Messages in this thread | | | Date | Tue, 23 Sep 2014 00:33:45 +0300 | From | Aaro Koskinen <> | Subject | Re: [PATCH v5 1/1] powerpc/perf: Adjust callchain based on DWARF debug info |
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Hi,
On Wed, Jun 25, 2014 at 08:49:03AM -0700, Sukadev Bhattiprolu wrote: > powerpc/perf: Adjust callchain based on DWARF debug info > > When saving the callchain on Power, the kernel conservatively saves excess > entries in the callchain. A few of these entries are needed in some cases > but not others. We should use the DWARF debug information to determine > when the entries are needed.
This patch breaks perf compilation if DWARF support is not present. DWARF support is auto-detected early in the build, so IMHO either user should be informed to install the needed stuff, or the build should succeed with limited functionality.
arch/powerpc/util/skip-callchain-idx.c:13:19: fatal error: dwarf.h: No such file or directory #include <dwarf.h> ^ compilation terminated.
A.
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