Enable LLDB by default on platforms where we build Clang
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Authored by emaste on Dec 17 2013, 7:54 PM.

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jhb
gnn

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Check that lldb is built if no WITH_ or WITHOUT_ in src.conf

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Rebase and enable for arm64 as well

Herald added a subscriber: bdrewery. · View Herald TranscriptOct 20 2015, 8:46 PM

Will be nice to get more platforms on the default yes list. :)

This revision is now accepted and ready to land.Oct 20 2015, 9:17 PM

imp added a subscriber: imp.Oct 20 2015, 9:34 PM

imp added inline comments.

share/mk/src.opts.mk
249	I'dd add LLDB to DEFAULT_YES options unconditionally. And I'd change this .if to to be the contrapositive of the one on line 241.

emaste added inline comments.Oct 20 2015, 9:37 PM

share/mk/src.opts.mk
249	I think we can instead enable LLDB by default on the same platforms that build Clang by default (i.e., i386, amd64, arm, powerpc)

On 32- and 64-bit x86, arm, and powerpc we build Clang by default. Build LLDB by default on these as well.

This revision now requires review to proceed.Oct 20 2015, 10:06 PM

For reference, times from a few test builds:

make -j16                                          buildworld  12448.13s user 2164.26s system 1249% cpu 19:29.06 total
make -j16 WITH_DEBUG_FILES=yes                     buildworld  12860.29s user 2484.72s system 1285% cpu 19:53.55 total
make -j16                         WITH_LLDB=yes    buildworld  13638.69s user 2472.67s system 1296% cpu 20:42.47 total
make -j16 WITH_DEBUG_FILES=yes    WITH_LLDB=yes    buildworld  13992.22s user 2526.42s system 1306% cpu 21:04.76 total
make -j16 WITHOUT_DEBUG_FILES=yes WITHOUT_LLDB=yes buildworld  12557.10s user 2479.58s system 1260% cpu 19:53.12 total

For now just explicitly default LLDB to YES on arm/arm64/amd64, and NO elsewhere.

I would like to build it in those cases where clang is /usr/bin/cc, but it's not yet usable for live debugging on i386 so there's no point in enabling it there yet. We could use BROKEN_OPTIONS to disable it on i386, but that's not quite right: it will build on i386, and can debug core files from other architectures or connect to remote targets.

gnn accepted this revision.Dec 16 2015, 3:18 PM

gnn added a reviewer: gnn.

This revision is now accepted and ready to land.Dec 16 2015, 3:18 PM