On Sat, Jun 13, 2015 at 9:44 AM, Zhen Zhang <izgz...@gmail.com> wrote:
> Hi everyone, > > I am having trouble porting some 6.8.2 GHC code to 7.8.3 GHC. The main > trouble I met is that, in 6.8.2, there is a includes/mkDerivedConstants.c and > some constants about RTS are declared here. > > While in 7.8.3, there is only a > similar `includes/dist-derivedconstants/header` directory containing a > bunch of code. Some seems generated like `DerivedConstants.h`, and it seems > like `tmp.c` generated this. > > However, when I added some entries in `tmp.c` and compiled it, then it > became the original version ... So I doubted that if there is another file > which is equivalent to the includes/mkDerivedConstants.c in 6.8.2? > Hi Zhen, Take a look at utils/deriveConstants/DeriveConstants.hs. That program generates tmp.c, then compiles it with the C compiler and inspects the sizes of symbols in the resulting object file and writes the information it gathered to DerivedConstants.h. We do it this way now to support cross-compilation (in that case, the C compiler generates object files for the target platform so we can't simply run them on the system that is building GHC). Regards, Reid Barton
_______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs