A GCC Proposal To Build It Better, Faster

[curaga]

"make profiledbuild" has been an option for ages.

[RealNC]

What's the point of it?

No one builds GCC using its default CFLAGS/CXXFLAGS.

Putting -O3, LTO and PGO in defaults will probably result in distros also using them, even if they customize a lot. Especially PGO could improve things a bit.

[birdie]

What's the point of it?

No one builds GCC using its default CFLAGS/CXXFLAGS.

[Ex-Cyber]

But will they also build it harder and stronger?

[gigaplex]

Compilers are deterministic

And test programs compiled with the compilers that were created to show code size and general program performance comparisons. Maybe there are indeed differences when a compiler is built using another compiler

Aside: would be interesting to see how gcc would behave if built with LLVM instead



Michael, what do you think?

If the compilers generate different outputs depending on what compiler they were compiled with, that sounds like a bug. That'd be like a spreadsheet producing different answers depending on what compiler the application was built with.

[DeepDayze]

What if you compile GCC with LLVM and LLVM with GCC lol.

And compile GCC with GCC.
And LLVM with LLVM.

And test programs compiled with the compilers that were created to show code size and general program performance comparisons. Maybe there are indeed differences when a compiler is built using another compiler

Aside: would be interesting to see how gcc would behave if built with LLVM instead



Michael, what do you think?

[uid313]

What if you compile GCC with LLVM and LLVM with GCC lol.

And compile GCC with GCC.
And LLVM with LLVM.

[phoronix]

Phoronix: A GCC Proposal To Build It Better, Faster

There's a proposal within the GCC development camp to change the CFLAGS under which the GNU Compiler Collection is built when in a release mode...

http://www.phoronix.com/vr.php?view=MTEzOTA