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Automatic variables
| $@ | The name of the target. |
| $% | The target member name, when the target is an archive member. |
| $< | The name of the first (or only) prerequisite. |
| $? | The names of all the prerequisites that are newer than the target, with spaces between them. |
| $^ $+ |
The names of all the prerequisites, with spaces between them. The value of $^ omits duplicate prerequisites, while $+ retains them and preserves their order. |
| $* | The stem with which an implicit rule matches. |
| $(@D) $(@F) |
The directory part and the file-within-directory part of $@ |
| $(*D) $(*F) |
The directory part and the file-within-directory part of $* |
| $(%D) $(%F) |
The directory part and the file-within-directory part of $% |
| $(<D) $(<F) |
The directory part and the file-within-directory part of $< |
| $(^D) $(^F) |
The directory part and the file-within-directory part of $^ |
| $(+D) $(+F) |
The directory part and the file-within-directory part of $+ |
| $(?D) $(?F) |
The directory part and the file-within-directory part of $? |
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