Makefile错误 - “***缺少分隔符”＆amp; “***食谱在第一个目标之前开始”

Question

我正在尝试为os161构建用户空间。当我在命令行中输入make时，我收到以下错误：

  

Makefile 24：***缺少分隔符（你的意思是TAB而不是8个空格？）。停止。

我在第24行检查了Makefile，并尝试在行的开头添加一个TAB，但这不起作用，因为我得到另一个错误：

  

Makefile 24：***食谱在第一个目标之前开始。停止。

以下是完整的makefile供参考：

#
# Toplevel makefile for OS/161.
#
#
# Main rules:
#    all (default):  depend and compile system; install into staging area
#    rebuild:        likewise, but start with a clean slate.
#    fullrebuild:    likewise, but start with a very clean slate.
#
# What all does, in order:
#    tools:          depend and compile the tools used in build.
#    includes:       install header files.
#    build:          depend and compile the system.
#
# Other targets:
#    depend:         just update make dependency information.
#    tags:           generate/regenerate "tags" files.
#    install:        install into $(OSTREE).
#    clean:          remove generated files.
#    distclean:      remove all generated files.
#

TOP=.
.include "$(TOP)/mk/os161.config.mk"

all:;  # make this first

MKDIRS=$(OSTREE)

.include "$(TOP)/mk/os161.mkdirs.mk"

all: tools .WAIT includes .WAIT build

rebuild:
    $(MAKE) clean
    $(MAKE) all

fullrebuild:
    $(MAKE) distclean
    $(MAKE) all

# currently no tools required, hence no tools/ dir or work to do
tools:
    @true

build:
    (cd userland && $(MAKE) build)
    (cd man && $(MAKE) install-staging)
    (cd testscripts && $(MAKE) build)

includes tags depend:
    (cd kern && $(MAKE) $@)
    (cd userland && $(MAKE) $@)

clean:
    (cd kern && $(MAKE) $@)
    (cd userland && $(MAKE) $@)
    rm -rf $(INSTALLTOP)

distclean: clean
    rm -rf $(WORKDIR)

install: $(OSTREE)
    (cd $(INSTALLTOP) && tar -cf - .) | (cd $(OSTREE) && tar -xvf -)


.PHONY: all rebuild fullrebuild tools build includes tags depend
.PHONY: clean distclean

# old BSD name, same as distclean
cleandir: distclean
.PHONY: cleandir

问题（24）是：

.include "$(TOP)/mk/os161.config.mk"

任何帮助将不胜感激。我检查了类似的makefile错误，但我似乎无法找到错误。

Answer 1

分隔符是<TAB>。请不要在Makefile的Make行中使用空格，Makefile.in ...

段：

21  #
22  
23  
24  TOP=.
25  
26  all:;  # make this first
27  
28  MKDIRS=$(OSTREE)
29  
30  <TAB>include "$(TOP)/mk/os161.mkdirs.mk"
31  
32  all: tools .WAIT includes .WAIT build
33  
34  rebuild:
35  <TAB>$(MAKE) clean
36  <TAB>$(MAKE) all
37  
38  <TAB>fullrebuild:
39  <TAB>$(MAKE) distclean
40  <TAB>$(MAKE) all

Answer 2

仔细阅读documentation of GNU make，特别是include directive。

您

.include "$(TOP)/mk/os161.config.mk"

（错误地）请求包含一个路径以双引号开头的文件（你可能没有，所以include失败了......）

你想要

-include $(TOP)/mk/os161.config.mk

该行以减号或破折号开头，而不是点。

请务必使用保持 tab 字符的编辑器。

BTW，FreeBSD make接受带有起始点的.include指令，并希望使用双引号的路径。