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Altera_Forum
Honored Contributor I
731 Views

How use altera_avalon_fifi_xxx with a .cpp file ?

Hi, 

I try to use altera_avalon_fifo_init() function in .cpp file extension. 

The compilation is OK but the linker does't find the function defined in bsp (in library libhal_bsp.a). The error is : 

c:\dev\e111\fpga\fit\software\test06/other1.cpp:9: undefined reference to `altera_avalon_fifo_init(unsigned long, unsigned long, unsigned long, unsigned long)' 

 

But, when I rename the file with .c extension, all is ok. 

Is it possible to use altera_avalon_fifo_init() (or any functions in BSP) into .cpp file ? 

 

I use Eclipse Indigo. My project is created with "Nios II Application and BSP from Template" 

 

Best regards 

Eric
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2 Replies
Altera_Forum
Honored Contributor I
45 Views

I remember that if you define a function (i.e. testcpp() ) in a cpp file, you must declare it with the extern "C" directive in order to call it from a .c files. 

 

extern "C" int testcpp (int n); 

int testcpp (int n) 

/* function body */ 

 

I think you must use something similar for calling .c functions from .cpp source files.
Altera_Forum
Honored Contributor I
45 Views

Hi Cris72, 

Thanks a lot. Now all is OK. 

Best regards 

Eric
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