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Tests for a particular target environment. If the currently configured target matches the argument string, the result is 1 ; otherwise the result is 0. target must be a full three-part configure target name; in particular, you may not use the shorter nicknames supported by configure (but you can use wildcard characters, using shell syntax, to specify sets of names). If it is passed a NULL string, then it returns the name of the build canonical configuration.

istarget { args }