makefile模式规则:单通配符，先决条件中有多个实例

Question

希望这是关于创建模式规则的一个基本问题:我想在规则的先决条件中多次使用通配符，即在Makefile中

data/%P1.m: $(PROJHOME)/data/%/ISCAN/%P1.RAW
        @echo "  Writing temporary matlab file for $*"
        # do something

data/%P2.m: $(PROJHOME)/data/%/ISCAN/AGP2.RAW
            @echo "  Writing temporary matlab file for $*"
            # do something

在本例中，我尝试在通配符%为AG时调用make。文件$(PROJHOME)/data/AG/ISCAN/AGP1.RAW和$(PROJHOME)/data/AG/ISCAN/AGP2.RAW都存在。我尝试执行以下make命令，并得到以下输出：

[jshen@iLab10 gender-diffs]$ make data/AGP1.m
make: *** No rule to make target `data/AGP1.m'.  Stop.

[jshen@iLab10 gender-diffs]$ make data/AGP2.m
Writing temporary matlab file for AG, part 2...

[jshen@iLab10 gender-diffs]$ ls data/AG/ISCAN/AG*
data/AG/ISCAN/AGP1.RAW  data/AG/ISCAN/AGP2.RAW

如何在第一个make规则中实现同一通配符的多个实例？

Answer 1

这似乎起作用了：

.SECONDEXPANSION:    
data/%P1.m: $(PROJHOME)/data/$$*/ISCAN/$$*P1.RAW
            @echo "Writing temporary matlab file for $*, part 1..."