On 01.07.22 07:38, Chris Johns wrote:
If this enable is specific to GCC's gcov then maybe we should clearly label it
as that and avoid overloading the term and any possible confusion that might
bring. For example RTEMS_GCOV_CONVERGE?
It is not per se specific to GCC. Maybe we should name it
RTEMS_COVERAGE_INSTRUMENTATION.
What if another approach to instrumented coverage is developed?
Why the reluctance to RTEMS_GCOV_COVERAGE? I like it because it is direct.
Ok, I rename it to RTEMS_GCOV_COVERAGE.
The user can fine tune the build through the
LIBRARY_OPTIMIZATION_FLAGS, TEST_OPTIMIZATION_FLAGS, and
COVERAGE_COMPILER_FLAGS,
COVERAGE_LINKER_FLAGS options.
How would the LTO fat options be added? Would the pattern for
COVERAGE_COMPILER_FLAGS flags be copied to add LTO_COMPILER_FLAGS?
Do you have to specify the compiler flags also during linking if you use LTO?
You add `-flto -ffat-lto-objects` to build the object files so they then contain
the data the lto pass in the linker needs to optimise across the object files.
The COVERAGE_LINKER_FLAGS are for the linking step. Are you required to
pass the compiler flags during linking if you use LTO?
I am encouraged by some of the generated code I have reviewed. I like what it
does.
I am a little lost with the difference between LIBRARY_OPTIMIZATION_FLAGS and
OPTIMIZATION_FLAGS? RTEMS is always a library so what is difference between
them? Are the OPTIMIZATION_FLAGS the "-O" ones and still something I can set
from an INI file?
Currently the OPTIMIZATION_FLAGS are used for all code (code for libraries and
code for tests). With this change you can build the libraries with -O0 and the
tests with -O2 for example.
Oh so if I understand this the LIBRARY_OPTIMIZATION_FLAGS are per library?
Not per library, the LIBRARY_OPTIMIZATION_FLAGS are used for all
libraries in bsps and cpukit.
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