Nothing straight forward to do this. You could do any of: 1) Look at the output of make a GHC is compiled. Verify that by and large most lines have '-fllvm' on them. 2) As above but pipe output of building GHC to a file. Grep it later for '-fllvm', you should get a very high count. 3) Add a "-v2" option to the build settings in build.mk, this will give lots and lots of output, showing for example that the various LLVM tools (llc, opt) are being called. 4) temporarily remove the llvm tools (opt, llc) from the command line and verify that building GHC fails pretty quickly.
I'd say 2 is the best bet. However, if you chose "perf-llvm" as your build setting and GHC built, you built GHC with LLVM. Cheers, David On 12 February 2013 10:13, Magicloud Magiclouds <magicloud.magiclo...@gmail.com> wrote: > Thank you for the replies. These are what I got, correct me if I am wrong: > > If I want to build ghc executables and standard libraries, all I need is to > set perf-llvm. > And set perf-llvm or not does not effect the ability of ghc to use llvm. > > Then how to check if the output files (executables, libraries) are generated > by llvm, instead of gcc? In other words, to see if llvm was used correct. > > > On Wed, Feb 13, 2013 at 1:09 AM, Brandon Allbery <allber...@gmail.com> > wrote: >> >> On Tue, Feb 12, 2013 at 11:41 AM, Magicloud Magiclouds >> <magicloud.magiclo...@gmail.com> wrote: >>> >>> Then I `mv build.mk.sample build.mk`, set "BuildFlavour = perf-llvm", >>> add "GhcWithLlvmCodeGen = YES". Finally `./configure >>> --with-gcc=/usr/bin/llvm-gcc`. Configure output attached. >>> >>> After make, I tried `inplace/bin/ghc-stage2 �Cinfo`, it is still using >>> native code generator. What should I do? >> >> >> 1. I think --with-gcc= is independent of the llvm code generator. >> 2. Building the llvm codegen does not necessarily make it the *default* >> codegen; I think native remains default. I don't know if there's a way to >> specify that llvm should be the default code generator. >> >> fwiw, the ghc I have on here does not mention llvm in ghc --info, but ghc >> -fllvm at least tries to work. >> >> -- >> brandon s allbery kf8nh sine nomine >> associates >> allber...@gmail.com >> ballb...@sinenomine.net >> unix, openafs, kerberos, infrastructure, xmonad >> http://sinenomine.net > > > > > -- > 竹密岂妨流水过 > 山高哪阻野云飞 > > And for G+, please use magiclouds#gmail.com.
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