如何撤消中间文件删除

Question

我有一个软件堆栈,可以创建一些中间文件作为构建过程的一部分.出现了一些问题,构建中断了.我想看看那些中间生成的文件.令我惊讶的是,这些文件正在作为构建过程的一部分被删除.

Removing intermediate files...
rm fact_test_without_proxies.c fact_test_main.c fact_test_without_proxies.o

我浏览了Makefiles我没有看到删除它们的任何明确规则.可以有任何隐式规则来删除中间文件.如果是,我如何禁用这些隐式规则？

Removing intermediate files...只有在使用--debug选项执行make时才会看到打印.

skmt@tux:~/coding/factorial/ut$ make --debug
GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-pc-linux-gnu
Reading makefiles...
Updating goal targets....
 File `check' does not exist.
   File `test_dept_run' does not exist.
     File `fact_test' does not exist.
       File `fact_using_proxies.o' does not exist.
           File `fact_test_without_proxies' does not exist.
            File `fact_test_without_proxies.o' does not exist.
             File `fact_test_without_proxies.c' does not exist.
              File `fact_test_main.c' does not exist.
             Must remake target `fact_test_main.c'.
nm -p fact_test.o | build_main_from_symbols >fact_test_main.c
             Successfully remade target file `fact_test_main.c'.
            Must remake target `fact_test_without_proxies.c'.
cp fact_test_main.c fact_test_without_proxies.c
            Successfully remade target file `fact_test_without_proxies.c'.
           Must remake target `fact_test_without_proxies.o'.
gcc  -I../src  -c -o fact_test_without_proxies.o fact_test_without_proxies.c
           Successfully remade target file `fact_test_without_proxies.o'.
          Must remake target `fact_test_without_proxies'.
gcc   fact_test_without_proxies.o fact.o fact_test.o   -o fact_test_without_proxies
fact.o: In function `unknown':
fact.c:(.text+0x67): undefined reference to `do_update'
collect2: ld returned 1 exit status
make: *** [fact_test_without_proxies] Error 1
Removing intermediate files...
rm fact_test_without_proxies.c fact_test_main.c fact_test_without_proxies.o

Answer 1

如果您使用的是GNUMake,则可以使用特殊目标.PRECIOUS:

.PRECIOUS: fact_test_without_proxies.c fact_test_main.c fact_test_without_proxies.o

要不就

.PRECIOUS: %.c %.o

它的唯一作用是,如果Make被杀死或中断,这些文件将不会被删除.

Answer 2

您也可以使用.SECONDARY,它将保留指定的文件,即使构建没有中断.

例如

 .SECONDARY:

Answer 3

目标的使用受到限制,这会影响.PRECIOUS的行为:

我有目标A /%.foo:和B /%.foo :,所以我设置了:

.PRECIOUS: %.foo

这没用; 我不明白为什么,但扩张不这样做; 我必须完全按照它们的写法明确列出目标:

.PRECIOUS: A/%.foo B/%.foo

但即使在阅读https://www.gnu.org/software/make/manual/html_node/Special-Targets.html之后,我也不明白.PRECIOUS:和.SECONDARY:之间的区别.

可以接受使用那些没有依赖的特殊目标,但我认为这将是非常脏的编码并且会产生副作用.有些人只是把.PRECIOUS:或.SECONDARY:没有dep,后来,他们抱怨说他们必须在破坏构建后运行make clean ...