Simon Marlow marlowsd at gmail.com
Wed Dec 11 08:12:21 UTC 2013

I think you should look at 
includes/dist-derivedconstants/header/DerivedConstants.h first, look for 
the lines that I pasted in my email below.  The problem is likely in 
there, but the file is automatically generated so you'll need to look at 
how it is generated.  The program is in utils/deriveConstants.


On 10/12/2013 21:43, Alexander Pakhomov wrote:
> Thanks. I think preprocessor dump could help me:
> cpp -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -Irts/dist/build -Irts/dist/build/autogen         rts/HeapStackCheck.cmm > cpp_dump
> That is ghc-stage1 -> cpp and all options that cpp doesn't accept removed.
> I hope ghc preprocessor is compatible with system C preprocessor.
> 11.12.2013, 01:06, "Simon Marlow" <marlowsd at gmail.com>:
>> On 10/12/13 00:35, Alexander Pakhomov wrote:
>>>   Hi. Trying to compile ghc HEAD on OpenBSD I got an error:
>>>   rts/HeapStackCheck.cmm:97:18: parse error on input `['
>>>   The code is following:
>>>     96         if (HpAlloc <= BLOCK_SIZE
>>>     97             && bdescr_link(CurrentNursery) != NULL) {
>>>   which preprocesses to:
>>>            if (HpAlloc <= (1<<12)
>>>                && b0[CurrentNursery+15] != (0::bits64)) {
>>>   This is the first occurrence of b0 in preprocessed file. I believe that it is due to undefined b0.
>>>   Command that fails is:
>>>   "inplace/bin/ghc-stage1" -static  -H32m -O -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -package-name rts -dcmm-lint      -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2    -c rts/HeapStackCheck.cmm -o rts/dist/build/HeapStackCheck.o
>>>   To preprocess do the following:
>>>   cpp -O -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -Irts/dist/build -Irts/dist/build/autogen         rts/HeapStackCheck.cmm | less
>>>   Can you please find source of b0 in preprocessed file?
>> I think this means that something went wrong when generating
>> DerivedConstants.h, which is where the definition of bdescr_link() comes
>> from.  In my build, I have the following, in the file
>> includes/dist-derivedconstants/header/:
>> #define OFFSET_bdescr_link 16
>> #define REP_bdescr_link b64
>> #define bdescr_link(__ptr__) REP_bdescr_link[__ptr__+OFFSET_bdescr_link]
>> This is auto-generated by the program in utils/deriveConstants.  This
>> used to be a C program, but nowadays it's a Haskell program that
>> generates a C program for reasons that I forget.  Anyway, your problem
>> is somewhere in there... see if you can find out where by dumping out
>> intermediate files and so forth.  If you get stuck, tell us where you
>> get to and we'll try to help some more.
>> Cheers,
>> Simon

More information about the ghc-devs mailing list