使錯誤的路徑，與「沒有規則制定目標」失敗

Question

我試圖從源代碼構建trace-cmd.git;最糟糕的是，我已經在同一臺機器上建立過一次，成功;但是沒有留下任何註釋，也不能說出在此期間發生了什麼。

所以現在我試圖重建，我也得到了可怕的：

trace-cmd$ make 
make: *** No rule to make target `/media/disk/trace-cmd/event-parse.c', needed by `event-parse.o'. Stop. 

好吧，讓我們來看看調試說：

trace-cmd$ make -d 
... 
    Successfully remade target file `trace_python_dir'. 
    Pruning file `tc_version.h'. 
    Considering target file `libparsevent.a'. 
     Considering target file `event-parse.o'. 
     Pruning file `/media/disk/src/trace-cmd/event-parse.c'.  ## THIS EXISTS! 
     Pruning file `.event-parse.d'. 
     Considering target file `/media/disk/trace-cmd/event-parse.c'. ## THIS DOESN'T??? 
     File `/media/disk/trace-cmd/event-parse.c' does not exist. 
     ... 
      Trying pattern rule with stem `event-parse.w'. 
      Trying implicit prerequisite `/media/disk/trace-cmd/SCCS/s.event-parse.w'. 
     Trying pattern rule with stem `event-parse'. 
     Rejecting impossible implicit prerequisite `/media/disk/trace-cmd/event-parse.w'. 
     No implicit rule found for `/media/disk/trace-cmd/event-parse.c'. 
     Finished prerequisites of target file `/media/disk/trace-cmd/event-parse.c'. 
     Must remake target `/media/disk/trace-cmd/event-parse.c'. 
make: *** No rule to make target `/media/disk/trace-cmd/event-parse.c', needed by `event-parse.o'. Stop. 

OK，這是怎麼回事？當然實際文件存在：

trace-cmd$ ls -la /media/disk/src/trace-cmd/event-parse.c 
-rw-r--r-- 1 user user 121563 2013-03-20 19:03 /media/disk/src/trace-cmd/event-parse.c 

...但這是/media/disk/src/trace-cmd/event-parse.c !!並且：

• make已經發現它一次;
• 尚未make決定，出於某種原因，從路徑刪除/src/，

...這顯然文件不存在：

trace-cmd$ ls /media/disk/trace-cmd/event-parse.c 
ls: cannot access /media/disk/trace-cmd/event-parse.c: No such file or directory 

有人能解釋我， make有什麼可能的原因決定放棄一部分路徑，使它找不到一個文件，它最初有一個正確的參考？

Answer 1

明白了 - 想我會專注於.event-parse.d文件：

trace-cmd$ head -n 4 .event-parse.d 
event-parse.o: /media/disk/trace-cmd/event-parse.c \ 
/usr/include/stdio.h /usr/include/features.h /usr/include/bits/predefs.h \ 
/usr/include/sys/cdefs.h /usr/include/bits/wordsize.h \ 
/usr/include/gnu/stubs.h /usr/include/gnu/stubs-32.h \ 

......而事實上，這是錯誤的路徑有...如果我刪除此文件.d會發生什麼？

trace-cmd$ rm .event-parse.d 
trace-cmd$ make 
    COMPILE FPIC   event-parse.o 
make: *** No rule to make target `/media/disk/trace-cmd/trace-seq.c', needed by `trace-seq.o'. Stop. 

哦，我的。必須有更多的人：

trace-cmd$ ls .*.d 
.event-parse.d  .plugin_kmem.d   .trace-filter.d  .trace-options.d .trace-seq.d 
.kbuffer-parse.d .plugin_kvm.d   .trace-ftrace.d  .trace-output.d  .trace-split.d 
.kernel-shark.d  .plugin_mac80211.d  .trace-graph.d  .trace-plot-cpu.d .trace-stack.d 
... 

......事實上，有;顯然緩存來自以前編譯的文件，其中的確是我編譯在另一個目錄中。如果我全部刪除它們：

trace-cmd$ rm .*.d 
trace-cmd$ make 
... 
gcc --shared event-parse.o trace-seq.o parse-filter.o parse-utils.o trace-util.o trace-input.o trace-ftrace.o trace-output.o trace-recorder.o trace-restore.o trace-usage.o trace-blk-hack.o kbuffer-parse.o ctracecmd_wrap.o -o ctracecmd.so 
Note: to build the gui, type "make gui" 
     to build man pages, type "make doc" 

那麼，看似工作;我又回到了高興:)
乾杯！