id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
4871,Build failure on windows: rts/Linker.c,nsch,,"I'm getting this error when trying to compile current GHC-HEAD on windows:

{{{
""inplace/bin/ghc-stage1.exe"" -optc-Wall -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes -optc-Wmissing-declarations -optc-Wi
nline -optc-Waggregate-return -optc-Wpointer-arith -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls -optc-Iincludes -opt
c-Irts -optc-DCOMPILING_RTS -optc-fno-strict-aliasing -optc-fno-common -optc-Ilibffi/build/include -optc-fomit-frame-pointer -optc-DRtsWay=\
""rts_thr\"" -optc-DTHREADED_RTS  -H32m -O -Iincludes -Irts -DCOMPILING_RTS -package-name rts  -dcmm-lint  -Ilibffi/build/include     -i -irts
 -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen          -optc-O2   -c rts/Linker.c -o rts/dist/build/L
inker.thr_o

rts\Linker.c:1039:1:  error: conflicting types for 'mktime'
c:\haskell\ghc-src\inplace\mingw\bin\../lib/gcc/mingw32/4.5.0/../../../../include/time.h:104:40: note: previous declaration of 'mktime' was
here

rts\Linker.c:1039:1:  error: conflicting types for 'localtime'
c:\haskell\ghc-src\inplace\mingw\bin\../lib/gcc/mingw32/4.5.0/../../../../include/time.h:121:45: note: previous declaration of 'localtime' w
as here

rts\Linker.c:1039:1:  error: conflicting types for 'gmtime'
c:\haskell\ghc-src\inplace\mingw\bin\../lib/gcc/mingw32/4.5.0/../../../../include/time.h:120:45: note: previous declaration of 'gmtime' was
here
make[1]: *** [rts/dist/build/Linker.thr_o] Error 1
make: *** [all] Error 2
}}}

rts/Linker.c:1039 basicly is just:

{{{
RTS_MINGW_ONLY_SYMBOLS
}}}

with the definition somewhere below line 381:

{{{
/* These are statically linked from the mingw libraries into the ghc
   executable, so we have to employ this hack. */
#define RTS_MINGW_ONLY_SYMBOLS                           \
      ...
      SymI_NeedsProto(mktime)                            \
      ...
      SymI_NeedsProto(localtime)                         \
      SymI_NeedsProto(gmtime)                            \
      ...
}}}

I tried all different versions of MinGW - the one of the current Haskell Platform 2010.2.0.0 and the one currently available at mingw.org and an old version I had installed.

However, removing these 3 lines will result in another error, so the changes to fix this won't be that trivial:

{{{
rts\sm\GC.c: In function 'new_gc_thread':

rts\sm\GC.c:863:11:
     error: incompatible types when assigning to type 'OSThreadId' from type 'int'
make[1]: *** [rts/dist/build/sm/GC.thr_o] Error 1
make: *** [all] Error 2
}}}

(even though I'm not 100% if that's because of those changes, since I probably never got that far in the building process...)",bug,closed,normal,,Runtime System,,worksforme,mingw,,Windows,Unknown/Multiple,Building GHC failed,,,,,