Question

我有一个包含以下内容的makefile：

OSM_BUNDLER_DEP_DIR=osm-bundler-read-only/osm-bundler/software
OSM_BUNDLER_DEPS=$(OSM_BUNDLER_DEP_DIR)/pmvs/bin/pmvs2
CMVS_DIR=CMVS-PMVS/build/main
PMVS_EXE=$(CMVS_DIR)/pmvs2
OSM_BUNDLER_PMVS_DIR=$(OSM_BUNDLER_DEP_DIR)/pmvs/bin

all: $(OSM_BUNDLER_DEPS)

$(OSM_BUNDLER_PMVS_DIR)/pmvs2: $(PMVS_EXE) $(OSM_BUNDER_PMVS_DIR)
    cp $(PMVS_EXE) $(OSM_BUNDLER_PMVS_DIR)

$(OSM_BUNDLER_PMVS_DIR): $(OSM_BUNDLER_DEP_DIR)
    mkdir -p $(OSM_BUNDLER_PMVS_DIR)

$(OSM_BUNDLER_DEP_DIR): osm-bundler-read-only
    mkdir osm-bundler-read-only/osm-bundler/software

osm-bundler-read-only:
    svn checkout http://osm-bundler.googlecode.com/svn/trunk/ osm-bundler-read-only

我希望make能够识别$（PATH_TO_ANOTHER_DIRECTORY）必须存在才能执行$(PATH_TO_ANOTHER_DIRECTORY)/subpackage的配方。相反，它会尝试执行规则$(PATH_TO_ANOTHER_DIRECTORY)的配方，而不先执行$(PATH_TO_ANOTHER_DIRECTORY)的配方，从而导致错误。有趣的是，我可以执行规则来手动创建目录，一切正常：

me@localhost:~/workdir> # make does not recognize dependency
me@localhost:~/workdir> make
cp CMVS-PMVS/build/main/pmvs2 osm-bundler-read-only/osm-bundler/software/pmvs/bin
cp: cannot create regular file ‘osm-bundler-read-only/osm-bundler/software/pmvs/bin’: No such file or directory
make: *** [osm-bundler-read-only/osm-bundler/software/pmvs/bin/pmvs2] Error 1
me@localhost:~/workdir> # Specifying the dependency works
me@localhost:~/workdir> make osm-bundler-read-only/osm-bundler/software/pmvs/bin
mkdir -p osm-bundler-read-only/osm-bundler/software/pmvs/bin
me@localhost:~/workdir> # Now it executes fine
me@localhost:~/workdir> make
cp CMVS-PMVS/build/main/pmvs2 osm-bundler-read-only/osm-bundler/software/pmvs/bin

我做错了什么？

除非手动指定，否则Makefile不会创建依赖项

0 个答案: