阻止makefile中的变量扩展

Question

I want to write this into a file:

-MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"

but when I echo this into a file, with "" , or '' , the variables will expand, how can I prevent the expansion and write it as is?

PS echo '-MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"' is called in a makefile.

in my makefile, I let's say I have:

all:
    echo '-MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"' > $file

what I see in the file is

-MF"all" -MT"all" -o "all" ""

Answer 1

Use $$ to put a dollar sign into a Makefile recipe

all:
    echo '-MF"$$(@:%.o=%.d)" -MT"$$(@)" -o "$$@" "$$<"' > $file