $(LIBOBJS) $(LIBRARY).def
	$(DLLTOOL) -D $(LIBRARY) --def $(LIBRARY).def --output-lib $@

#
# Version information is baked into a DLL by having the DLL include DllVersionInfo.o.
# The version info contains two user tweakables: DLL_VERSION and DLL_VERSION_NAME.
# (both are given sensible defaults though.)
#
# Note: this will not work as expected with Cygwin B20.1; you need a more recent
#       version of binutils (to pick up windres bugfixes.)

ifndef DLL_VERSION
DLL_VERSION=$(ProjectVersion)
endif

ifndef DLL_VERSION_NAME
DLL_VERSION_NAME="http://www.haskell.org/ghc"
endif

ifndef DLL_DESCRIPTION
DLL_DESCRIPTION="A GHC-compiled DLL"
endif

ifndef EXE_VERSION
EXE_VERSION=$(ProjectVersion)
endif

ifndef EXE_VERSION_NAME
EXE_VERSION_NAME="http://www.haskell.org/ghc"
endif

ifndef EXE_DESCRIPTION
EXE_DESCRIPTION="A GHC-compiled binary"
endif

#
# Little bit of lo-fi mangling to get at the right set of settings depending
# on whether we're generating the VERSIONINFO for a DLL or EXE
# 
DLL_OR_EXE=$(subst VersionInfo.$(way_)rc,,$@)
VERSION_FT=$(subst Dll, 0x2L, $(subst Exe, 0x1L, $(DLL_OR_EXE)))
VERSION_RES_NAME=$(subst Exe,$(EXE_VERSION_NAME), $(subst Dll, $(DLL_VERSION_NAME),$(DLL_OR_EXE)))
VERSION_RES=$(subst Exe,$(EXE_VERSION), $(subst Dll, $(DLL_VERSION),$(DLL_OR_EXE)))
VERSION_DESC=$(subst Exe,$(EXE_DESCRIPTION), $(subst Dll, $(DLL_DESCRIPTION),$(DLL_OR_EXE)))

DllVersionInfo.$(way_)rc ExeVersionInfo.$(way_)rc:
	$(RM) DllVersionInfo.$(way_)rc
	echo "1 VERSIONINFO"  		    > $@
	echo "FILEVERSION 1,0,0,1"         >> $@
	echo "PRODUCTVERSION 1,0,0,1"      >> $@
	echo "FILEFLAGSMASK 0x3fL"         >> $@
	echo "FILEOS 0x4L"                 >> $@
	echo "FILETYPE $(VERSION_FT)"      >> $@
	echo "FILESUBTYPE 0x0L"            >> $@
	echo "BEGIN"                       >> $@
	echo " BLOCK \"StringFileInfo\""   >> $@
	echo " BEGIN"                      >> $@
	echo "  BLOCK \"040904B0\""        >> $@
	echo "  BEGIN"                     >> $@
	echo "   VALUE \"CompanyName\", \"$(VERSION_RES_NAME)\\0\"" >> $@
	echo "   VALUE \"FileVersion\", \"$(VERSION_RES)\\0\"" >> $@
	echo "   VALUE \"ProductVersion\", \"$(VERSION_RES)\\0\"" >> $@
	echo "   VALUE \"FileDescription\", \"$(VERSION_DESC)\\0\"" >> $@
	echo "  END" >> $@
	echo " END" >> $@
	echo " BLOCK \"VarFileInfo\""  >> $@
	echo " BEGIN" >> $@
	echo "  VALUE \"Translation\", 0x0409, 1200" >> $@
	echo " END" >> $@
	echo "END" >> $@
else
# Regular static library
$(LIBRARY): $(LIBOBJS)
	$(BUILD_STATIC_LIB)
endif # %.dll
endif # %.dylib
endif # %.so
endif # LIBRARY = ""

include $(TOP)/mk/install.mk

##############################################################################
#
#	Targets: check tags show
#
##############################################################################

#------------------------------------------------------------
# 			Check

.PHONY: check

check:: $(TESTS)
	@for i in $(filter-out %.lhs .hs, $(TESTS)) ''; do	\
	  if (test -f "$$i"); then 		\
	    echo Running: `basename $$i` ;	\
	    cd test; `basename $$i` ;		\
	  fi;					\
	done;

#------------------------------------------------------------
# 			Tags

.PHONY: TAGS tags

tags TAGS:: $(TAGS_HS_SRCS) $(TAGS_C_SRCS)
	@$(RM) TAGS
	@touch TAGS
ifneq "$(TAGS_HS_SRCS)" ""
	$(HSTAGS) $(HSTAGS_OPTS) $(TAGS_HS_SRCS)
endif
ifneq "$(TAGS_C_SRCS)" ""
	etags -a $(TAGS_C_SRCS)
endif
	@( DEREFFED=`ls -l Makefile | sed -e 's/.*-> \(.*\)/\1/g'` && $(RM) `dirname $$DEREFFED`/TAGS && $(CP) TAGS `dirname $$DEREFFED` ) 2>/dev/null || echo TAGS file generated, perhaps copy over to source tree?

#------------------------------------------------------------
# 			Makefile debugging
# to see the effective value used for a Makefile variable, do
#  make show VALUE=MY_VALUE
#

show:
	@echo '$(VALUE)="$($(VALUE))"'

################################################################################
#
#			DocBook XML Documentation
#
################################################################################

.PHONY: html html-no-chunks chm HxS fo dvi ps pdf

ifneq "$(XML_DOC)" ""

all :: $(XMLDocWays)

# multi-file XML document: main document name is specified in $(XML_DOC),
# sub-documents (.xml files) listed in $(XML_SRCS).

ifeq "$(XML_SRCS)" ""
XML_SRCS = $(wildcard *.xml)
endif

XML_HTML           = $(addsuffix /index.html,$(basename $(XML_DOC)))
XML_HTML_NO_CHUNKS = $(addsuffix .html,$(XML_DOC))
XML_CHM            = $(addsuffix .chm,$(XML_DOC))
XML_HxS            = $(addsuffix .HxS,$(XML_DOC))
XML_FO             = $(addsuffix .fo,$(XML_DOC))
XML_DVI            = $(addsuffix .dvi,$(XML_DOC))
XML_PS             = $(addsuffix .ps,$(XML_DOC))
XML_PDF            = $(addsuffix .pdf,$(XML_DOC))

$(XML_HTML) $(XML_NO_CHUNKS_HTML) $(XML_FO) $(XML_DVI) $(XML_PS) $(XML_PDF) :: $(XML_SRCS)

html           :: $(XML_HTML)
html-no-chunks :: $(XML_HTML_NO_CHUNKS)
chm            :: $(XML_CHM)
HxS            :: $(XML_HxS)
fo             :: $(XML_FO)
dvi            :: $(XML_DVI)
ps             :: $(XML_PS)
pdf            :: $(XML_PDF)

CLEAN_FILES += $(XML_HTML_NO_CHUNKS) $(XML_FO) $(XML_DVI) $(XML_PS) $(XML_PDF)

extraclean ::
	$(RM) -rf $(XML_DOC).out $(FPTOOLS_CSS) $(basename $(XML_DOC)) $(basename $(XML_DOC))-htmlhelp

validate ::
	$(XMLLINT) --valid --noout $(XMLLINT_OPTS) $(XML_DOC).xml
endif

##############################################################################
#
#	Targets: clean
#
##############################################################################

# we have to be careful about recursion here; since all the clean
# targets are recursive, we don't want to make eg. distclean depend on
# clean because that would result in far too many recursive calls.

.PHONY: mostlyclean clean distclean maintainer-clean

mostlyclean::
	rm -f $(MOSTLY_CLEAN_FILES)

# extraclean is used for adding actions to the clean target.
extraclean::

clean:: extraclean
	rm -f $(MOSTLY_CLEAN_FILES) $(CLEAN_FILES)

distclean:: extraclean
	rm -f $(MOSTLY_CLEAN_FILES) $(CLEAN_FILES) $(DIST_CLEAN_FILES)

maintainer-clean:: extraclean
	@echo 'This command is intended for maintainers to use; it'
	@echo 'deletes files that may need special tools to rebuild.'
	rm -f $(MOSTLY_CLEAN_FILES) $(CLEAN_FILES) $(DIST_CLEAN_FILES) $(MAINTAINER_CLEAN_FILES)

################################################################################
#
#			Way management
#
################################################################################

# Here is the ingenious jiggery pokery that allows you to build multiple versions
# of a program in a single build tree.
#
# The ways setup requires the following variables to be set:
#
# Expects:	$(WAYS)			the possible "way" strings to one of 
#					which $(way) will be set

ifneq "$(way)" ""
ifeq "$(findstring $(way), $(WAYS))" ""
$(error Unknown way $(way) of $(WAYS))
endif
endif

# So how does $(way) ever get set to anything?  Answer, we recursively
# invoke make, setting $(way) on the command line.
# When do we do this recursion?  Answer: whenever the programmer
# asks make to make a target that involves a way suffix.
# We must remember *not* to recurse again; but that's easy: we
# just see if $(way) is set:

ifeq "$(way)" ""

# If $(WAYS) = p mc, then WAY_TARGETS expands to
#	%.p_lhs %.p_hs %.p_o ... %.mc_lhs %.p_hs ...
# and OTHER_WAY_TARGETS to
#	%_p.a %_p %_mc.a %_mc
# where the suffixes are from $(SUFFIXES)
#
# We have to treat libraries and "other" targets differently, 
# because their names are of the form
#	libHS_p.a and Foo_p
# whereas everything else has names of the form
#	Foo.p_o

FPTOOLS_SUFFIXES := o hi hc

WAY_TARGETS     = $(foreach way,$(WAYS),$(foreach suffix, $(FPTOOLS_SUFFIXES), %.$(way)_$(suffix)))
LIB_WAY_TARGETS = $(foreach way,$(filter-out %dyn,$(WAYS)), %_$(way).a)
LIB_WAY_TARGETS_DYN =  $(foreach way,$(filter %dyn,$(WAYS)), %$(subst dyn,-ghc$(ProjectVersion),$(subst _dyn,dyn,$(way)))$(soext))

# $@ will be something like Foo.p_o
# $(suffix $@)     returns .p_o
# $(subst .,.p_o)  returns p_o
# $(subst _,.,p_o) returns p.o   (clever)
# $(basename p.o)  returns p
# 
$(WAY_TARGETS) :
	$(MAKE) way=$(basename $(subst _,.,$(subst .,,$(suffix $@)))) $@

# $(@F) will be something like libHS_p.a, or Foo_p
# $(basename $(@F)) will be libHS_p, or Foo_p
# The sed script extracts the "p" part.

$(LIB_WAY_TARGETS) :
	$(MAKE) $(MFLAGS) $@ way=$(subst .,,$(suffix $(subst _,.,$(basename $@))))

$(LIB_WAY_TARGETS_DYN) :
	$(MAKE) $(MFLAGS) $@ way=$(patsubst _dyn,dyn,$(subst .,,$(suffix $(subst _,.,$(basename $(subst -ghc$(ProjectVersion),,$@)))))_dyn)

endif	# if way

# -------------------------------------------------------------------------
# Object and interface files have suffixes tagged with their ways

ifneq "$(way)" ""
SRC_HC_OPTS += -hisuf $(way_)hi -hcsuf $(way_)hc -osuf $(way_)o
endif

# -------------------------------------------------------------------------
# Rules to invoke the current target recursively for each way

ifneq "$(strip $(WAYS))" ""
ifeq "$(way)" ""

# NB: the targets exclude 
#	boot runtests
# since these are way-independent
all docs TAGS clean distclean mostlyclean maintainer-clean install ::
	@echo "------------------------------------------------------------------------"
	@echo "== Recursively making \`$@' for ways: $(WAYS) ..."
	@echo "PWD = $(shell pwd)"
	@echo "------------------------------------------------------------------------"
# Don't rely on -e working, instead we check exit return codes from sub-makes.
	case '${MFLAGS}' in *-[ik]*) x_on_err=0;; *-r*[ik]*) x_on_err=0;; *) x_on_err=1;; esac; \
	for i in $(WAYS) ; do \
	  echo "------------------------------------------------------------------------"; \
	  echo "== $(MAKE) way=$$i $@;"; \
	  echo "PWD = $(shell pwd)"; \
	  echo "------------------------------------------------------------------------"; \
	  $(MAKE) way=$$i --no-print-directory $(MFLAGS) $@ ; \
	  if [ $$? -eq 0 ] ; then true; else exit $$x_on_err; fi; \
	done
	@echo "------------------------------------------------------------------------"
	@echo "== Finished recursively making \`$@' for ways: $(WAYS) ..."
	@echo "PWD = $(shell pwd)"
	@echo "------------------------------------------------------------------------"

endif
endif

include $(TOP)/mk/recurse.mk

# -----------------------------------------------------------------------------
# Further cleaning

# Sometimes we want to clean things only after the recursve cleaning
# has heppened (eg. if the files we're about to remove would affect
# the recursive traversal).

distclean::
	rm -f $(LATE_DIST_CLEAN_FILES)

maintainer-clean::
	rm -f $(LATE_DIST_CLEAN_FILES)