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An "-Og" Optimization Level For GCC

Compiler

Published on 03 September 2012 09:56 AM EDT
Written by Michael Larabel in Compiler
3 Comments

Compiler expert Richard Guenther of SUSE proposed introducing an "-Og" optimization level for GCC to enhance the debugging experience.

The -Og compiler optimization flag for the GNU Compiler Collection would be similar to -O1 and be more about enhancing the debug-ability of binaries as opposed to performing optimizations for speed. "This adds a new optimization level, -Og, as previously discussed. It aims at providing fast compilation, a superior debugging experience and reasonable runtime performance...It's a first cut, highlighting that our fixed pass pipeline and simply enabling/disabling individual passes (but not pass copies for example) doesn't scale to properly differentiate between -Og and -O[23]. -O1 should get similar treatment, eventually just building on -Og but not focusing on debugging experience."

While this optimization level was previously discussed amongst developers previously, no GCC developers have yet to comment on the -Og "RFC" that went out last month, so Guenther may end up shelving the idea for GCC 4.8 rather than pushing it into trunk.

The mailing list message concerning GCC -Og can be found on gcc-patches.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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