1 # $NetBSD: posix1.mk,v 1.6 2020/10/24 08:50:17 rillig Exp $ 2 3 # Keep the default suffixes from interfering, just in case. 4 .SUFFIXES: 5 6 all: line-continuations suffix-substitution localvars 7 8 # we need to clean for repeatable results 9 .BEGIN: clean 10 clean: 11 @rm -f lib.a dir/* dummy obj* 12 .END: 13 @rm -f lib.a dir/* dummy obj* 14 15 # 16 # Line continuations 17 # 18 19 # Escaped newlines and leading whitespace from the next line are replaced 20 # with single space, except in commands, where the escape and the newline 21 # are retained, but a single leading tab (if any) from the next line is 22 # removed. (PR 49085) 23 # Expect: 24 # ${VAR} = "foo bar baz" 25 # a 26 # b 27 # c 28 VAR = foo\ 29 \ 30 bar\ 31 baz 32 33 line-continuations: 34 @echo '$${VAR} = "${VAR}"' 35 @echo 'aXbXc' | sed -e 's/X/\ 36 /g' 37 38 39 # 40 # Suffix substitution 41 # 42 43 # The only variable modifier accepted by POSIX. 44 # ${VAR:s1=s2}: replace s1, if found, with s2 at end of each word in 45 # ${VAR}. s1 and s2 may contain macro expansions. 46 # Expect: foo baR baz, bar baz, foo bar baz, fooadd baradd bazadd 47 suffix-substitution: 48 @echo '${VAR:r=R}, ${VAR:foo=}, ${VAR:not_there=wrong}, ${VAR:=add}' 49 50 51 # 52 # Local variables: regular forms, D/F forms and suffix substitution. 53 # 54 55 # In the past substitutions did not work with the D/F forms and those 56 # forms were not available for $?. (PR 49085) 57 58 ARFLAGS= -rcv 59 60 localvars: lib.a 61 62 # $@ = target or archive name $< = implied source 63 # $* = target without suffix $? = sources newer than target 64 # $% = archive member name 65 LOCALS= \ 66 "Local variables\n\ 67 \$${@}=\"${@}\" \$${<}=\"${<}\"\n\ 68 \$${*}=\"${*}\" \$${?}=\"${?}\"\n\ 69 \$${%%}=\"${%}\"\n\n" 70 71 # $XD = directory part of X $XF = file part of X 72 # X is one of the local variables. 73 LOCAL_ALTERNATIVES= \ 74 "Directory and filename parts of local variables\n\ 75 \$${@D}=\"${@D}\" \$${@F}=\"${@F}\"\n\ 76 \$${<D}=\"${<D}\" \$${<F}=\"${<F}\"\n\ 77 \$${*D}=\"${*D}\" \$${*F}=\"${*F}\"\n\ 78 \$${?D}=\"${?D}\" \$${?F}=\"${?F}\"\n\ 79 \$${%%D}=\"${%D}\" \$${%%F}=\"${%F}\"\n\n" 80 81 # Do all kinds of meaningless substitutions on local variables to see 82 # if they work. Add, remove and replace things. 83 VAR2= .o 84 VAR3= foo 85 LOCAL_SUBSTITUTIONS= \ 86 "Local variable substitutions\n\ 87 \$${@:.o=}=\"${@:.o=}\" \$${<:.c=.C}=\"${<:.c=.C}\"\n\ 88 \$${*:=.h}=\"${*:=.h}\" \$${?:.h=.H}=\"${?:.h=.H}\"\n\ 89 \$${%%:=}=\"${%:=}\"\n\n" 90 91 LOCAL_ALTERNATIVE_SUBSTITUTIONS= \ 92 "Target with suffix transformations\n\ 93 \$${@D:=append}=\"${@D:=append}\"\n\ 94 \$${@F:.o=.O}=\"${@F:.o=.O}\"\n\ 95 \n\ 96 Implied source with suffix transformations\n\ 97 \$${<D:r=rr}=\"${<D:r=rr}\"\n\ 98 \$${<F:.c=.C}=\"${<F:.c=.C}\"\n\ 99 \n\ 100 Suffixless target with suffix transformations\n\ 101 \$${*D:.=dot}=\"${*D:.=dot}\"\n\ 102 \$${*F:.a=}=\"${*F:.a=}\"\n\ 103 \n\ 104 Out-of-date dependencies with suffix transformations\n\ 105 \$${?D:ir=}=\"${?D:ir=}\"\n\ 106 \$${?F:.h=.H}=\"${?F:.h=.H}\"\n\ 107 \n\ 108 Member with suffix transformations\n\ 109 \$${%%D:.=}=\"${%D:.=}\"\n\ 110 \$${%%F:\$${VAR2}=\$${VAR}}=\"${%F:${VAR2}=${VAR}}\"\n\n" 111 112 .SUFFIXES: .c .o .a 113 114 # The system makefiles make the .c.a rule .PRECIOUS with a special source, 115 # but such a thing is not POSIX compatible. It's also somewhat useless 116 # in a test makefile. 117 .c.a: 118 @printf ${LOCALS} 119 @printf ${LOCAL_ALTERNATIVES} 120 @printf ${LOCAL_SUBSTITUTIONS} 121 @printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS} 122 cc -c -o '${%}' '${<}' 123 ar ${ARFLAGS} '${@}' '${%}' 124 rm -f '${%}' 125 126 .c.o: 127 @printf ${LOCALS} 128 @printf ${LOCAL_ALTERNATIVES} 129 @printf ${LOCAL_SUBSTITUTIONS} 130 @printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS} 131 cc -c -o '${@}' '${<}' 132 133 # Some of these rules are padded with useless extra dependencies just so 134 # that ${?} has more than one file. 135 136 lib.a: lib.a(obj1.o) lib.a(obj2.o) lib.a(obj3.o) 137 ar -s '${@}' 138 139 # Explicit rule where the dependency is an inferred file. The dependency 140 # object's name differs from the member's because there was a bug which 141 # forced a dependency on member even when no such dependency was specified 142 # (PR 49086). 143 lib.a(obj1.o): dir/obj_1.o dummy 144 @printf ${LOCALS} 145 @printf ${LOCAL_ALTERNATIVES} 146 @printf ${LOCAL_SUBSTITUTIONS} 147 @printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS} 148 cp 'dir/obj_1.o' '$%' 149 ar ${ARFLAGS} '${@}' '$%' 150 rm -f '$%' 151 152 # Excplicit rule where the dependency also has an explicit rule. 153 lib.a(obj2.o): obj2.o 154 ar ${ARFLAGS} '${@}' '${%}' 155 156 # Use .c.a inference with an extra dependency. 157 lib.a(obj3.o): obj3.h dir/dummy 158 159 # Use .c.o inference with an extra dependency. 160 dir/obj_1.o: dir/obj_1.h 161 162 # According to POSIX, $* is only required for inference rules and $<'s 163 # value is unspecified outside of inference rules. Strictly speaking 164 # we shouldn't be expanding them here but who cares. At least we get 165 # to check that the program does nothing stupid (like crash) with them. 166 # The C file is named differently from the object file because there 167 # was a bug which forced dependencies based on inference rules on all 168 # applicable targets (PR 49086). 169 obj2.o: obj_2.c obj_2.h dir/obj_1.h 170 @printf ${LOCALS} 171 @printf ${LOCAL_ALTERNATIVES} 172 @printf ${LOCAL_SUBSTITUTIONS} 173 @printf ${LOCAL_ALTERNATIVE_SUBSTITUTIONS} 174 cc -c -o '${@}' 'obj_2.c' 175 176 # Hey, this is make, we can make our own test data setup! obj1.c 177 # and obj2.c are not used, so they should not get created. They're here 178 # as a bait for a regression into the forced dependencies discussed earlier. 179 obj1.c dir/obj_1.c obj2.c obj_2.c obj3.c: 180 mkdir -p '${@D}' 181 printf '#include "${@F:.c=.h}"\nconst char* ${@F:.c=} = "${@}";\n' \ 182 >'${@}' 183 184 dir/obj_1.h obj_2.h obj3.h dummy dir/dummy: 185 mkdir -p '${@D}' 186 touch '${@}' 187
Indexes created Sun Sep 21 19:09:51 GMT 2025