make error with --with-arch=rv32imcf

[YuHungChou]

Hi, I'm trying to build the compiler with --with-arch=rv32imcf, but I get the error. (Platform: pulpissimo)

I use the following code:
void test_floating() { float i, j; i = 0.6; j = 0.7; j = j + i; }
Dump this to assembly code, I can't find floating point instruction.
Do I miss some configuration about this compiler or pulp-sdk?

Thanks in advance.