[LLVMdev] [cfe-dev] RFC: Upcoming Build System Changes
daniel at zuster.org
Fri Oct 28 14:16:40 PDT 2011
On Fri, Oct 28, 2011 at 2:12 PM, Christopher Jefferson
<chris at bubblescope.net> wrote:
> On 28 Oct 2011, at 18:26, Daniel Dunbar wrote:
>> On Fri, Oct 28, 2011 at 9:56 AM, Óscar Fuentes <ofv at wanadoo.es> wrote:
>>> You guys are mixing several things on the discussion. What Dan proposed
>>> makes no difference for Xcode. If it speeds up the Makefile-based build
>>> (something I doubt) that's good, but it is unnecessary for that system
>>> to fiddle with the cmake build as long as cmake can deal with the
>>> changes on its own.
>> My proposal makes it relatively easy for a motivated engineer to
>> generate "clean" Xcode projects for LLVM.
> Couldn't a similarly motivated engineer work on greatly improving the "clean" Xcode projects for cmake in general?
> My personal main experience of a similar system is 'boost::build', or bjam, the build system used for the C++ boost libraries.
> This has slowly grown in scope, and I find completely unusable. It makes simple using boost, or configuring it slightly non-standardly, almost impossible without asking on IRC or mailing lists. bjam is the sole reason I have not submitted significant code to boost.
> Do not underestimate the benefit of hundreds of webpages written about CMake and make, detailing their nastier features. Where will your system's nastier features be documented?
> Sorry to sound negative, but I really don't want to have to learn yet another build system.
You don't. Nothing about what I am proposing changes how you build LLVM.
> One point which I didn't find answered, for casual developers.
See my original post, at the bottom.
> I currently do a bit of bug-finding on clang and libc++. All I am interested in is statements around the complexity of:
> CXX=g++4-.6 ./configure --prefix=/llvm --enable-expensive-checks; make -j8; make install
> Will that change at all?
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