xref: /src/usr.bin/make/unit-tests/posix1.mk

# $NetBSD: posix1.mk,v 1.2 2014/08/29 15:55:44 sjg Exp $

# Keep the default suffixes from interfering, just in case.
.SUFFIXES:

all:	line-continuations suffix-substitution localvars

# we need to clean for repeatable results
.BEGIN: clean
clean:
	@rm -f lib.a dir/* dummy obj*

#
# Line continuations
#

# Escaped newlines and leading whitespace from the next line are replaced
# with single space, except in commands, where the escape and the newline
# are retained, but a single leading tab (if any) from the next line is
# removed. (PR 49085)
# Expect:
# $(VAR) = "foo  bar baz"
# a
# b
# c
VAR = foo\
\
	  bar\
 baz

line-continuations:
	@echo '$$(VAR) = "$(VAR)"'
	@echo 'aXbXc' | sed -e 's/X/\
	/g'


#
# Suffix substitution
#

# The only variable modifier accepted by POSIX.
# $(VAR:s1=s2): replace s1, if found, with s2 at end of each word in
# $(VAR).  s1 and s2 may contain macro expansions.
# Expect: foo baR baz, bar baz, foo bar baz, fooadd baradd bazadd
suffix-substitution:
	@echo '$(VAR:r=R), $(VAR:foo=), $(VAR:not_there=wrong), $(VAR:=add)'


#
# Local variables: regular forms, D/F forms and suffix substitution.
#

# In the past substitutions did not work with the D/F forms and those
# forms were not available for $?.  (PR 49085)

ARFLAGS = -rcv

localvars: lib.a

# $@ = target or archive name	$< = implied source
# $* = target without suffix 	$? = sources newer than target
# $% = archive member name
LOCALS = \
	"Local variables\n\
	\$$(@)=\"$(@)\" \$$(<)=\"$(<)\"\n\
	\$$(*)=\"$(*)\" \$$(?)=\"$(?)\"\n\
	\$$(%%)=\"$(%)\"\n\n"

# $XD = directory part of X	$XF = file part of X
# X is one of the local variables.
LOCAL_ALTERNATIVES = \
	"Directory and filename parts of local variables\n\
	\$$(@D)=\"$(@D)\" \$$(@F)=\"$(@F)\"\n\
	\$$(<D)=\"$(<D)\" \$$(<F)=\"$(<F)\"\n\
	\$$(*D)=\"$(*D)\" \$$(*F)=\"$(*F)\"\n\
	\$$(?D)=\"$(?D)\" \$$(?F)=\"$(?F)\"\n\
	\$$(%%D)=\"$(%D)\" \$$(%%F)=\"$(%F)\"\n\n"

# Do all kinds of meaningless substitutions on local variables to see
# if they work.  Add, remove and replace things.
VAR2 = .o
VAR3 = foo
LOCAL_SUBSTITUTIONS = \
	"Local variable substitutions\n\
	\$$(@:.o=)=\"$(@:.o=)\" \$$(<:.c=.C)=\"$(<:.c=.C)\"\n\
	\$$(*:=.h)=\"$(*:=.h)\" \$$(?:.h=.H)=\"$(?:.h=.H)\"\n\
	\$$(%%:=)=\"$(%:=)\"\n\n"

LOCAL_ALTERNATIVE_SUBSTITUTIONS = \
	"Target with suffix transformations\n\
	\$$(@D:=append)=\"$(@D:=append)\"\n\
	\$$(@F:.o=.O)=\"$(@F:.o=.O)\"\n\
	\n\
	Implied source with suffix transformations\n\
	\$$(<D:r=rr)=\"$(<D:r=rr)\"\n\
	\$$(<F:.c=.C)=\"$(<F:.c=.C)\"\n\
	\n\
	Suffixless target with suffix transformations\n\
	\$$(*D:.=dot)=\"$(*D:.=dot)\"\n\
	\$$(*F:.a=)=\"$(*F:.a=)\"\n\
	\n\
	Out-of-date dependencies with suffix transformations\n\
	\$$(?D:ir=)=\"$(?D:ir=)\"\n\
	\$$(?F:.h=.H)=\"$(?F:.h=.H)\"\n\
	\n\
	Member with suffix transformations\n\
	\$$(%%D:.=)=\"$(%D:.=)\"\n\
	\$$(%%F:\$$(VAR2)=\$$(VAR))=\"$(%F:$(VAR2)=$(VAR))\"\n\n"

.SUFFIXES: .c .o .a

# The system makefiles make the .c.a rule .PRECIOUS with a special source,
# but such a thing is not POSIX compatible.  It's also somewhat useless
# in a test makefile.
.c.a:
	@printf $(LOCALS)
	@printf $(LOCAL_ALTERNATIVES)
	@printf $(LOCAL_SUBSTITUTIONS)
	@printf $(LOCAL_ALTERNATIVE_SUBSTITUTIONS)
	cc -c -o '$(%)' '$(<)'
	ar $(ARFLAGS) '$(@)' '$(%)'
	rm -f '$(%)'

.c.o:
	@printf $(LOCALS)
	@printf $(LOCAL_ALTERNATIVES)
	@printf $(LOCAL_SUBSTITUTIONS)
	@printf $(LOCAL_ALTERNATIVE_SUBSTITUTIONS)
	cc -c -o '$(@)' '$(<)'

# Some of these rules are padded with useless extra dependencies just so
# that $(?) has more than one file.

lib.a: lib.a(obj1.o) lib.a(obj2.o) lib.a(obj3.o)
	ar -s '$(@)'

# Explicit rule where the dependency is an inferred file.  The dependency
# object's name differs from the member's because there was a bug which
# forced a dependency on member even when no such dependency was specified
# (PR 49086).
lib.a(obj1.o): dir/obj_1.o dummy
	@printf $(LOCALS)
	@printf $(LOCAL_ALTERNATIVES)
	@printf $(LOCAL_SUBSTITUTIONS)
	@printf $(LOCAL_ALTERNATIVE_SUBSTITUTIONS)
	cp 'dir/obj_1.o' '$%'
	ar $(ARFLAGS) '$(@)' '$%'
	rm -f '$%'

# Excplicit rule where the dependency also has an explicit rule.
lib.a(obj2.o): obj2.o
	ar $(ARFLAGS) '$(@)' '$(%)'

# Use .c.a inference with an extra dependency.
lib.a(obj3.o): obj3.h dir/dummy

# Use .c.o inference with an extra dependency.
dir/obj_1.o: dir/obj_1.h

# According to POSIX, $* is only required for inference rules and $<'s
# value is unspecified outside of inference rules.  Strictly speaking
# we shouldn't be expanding them here but who cares.  At least we get
# to check that the program does nothing stupid (like crash) with them.
# The C file is named differently from the object file because there
# was a bug which forced dependencies based on inference rules on all
# applicable targets (PR 49086).
obj2.o: obj_2.c obj_2.h dir/obj_1.h
	@printf $(LOCALS)
	@printf $(LOCAL_ALTERNATIVES)
	@printf $(LOCAL_SUBSTITUTIONS)
	@printf $(LOCAL_ALTERNATIVE_SUBSTITUTIONS)
	cc -c -o '$(@)' 'obj_2.c'

# Hey, this is make, we can make our own test data setup!  obj1.c
# and obj2.c are not used, so they should not get created.  They're here
# as a bait for a regression into the forced dependencies discussed earlier.
obj1.c dir/obj_1.c obj2.c obj_2.c obj3.c:
	mkdir -p '$(@D)'
	printf '#include "$(@F:.c=.h)"\nconst char* $(@F:.c=) = "$(@)";\n' \
	    >'$(@)'

dir/obj_1.h obj_2.h obj3.h dummy dir/dummy:
	mkdir -p '$(@D)'
	touch '$(@)'