185 lines
5.3 KiB
Makefile
185 lines
5.3 KiB
Makefile
# $NetBSD: posix1.mk,v 1.3 2014/08/30 22:21:08 sjg Exp $
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# Keep the default suffixes from interfering, just in case.
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.SUFFIXES:
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all: line-continuations suffix-substitution localvars
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# we need to clean for repeatable results
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.BEGIN: clean
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clean:
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@rm -f lib.a dir/* dummy obj*
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#
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# Line continuations
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#
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# Escaped newlines and leading whitespace from the next line are replaced
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# with single space, except in commands, where the escape and the newline
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# are retained, but a single leading tab (if any) from the next line is
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# removed. (PR 49085)
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# Expect:
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# ${VAR} = "foo bar baz"
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# a
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# b
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# c
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VAR = foo\
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\
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bar\
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baz
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line-continuations:
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@echo '$${VAR} = "${VAR}"'
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@echo 'aXbXc' | sed -e 's/X/\
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/g'
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#
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# Suffix substitution
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#
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# The only variable modifier accepted by POSIX.
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# ${VAR:s1=s2}: replace s1, if found, with s2 at end of each word in
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# ${VAR}. s1 and s2 may contain macro expansions.
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# Expect: foo baR baz, bar baz, foo bar baz, fooadd baradd bazadd
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suffix-substitution:
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@echo '${VAR:r=R}, ${VAR:foo=}, ${VAR:not_there=wrong}, ${VAR:=add}'
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#
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# Local variables: regular forms, D/F forms and suffix substitution.
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#
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# In the past substitutions did not work with the D/F forms and those
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# forms were not available for $?. (PR 49085)
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ARFLAGS = -rcv
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localvars: lib.a
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# $@ = target or archive name $< = implied source
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# $* = target without suffix $? = sources newer than target
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# $% = archive member name
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LOCALS = \
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"Local variables\n\
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\$${@}=\"${@}\" \$${<}=\"${<}\"\n\
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\$${*}=\"${*}\" \$${?}=\"${?}\"\n\
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\$${%%}=\"${%}\"\n\n"
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# $XD = directory part of X $XF = file part of X
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# X is one of the local variables.
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LOCAL_ALTERNATIVES = \
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"Directory and filename parts of local variables\n\
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\$${@D}=\"${@D}\" \$${@F}=\"${@F}\"\n\
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\$${<D}=\"${<D}\" \$${<F}=\"${<F}\"\n\
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\$${*D}=\"${*D}\" \$${*F}=\"${*F}\"\n\
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\$${?D}=\"${?D}\" \$${?F}=\"${?F}\"\n\
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\$${%%D}=\"${%D}\" \$${%%F}=\"${%F}\"\n\n"
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# Do all kinds of meaningless substitutions on local variables to see
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# if they work. Add, remove and replace things.
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VAR2 = .o
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VAR3 = foo
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LOCAL_SUBSTITUTIONS = \
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"Local variable substitutions\n\
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\$${@:.o=}=\"${@:.o=}\" \$${<:.c=.C}=\"${<:.c=.C}\"\n\
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\$${*:=.h}=\"${*:=.h}\" \$${?:.h=.H}=\"${?:.h=.H}\"\n\
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\$${%%:=}=\"${%:=}\"\n\n"
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LOCAL_ALTERNATIVE_SUBSTITUTIONS = \
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"Target with suffix transformations\n\
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\$${@D:=append}=\"${@D:=append}\"\n\
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\$${@F:.o=.O}=\"${@F:.o=.O}\"\n\
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\n\
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Implied source with suffix transformations\n\
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\$${<D:r=rr}=\"${<D:r=rr}\"\n\
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\$${<F:.c=.C}=\"${<F:.c=.C}\"\n\
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\n\
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Suffixless target with suffix transformations\n\
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\$${*D:.=dot}=\"${*D:.=dot}\"\n\
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\$${*F:.a=}=\"${*F:.a=}\"\n\
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\n\
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Out-of-date dependencies with suffix transformations\n\
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\$${?D:ir=}=\"${?D:ir=}\"\n\
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\$${?F:.h=.H}=\"${?F:.h=.H}\"\n\
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\n\
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Member with suffix transformations\n\
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\$${%%D:.=}=\"${%D:.=}\"\n\
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\$${%%F:\$${VAR2}=\$${VAR}}=\"${%F:${VAR2}=${VAR}}\"\n\n"
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.SUFFIXES: .c .o .a
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# The system makefiles make the .c.a rule .PRECIOUS with a special source,
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# but such a thing is not POSIX compatible. It's also somewhat useless
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# in a test makefile.
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.c.a:
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@printf ${LOCALS}
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@printf ${LOCAL_ALTERNATIVES}
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@printf ${LOCAL_SUBSTITUTIONS}
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@printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS}
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cc -c -o '${%}' '${<}'
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ar ${ARFLAGS} '${@}' '${%}'
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rm -f '${%}'
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.c.o:
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@printf ${LOCALS}
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@printf ${LOCAL_ALTERNATIVES}
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@printf ${LOCAL_SUBSTITUTIONS}
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@printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS}
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cc -c -o '${@}' '${<}'
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# Some of these rules are padded with useless extra dependencies just so
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# that ${?} has more than one file.
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lib.a: lib.a(obj1.o) lib.a(obj2.o) lib.a(obj3.o)
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@ar -s '${@}'
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# Explicit rule where the dependency is an inferred file. The dependency
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# object's name differs from the member's because there was a bug which
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# forced a dependency on member even when no such dependency was specified
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# (PR 49086).
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lib.a(obj1.o): dir/obj_1.o dummy
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@printf ${LOCALS}
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@printf ${LOCAL_ALTERNATIVES}
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@printf ${LOCAL_SUBSTITUTIONS}
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@printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS}
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cp 'dir/obj_1.o' '$%'
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ar ${ARFLAGS} '${@}' '$%'
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rm -f '$%'
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# Excplicit rule where the dependency also has an explicit rule.
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lib.a(obj2.o): obj2.o
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ar ${ARFLAGS} '${@}' '${%}'
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# Use .c.a inference with an extra dependency.
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lib.a(obj3.o): obj3.h dir/dummy
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# Use .c.o inference with an extra dependency.
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dir/obj_1.o: dir/obj_1.h
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# According to POSIX, $* is only required for inference rules and $<'s
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# value is unspecified outside of inference rules. Strictly speaking
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# we shouldn't be expanding them here but who cares. At least we get
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# to check that the program does nothing stupid (like crash) with them.
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# The C file is named differently from the object file because there
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# was a bug which forced dependencies based on inference rules on all
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# applicable targets (PR 49086).
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obj2.o: obj_2.c obj_2.h dir/obj_1.h
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@printf ${LOCALS}
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@printf ${LOCAL_ALTERNATIVES}
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@printf ${LOCAL_SUBSTITUTIONS}
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@printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS}
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cc -c -o '${@}' 'obj_2.c'
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# Hey, this is make, we can make our own test data setup! obj1.c
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# and obj2.c are not used, so they should not get created. They're here
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# as a bait for a regression into the forced dependencies discussed earlier.
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obj1.c dir/obj_1.c obj2.c obj_2.c obj3.c:
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mkdir -p '${@D}'
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printf '#include "${@F:.c=.h}"\nconst char* ${@F:.c=} = "${@}";\n' \
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>'${@}'
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dir/obj_1.h obj_2.h obj3.h dummy dir/dummy:
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mkdir -p '${@D}'
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touch '${@}'
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