Question

为什么我在此代码中出现依赖项丢弃错误？

里面一定有问题，但我找不到这个问题！这里我有自动依赖生成器。这里我有自动依赖生成器。没有最后一行：

-include $(DEPFILES)

运行正常。但是当这段代码存在时，它会给我错误。

请避免因为类似的警告信息而链接到其他问题。他们的情况不同。

输出：

bash ./scripts/outputs.bash
bash ./scripts/simulator_outputs.bash
make: Circular /usr/include/c++/4.8/iostream <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/ostream <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/ios <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/iosfwd <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/cwchar <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/exception <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/clocale <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/cctype <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/string <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/new <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/basic_string.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/locale_classes.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/streambuf <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/streambuf.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/cwctype <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/locale_facets.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/basic_ios.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/ostream.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/istream <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/bits/istream.tcc <- bin/sim dependency dropped.
make: Circular /usr/include/c++/4.8/cmath <- bin/sim dependency dropped.
make: `VARLISTS' is up to date.

生成文件：

SOURCES := test.cpp
OUTDIR:= ./out
BINDIR:= ./bin
OBJDIR:= ./bin/obj
OBJECTS := $(addprefix $(OBJDIR)/,$(SOURCES:.cpp=.o))
DEPFILES:= $(OBJECTS:.o=.d)
VARLISTS:= ./app/outputs.list
CXX := g++
CXXFLAGS := -c -g -MD -MP

# default
%: VARLISTS $(BINDIR)/sim
    @

VARLISTS:
    bash ./scripts/outputs.bash
    bash ./scripts/simulator_outputs.bash

$(BINDIR)/sim: $(OBJECTS)
    $(CXX) $(LDFLAGS) $^ -o $@

$(OBJDIR)/%.o: %.cpp
    @if [ ! -d "$(OBJDIR)" ]; then mkdir -p $(OBJDIR) && echo "$(OBJDIR) directory created: $(OBJDIR)";  fi
    $(CXX) $(CXXFLAGS) -MF $(OBJDIR)/$*.d -o $@  $<

-include $(DEPFILES)

Answer 1

问题是%: VARLISTS $(BINDIR)/sim行。

该行是match-anything rule，因此匹配所有目标。因此$(BINDIR)/sim依赖的所有内容（没有其他目标）也将（循环地）依赖于$(BINDIR)/sim文件/目标。

使循环依赖性被删除（取决于执行文件？）

1 个答案: