# build system

Simon Peyton Jones simonpj at microsoft.com
Tue Jul 21 20:21:06 UTC 2015

```Friends
With the new build system I get this kind of output

HC [stage 1] compiler/stage2/build/CmmContFlowOpt.o

HC [stage 1] compiler/stage2/build/CmmImplementSwitchPlans.o

AR libraries/Cabal/Cabal/dist-install/build/libHSCabal-1.23.0.0-752LrSyTT7YLYxOzpNXfM5.a

C:\fp\HP-2014-2.0.0.0\mingw\bin\ar.exe: creating libraries/Cabal/Cabal/dist-install/build/libHSCabal-1.23.0.0-752LrSyTT7YLYxOzpNXfM5.a

LD libraries/Cabal/Cabal/dist-install/build/HSCabal-1.23.0.0-752LrSyTT7YLYxOzpNXfM5.o

HC [stage 1] utils/ghc-cabal/dist-install/build/Main.o

WARNING: file compiler\specialise\Specialise.hs, line 724
But I have no idea which module caused the WARNING, nor do I have a command-line to copy/paste to reproduce it.  (With the old module-at-a-time system I could copy/paste the command line for the specific module.)
Is there a way to

*        make things sequential so I can tell which warnings from which module

*        get a command line to copy/paste to compile that module?
Thanks
Simon
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