Ubuntu
dpkg package

Revert back frame pointers for ppc64el (remove -fno-omit-framepointer)

Bug #2064539 reported by Frank Heimes
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The Ubuntu-power-systems project
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dpkg (Ubuntu)
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glibc (Ubuntu)
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Bug Description

Power's Linux ABIs all require an explicit call chain be stored on the call stack frames which are all accessible via the stack pointer.
Therefore, having a (soft/simulated) frame pointer does not improve backtraces at all on Power.

However, forcing a frame pointer via the -fno-omit-frame-pointer option negatively affects performance for multiple reasons: extra prologue/epilogue overhead and fewer shrink-wrapping opportunities.
Given -fno-omit-frame-pointer does not provide any improvements (backtraces or otherwise) and only reduces performance, -fno-omit-frame-pointers should not be used on Power.

Tags: ppc64el
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