-fprofile-generate

[Nathan Sidwell]

Rajkishore Barik wrote:
> Hi,
> I made some changes to libgcov.c and gcov-io.h by adding a new function 
> named "__gcov_merge_range".
> GCC compiles successfully without any error/warning.
> However, when I run any sample c program(x.c) using the following command 
> "gcc -fprofile-generate x.c", it says 
> undefined reference to "__gcov_merge_range" in the linking phase  and it 
> does not produce x.gcda file. 
> I also tried compiling and linking separately using "-fprofile-generate". 
> All the time I get this error.
> Can someone help?
> regards,
> Raj
You'll need to modify libgcc.mk (IIRC) to compile libgcov.c with
the correct #define enabled.  Look at how the other merge functions are
done.

nathan
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