Makefile:依赖列表中的$ subst

时间:2013-02-06 14:49:31

标签: makefile

我有一个大致如下的Makefile:

FIGURES = A1_B1_C1.eps A2_B2_C2.eps A3_B3_C3.eps
NUMBERS = 1 2 3

all : $(FIGURES)

%.eps : $(foreach num, $(NUMBERS), $(subst B, $(num), %).out)
    # my_program($+, $@);

%.out :

关键是我的数字的文件名包含某些信息(A,B,C),并且每个图由my_program从几个(在示例3中)文件中创建。 虽然每个图形的文件名都具有格式Ax_Bx_Cx.eps,但创建图形的数据文件的名称如下所示:

Ax_1x_Cx.out
Ax_2x_Cx.out
Ax_3x_Cx.out

因此,对于每个图,我需要一个动态创建的依赖列表,其中包含多个文件名。换句话说,我上面例子的所需输出是:

  

#my_program(A1_11_C1.out A1_21_C1.out A1_31_C1.out,A1_B1_C1.eps);

     

#my_program(A2_12_C2.out A2_22_C2.out A2_32_C2.out,A2_B2_C2.eps);

     

#my_program(A3_13_C3.out A3_23_C3.out A3_33_C3.out,A3_B2_C3.eps);

不幸的是,subst命令似乎被忽略了,因为输出如下所示:

  

#my_program(A1_B1_C1.out A1_B1_C1.out A1_B1_C1.out,A1_B1_C1.eps);

     

#my_program(A2_B2_C2.out A2_B2_C2.out A2_B2_C2.out,A2_B2_C2.eps);

     

#my_program(A3_B3_C3.out A3_B3_C3.out A3_B3_C3.out,A3_B3_C3.eps);

我查看了this possible duplicate,但认为答案无法帮助我,因为我使用%而不是$@,这在先决条件中应该没问题。

显然我在这里弄错了。非常感谢任何帮助。

1 个答案:

答案 0 :(得分:3)

要进行花哨的先决条件操作,至少需要make-3.82支持Secondary Expansion feature

FIGURES = A1_B1_C1.eps A2_B2_C2.eps A3_B3_C3.eps
NUMBERS = 1 2 3

all : $(FIGURES)

.SECONDEXPANSION:

$(FIGURES) : %.eps : $$(foreach num,$$(NUMBERS),$$(subst B,$$(num),$$*).out)
    @echo "my_program($+, $@)"

%.out :
    touch $@

输出:

$ make
touch A1_11_C1.out
touch A1_21_C1.out
touch A1_31_C1.out
my_program(A1_11_C1.out A1_21_C1.out A1_31_C1.out, A1_B1_C1.eps)
touch A2_12_C2.out
touch A2_22_C2.out
touch A2_32_C2.out
my_program(A2_12_C2.out A2_22_C2.out A2_32_C2.out, A2_B2_C2.eps)
touch A3_13_C3.out
touch A3_23_C3.out
touch A3_33_C3.out
my_program(A3_13_C3.out A3_23_C3.out A3_33_C3.out, A3_B3_C3.eps)