GCC FDO

[Provoni]

How does one get the feedback-directed optimization (FDO) flags to work with FreeBASIC programs?

The flags are:

Code: Select all

-fprofile-generate
-fprofile-use

The flag -fprofile-generate should be used first but it throws a bunch of errors:

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Program2.o:fake:(.text+0x15): undefined reference to `__gcov_indirect_call_profiler_v2'
Program2.o:fake:(.text+0x37): undefined reference to `__gcov_time_profiler'
Program2.o:fake:(.text+0xc6): undefined reference to `__gcov_indirect_call_profiler_v2'
...

[MrSwiss]

Do you have the profiler (gprof) installed?

[fxm]

'gprof.exe' is in the 'bin' directory of all official releases, but not in the daily St_W build.

[Provoni]

Do you have the profiler (gprof) installed?

Not sure what you mean with installed but gprof.exe is in the win64 bin directory.

[fxm]

? :
-Wc -fprofile-generate
see Compiler Option: -Wc

[Provoni]

? :
-Wc -fprofile-generate
see Compiler Option: -Wc

Yes, -Wc -fprofile-generate.