我怎样才能让 make 将二进制文件放在不同的位置？
简短而简单的问题，但我似乎在这里遇到了写作障碍：
假设我在与用于构建程序的 makefile 相同的目录中有一个源代码文件：
confus@confusion:~/prog$ ls
binaries includes main.c Makefile
How do I get make to put the binaries for my main.c 在 binaries 目录中？然后，在第二次运行时， make 应该像平常一样查看二进制文件是否是最新的（并且不要再次编译它）。
我的想法是这样的：
# Makefile
.PHONY: all
SOURCES := $(wildcard *.c)
TARGETS := $(subst %.c,binaries/%.o,$(SOURCES))
all:$(TARGETS)
$(TARGETS):$(SOURCES)
./compile "$(subst .o,.c,$(@F))" -o "$@"
Short and easy question, but I seem to have a writer's block here:
Suppose I have a source code file in the same directory as the makefile I use to build the program:
confus@confusion:~/prog$ ls
binaries includes main.c Makefile
How do I get make to put the binaries for my main.c in the binaries dir? Afterwards on a second run make should see if the binary file there is up to date (and don't compile it again) just like normal.
My thought was something like this:
# Makefile
.PHONY: all
SOURCES := $(wildcard *.c)
TARGETS := $(subst %.c,binaries/%.o,$(SOURCES))
all:$(TARGETS)
$(TARGETS):$(SOURCES)
./compile "$(subst .o,.c,$(@F))" -o "$@"
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评论（1）
不要说所有目标都依赖于所有源，而是有一个模式规则，
您可能还需要使用 vpath
修订：
你的替代品也有问题...
这个测试有效（只是为了编译单独的 .o 文件，您仍然需要链接它们，这将是一个非常简单的规则）
Don't say all targets depend on all sources, instead have a pattern rule
you may also need to use a vpath
Revised:
You also had a problem with your subst ...
this test worked (just for compiling individual .o files, you still need to link them, which would be a very simple rule)