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llvmCore for the iOS Simulator.


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and not just for Debug+Asserts builds.


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who knows how to cover Asserts or Debug separately
please do not hesitate to extend this

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builds to "Release".  The default build is unchanged (optimization on,
assertions on), however it is now called Release+Asserts.  The intent
is that future LLVM releases released via llvm.org will be Release builds
in the new sense, i.e. will have assertions disabled (currently they have
assertions enabled, for a more than 20% slowdown).  This will bring them
in line with MacOS releases, which ship with assertions disabled.  It also
means that "Release" now means the same things in make and cmake builds:
cmake already disables assertions for "Release" builds AFAICS.


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cross-build Makefile needs to unset CFLAGS/CXXFLAGS when building the build-side utilities since the flags will be for the cross-compiler.

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--enable-shared is passed to configure.


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the examples shared to make sure the shared library keeps working.


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--enable-shared configure flag to have the tools linked shared. (2.7svn is just
$(LLVMVersion) so it'll change to "2.7" in the release.)  Always link the
example programs shared to test that the shared library keeps working.

On my mac laptop, Debug libLLVM2.7svn.dylib is 39MB, and opt (for example) is
16M static vs 440K shared.

Two things are less than ideal here:
1) The library doesn't include any version information. Since we expect to break
the ABI with every release, this shouldn't be much of a problem. If we do
release a compatible 2.7.1, we may be able to hack its library to work with
binaries compiled against 2.7.0, or we can just ask them to recompile. I'm
hoping to get a real packaging expert to look at this for the 2.8 release.
2) llvm-config doesn't yet have an option to print link options for the shared
library. I'll add this as a subsequent patch.


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Don't build examples by default, use BUILD_EXAMPLES=1 to build them. The only utility of this is testing that we keep the examples up to date, I will just make the buildbots run with this flag.

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apply to the build tools. If we want to allow build tool flags input, we
should have separate inputs (BUILD_CFLAGS and BUILD_CXXFLAGS, perhaps).

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direct inclusion edge from System to Support.


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Now with Clang-compatibility.


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breaking Clang's Apple-style build.

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Thanks to Chris for heads-up!

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too.


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 - 'make unittests' still builds and tests.
 - 'make unitcheck' inside a unittest directory runs the tests in that directory.

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 - 'make unittests' still builds and tests.
 - 'make unitcheck' inside a unittest directory runs the tests in that directory.

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--build=triple and other configure options are passed
to the BuildTools/ sub-invocation more consistently


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