An error message for compling ARM-elf-gcc/g++

sybaselu

Hi guys
   I am currently busy in Embeded-Linux ,So the enviroment of my development is that:
complier:arm-elf-gcc/g++
debug   :arm-elf-gdb
(and so on)
target  :based-ARM for uClinux OS
Well, this is scrath of my source code:

#define USB_MODULE_INIT(module)      \
    extern "C" void USB_##module##_ForceStaticLink() { }  //I do not know what's this mean

I can not complied throungh here, since that the "syntax error before `#' " appear , I do not know what's this mean ?

sybaselu

用的是arm-elf-g++(是C++ )交叉编译器，但在源码中出现两次宏定义如：
extern "C" void USB_##module##_ForceStaticLink() { }
而arm-efl-g++报错，原因何在？

bookstack

可以看一下宏是怎么展开的：
gcc -E foo.c
就知道问题在哪里了。

bookstack

可以看一下宏是怎么展开的：
gcc -E foo.c
就知道问题在哪里了。