[LLVMdev] GCC compatibility code coverage issue .

[Umesh Kalappa]

Hi Justin ,

Thank you for the reply,but without version too ,the llvm-cov fails i.e

bash-4.1$ clang -fprofile-arcs -ftest-coverage test.c
bash-4.1$ ./a.out
bash-4.1$ llvm-cov gcov test.c
Unexpected number of edges (in main).
Invalid .gcda File!

bash-4.1$ clang -g -O0 -fprofile-arcs -ftest-coverage -Xclang
-coverage-cfg-checksum -Xclang -coverage-no-function-names-in-data
test.c
bash-4.1$ ./a.out
bash-4.1$ llvm-cov gcov test.c
Unexpected end of memory buffer: 386832052.
Invalid .gcno File!

bash-4.1$ clang -v
clang version 3.6.0 (tags/RELEASE_360/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix

Thank you
~Umesh

On Tue, Apr 28, 2015 at 8:32 PM, Justin Bogner <justin at justinbogner.com> wrote:
>
> On Tuesday, April 28, 2015, Umesh Kalappa <umesh.kalappa0 at gmail.com> wrote:
>>
>> Hi All,
>>
>> We trying  to use clang+llvm to generate the gcc  coverage format as
>>
>> clang version 3.6.0
>>
>> $clang  --coverage -Xclang -coverage-cfg-checksum -Xclang
>> -coverage-no-function-names-in-data -Xclang -coverage-version='407*'
>> test.c
>>
>> $a.out
>>
>> $llvm-cov gcov test.gcda
>>
>> Unexpected version: *704.
>> Invalid .gcno File!
>
>
> The llvm-cov tool supports the 402* format, which is what clang emits by
> default. If you remove the -Xclang arguments from your compilation it should
> work.
>
>>
>> Debugging the above cause ,But any hints from experts here ,will help a
>> lot .
>>
>> Appreciate your time ,Thank you
>> ~Umesh
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