调试 makefile
我有一个 makefile，其中包含如下语句：
TOPICS = dmic
SRV_MODE =
ifeq "$(SRV_FLAG)" "ON"
SRV_MODE = 2
endif
vpath d%_srv.h $(CNT_PATH)
USER_PRE_TARGETS := $(foreach topic,$(TOPICS),$(topic)_srv.h)
dmic_srcs = $(wildcard $(CCWSCA)/dmic/src/*.c) \
$(wildcard $(CCWSCA)/dmic/src/*.ppc)
dmic_srv.h: $(dmic_srcs)
srvgen dmic $(SRV_MODE)
users_topic =
users_topic := $(shell ls -tr $(CCWPA)/$(CCBB)/Makefile.pre* | \
tail -1 | awk 'BEGIN{FS="Makefile.pre."}{printf("%s\n", $$2);}')
USER_PRE_TARGETS := $(foreach topic,$(users_topic),d$(topic)_srv.h)
运行构建后，我收到如下消息：
gmake: Entering directory `/veluser2/vel/abp/bvijays/proj/c9mi790V64OG/cmi9dl'
echo dmic
dmic
srvgen dmic 2
Working on directory : /veluser2/vel/abp/bvijays/bb/cmi9dl/v79_0/dmic/src
Working on directory : /velhome/vel/ccvel/ccvel/bb/cmi9dl/v79_0/dmic/src
foreach: No match.
gmake: *** [ddmic_srv.h] Error 1
gmake: Target `pre' not remade because of errors.
gmake: Leaving directory `/veluser2/vel/abp/bvijays/proj/c9mi790V64OG/cmi9dl'
那么发出的 foreach 命令似乎存在一些问题？ 由于我是这些 makefile 的新手，有人可以建议如何调试 makefile 吗？
I have a makefile which has statements like below:
TOPICS = dmic
SRV_MODE =
ifeq "$(SRV_FLAG)" "ON"
SRV_MODE = 2
endif
vpath d%_srv.h $(CNT_PATH)
USER_PRE_TARGETS := $(foreach topic,$(TOPICS),$(topic)_srv.h)
dmic_srcs = $(wildcard $(CCWSCA)/dmic/src/*.c) \
$(wildcard $(CCWSCA)/dmic/src/*.ppc)
dmic_srv.h: $(dmic_srcs)
srvgen dmic $(SRV_MODE)
users_topic =
users_topic := $(shell ls -tr $(CCWPA)/$(CCBB)/Makefile.pre* | \
tail -1 | awk 'BEGIN{FS="Makefile.pre."}{printf("%s\n", $2);}')
USER_PRE_TARGETS := $(foreach topic,$(users_topic),d$(topic)_srv.h)
After I run the build, I get messages like the ones below:
gmake: Entering directory `/veluser2/vel/abp/bvijays/proj/c9mi790V64OG/cmi9dl'
echo dmic
dmic
srvgen dmic 2
Working on directory : /veluser2/vel/abp/bvijays/bb/cmi9dl/v79_0/dmic/src
Working on directory : /velhome/vel/ccvel/ccvel/bb/cmi9dl/v79_0/dmic/src
foreach: No match.
gmake: *** [ddmic_srv.h] Error 1
gmake: Target `pre' not remade because of errors.
gmake: Leaving directory `/veluser2/vel/abp/bvijays/proj/c9mi790V64OG/cmi9dl'
So it seems like there is some issue with the foreach command issued?
As I am new to these makefiles, could anybody please suggest how to debug the makefile?
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评论（1）
这有点混乱，如果不了解更多关于它运行的环境，就很难诊断。但让我们了解一些基础知识：
dmic_srv.h) 上进行了定义，因此当您运行不带参数的 GNU make 时，它将使用该目标。我怀疑这就是你想要做的事情。但是你正在做代码生成，所以你没问题。=具有延迟求值，但:=强制立即求值。这会影响$(foreach )的运行环境。USER_PRE_TARGETS定义，但切勿在任何地方使用它。 已添加：鉴于所有$(foreach )命令都存在于这些定义中，您可以删除这些命令，看看它是否会变得更好。This is a bit of a mess, and it is hard to diagnose without knowing more about the environment it is running it. But lets go with a few basics:
dmic_srv.h), so when you run GNU make without arguments it will use that target.I doubt that is what you want this to do.but you're doing code generation, so you are OK there.=has lazy evaulation, but:=forces immediate evaluation. This effects the environment in which you$(foreach )'s are running.USER_PRE_TARGETS, but never use it anywhere. Added: Given that the all the$(foreach )commands exist in these definitions, you might just remove these and see if it get better.