c++ - Makefile:7: target ( given more than once in the same rule -

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im not familiar make system. when tried execute program below, there no problem:

./prog.out arg1 arg2 arg3

when decided make, added following script makefile

parse ${parameters}:      ./prog.out ${parameters}

its strange when works well; 

 make parse parameters="aaa bbb ccc"

and these characters: '(' , ')' generates errors!

make parse parameters="( d , ( d , ( d , d ) ) )" makefile:7: target `(' given more once in same rule. makefile:7: target `d' given more once in same rule. makefile:7: target `,' given more once in same rule. makefile:7: target `(' given more once in same rule. makefile:7: target `d' given more once in same rule. makefile:7: target `,' given more once in same rule. makefile:7: target `d' given more once in same rule. makefile:7: target `)' given more once in same rule. makefile:7: target `)' given more once in same rule. ./prog.out  ( d , ( d , ( d , d ) ) ) /bin/sh: 1: syntax error: "(" unexpected make: *** [parse] error 2

but works well;

./prog.out "( d , ( d , ( d , d ) ) )"

the make version 3.81

any idea?

parse ${parameters}:      ./prog.out ${parameters}

the above makefile snippet creates target named parse , 1 each word in expansion of variable parameters.

so in invocation make parse parameters="aaa bbb ccc" line expands parse aaa bbb ccc: , end defining 4 targets parse, aaa, bbb , ccc.

with invocation make parse parameters="( d , ( d , ( d , d ) ) )" expands parse ( d , ( d , ( d , d ) ) ): , define targets parse,d,(,,and)withdbeing listed 4 times,,three times,(three times , ) 3 times. (which why make complains targets being redefined.

if want parameters used variable in command run don't need in target line @ all.

parse:      ./prog.out "${parameters}"

and use

make parse parameters="aaa bbb ccc

or

make parse parameters="( d , ( d , ( d , d ) ) )"

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