makefile ifeq 提示“ 遗漏分隔符” 错误的解决方法

    一般的 “遗漏分隔符“的错误主要是指：命令行之前的TAB键敲为空格键了。但是我遇见的错误，若下所示，解决的方法也在下面描述了。

 

 错误的makefile文件 

 1 .PHONY :all clean
 2
 3 MKDIR = mkdir
 4 CC = gcc
 5 RM = rm
 6 RMFLAGS = -rf
 7
 8 DIR_OBJS = objs
 9 DIR_RELEASE = Release
10 DIR_DEPS = deps
11 DIRS = $(DIR_OBJS) $(DIR_RELEASE) $(DIR_DEPS)
12
13 RELEASE =  complicated
14 RELEASE := $(addprefix $(DIR_RELEASE)/,$(RELEASE))
15 SRCS = $(wildcard *.c)
16 OBJS = $(SRCS:.c=.o)
17 OBJS := $(addprefix $(DIR_OBJS)/, $(OBJS))
18 DEPS = $(SRCS:.c=.dep)
19 DEPS := $(addprefix $(DIR_DEPS)/, $(DEPS))
20 ifeq("$(wildcard $(DIR_OBJS))", "")
21 DEP_DIR_OBJS := $(DIR_OBJS)
22 endif
23 ifeq("$(wildcard $(DIR_RELEASE))","")
24 DEP_DIR_RELEASE := $(DIR_RELEASE)
25 endif
26 ifeq("$(wildcard $(DIR_DEPS))", "")
27 DEP_DIR_DEPS := $(DIR_DEPS)
28 endif
29
30 all: $(RELEASE)
31
32 include $(DEPS)
33
34 $(DIRS):
35     $(MKDIR) $@
36 $(RELEASE) :$(DEP_DIR_RELEASE) $(OBJS)
37     $(CC) -o $@ $(filter %.o,$^)
38 $(DIR_OBJS)/%.o :$(DEP_DIR_OBJS) %.c
39     $(CC) -o $@ -c $(filter %.c,$^)
40 $(DIR_DEPS)/%.dep : $(DEP_DIR_DEPS) %.c
41     @echo "Creating $@ ..."
42     @set -e;\
43     $(RM) $(RMFLAGS) [email protected];\
44     $(CC) -E -MM $(filter %.c,$^) > [email protected];\
45     sed 's,\(.*\)\.o[ :]*, objs/\1.o: ,g' < [email protected] > $@ ;\
46     $(RM) $(RMFLAGS) [email protected]
47 clean:
48     $(RM) $(RMFLAGS) $(DIRS)

使用make指令后，提示如下错误：

 

[rts@localhost complicated]$ make
Makefile:20: *** 遗漏分隔符 。 停止。
[rts@localhost complicated]$ vi Makefile
[rts@localhost complicated]$ make
Makefile:20:

原因：错误的makefile文件中表黄的行中，ifeq和后面的“(“号之间没有空格，加入空格后，就可以正常编译了。

造成这种错误的问题在于：在编程语言中，使用if else 分支结构的时候，习惯性的将if和之后的"(" 连接在一起使用，并且检查的时候，不会注意到这些东西。但在makefile文件的编写中，一定不要有这样的错误，不然就会报错的。

 

正确的makefile文件如下所示：

修改后的makefile文件

 1 .PHONY :all clean
 2
 3 MKDIR = mkdir
 4 CC = gcc
 5 RM = rm
 6 RMFLAGS = -rf
 7
 8 DIR_OBJS = objs
 9 DIR_RELEASE = Release
10 DIR_DEPS = deps
11 DIRS = $(DIR_OBJS) $(DIR_RELEASE) $(DIR_DEPS)
12
13 RELEASE =  complicated
14 RELEASE := $(addprefix $(DIR_RELEASE)/,$(RELEASE))
15 SRCS = $(wildcard *.c)
16 OBJS = $(SRCS:.c=.o)
17 OBJS := $(addprefix $(DIR_OBJS)/, $(OBJS))
18 DEPS = $(SRCS:.c=.dep)
19 DEPS := $(addprefix $(DIR_DEPS)/, $(DEPS))
20 ifeq ("$(wildcard $(DIR_OBJS))", "")
21 DEP_DIR_OBJS := $(DIR_OBJS)
22 endif
23 ifeq ("$(wildcard $(DIR_RELEASE))","")
24 DEP_DIR_RELEASE := $(DIR_RELEASE)
25 endif
26 ifeq ("$(wildcard $(DIR_DEPS))", "")
27 DEP_DIR_DEPS := $(DIR_DEPS)
28 endif
29
30 all: $(RELEASE)
31
32 include $(DEPS)
33
34 $(DIRS):
35     $(MKDIR) $@
36 $(RELEASE) :$(DEP_DIR_RELEASE) $(OBJS)
37     $(CC) -o $@ $(filter %.o,$^)
38 $(DIR_OBJS)/%.o :$(DEP_DIR_OBJS) %.c
39     $(CC) -o $@ -c $(filter %.c,$^)
40 $(DIR_DEPS)/%.dep : $(DEP_DIR_DEPS) %.c
41     @echo "Creating $@ ..."
42     @set -e;\
43     $(RM) $(RMFLAGS) [email protected];\
44     $(CC) -E -MM $(filter %.c,$^) > [email protected];\
45     sed 's,\(.*\)\.o[ :]*, objs/\1.o: ,g' < [email protected] > $@ ;\
46     $(RM) $(RMFLAGS) [email protected]
47 clean:
48     $(RM) $(RMFLAGS) $(DIRS)

修改后编译的结果如下：

 

[rts@localhost complicated]$ make
Makefile:32: deps/foo.dep: 没有那个文件或目录
Makefile:32: deps/main.dep: 没有那个文件或目录
mkdir deps
Creating deps/main.dep ...
Creating deps/foo.dep ...
mkdir Release
mkdir objs
gcc -o objs/foo.o -c foo.c
gcc -o objs/main.o -c main.c
gcc -o Release/complicated objs/foo.o objs/main.o
[rts@localhost complicated]$ ls
deps  foo.c  foo.h  main.c  Makefile  objs  Release