繼續(xù)翻譯

3.8 Secondary Expansion ======================= In the previous section we learned that GNU `make' works in two distinct phases: a read-in phase and a target-update phase (*note How `make' Reads a Makefile: Reading Makefiles.). GNU make also has the ability to enable a _second expansion_ of the prerequisites (only) for some or all targets defined in the makefile. In order for this second expansion to occur, the special target `.SECONDEXPANSION' must be defined before the first prerequisite list that makes use of this feature.

3.8 二次擴(kuò)展

在前面的章節(jié)中我們了解到 GNU make 的工作分為兩個(gè)階段：一個(gè)讀取階段 和一個(gè)目的變更階段(*note How 'make' Reads a Makefile: Reading Makefiles.)

GNU make 也有能力允許對(duì) 前提條件進(jìn)行二次擴(kuò)展。為了此二次擴(kuò)展可以發(fā)生，在第一個(gè)前提條件之前，特殊的目的 .SECONDEXPANSION 必須被定義。

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