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janet/extra/metabuild.dst
Calvin Rose 169a22f03e Fix init.dst, work on metabuild tool to make
native module creation easier
2018-08-03 21:50:32 -04:00

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# A script to help generate build files on different platforms
(def- make-cflags "-std=c99 -Wall -Wextra -O2 -shared -fpic")
(def- make-ldflags "")
(defn $
"Do and get the value of a subshell command"
[command]
(def f (file.popen command))
(def ret (file.read f :all))
(file.close f)
ret)
(defn- emit-rule
"Emit a rule in a makefile"
@[out target deps recipe]
(default recipe "@echo '-----'")
(file.write
out
target
": "
(if (indexed? deps) (string.join deps " ") deps)
"\n\t"
(if (indexed? recipe) (string.join recipe "\n\t") recipe)
"\n\n")
out)
(defn generate-make
"Generate a makefile"
[out-path sources target]
(def out (file.open out-path :w))
(def csources (filter (fn [x] (= ".c" (string.slice x -2))) sources))
(def hsources (filter (fn [x] (= ".h" (string.slice x -2))) sources))
(file.write
out
"# Autogenerated Makefile, do not edit\n"
"# Generated at " ($ `date`)
"\nCFLAGS:=" make-cflags
"\nLDFLAGS:=" make-ldflags
"\nSOURCES:=" (string.join csources " ")
"\nHEADERS:=" (string.join hsources " ")
"\nOBJECTS:=$(patsubst %.c,%.o,${SOURCES})"
"\nTARGET:=" target ".so"
"\n\n")
(emit-rule out "all" "${TARGET}")
(emit-rule out "%.o" @["%.c" "${HEADERS}"] "${CC} ${CFLAGS} -o $@ $< ${LDFLAGS}")
(emit-rule out "${TARGET}" "${SOURCES}" "${CC} ${CFLAGS} -o $@ $^ ${LDFLAGS}")
(emit-rule out "clean" "" "rm ${OBJECTS}")
# Phony targets
(emit-rule out ".PHONY" @["all" "clean"])
nil)