[Fedora-haskell-list] [Bug 635935] New: [gold] ld.script with relative paths breaks with ld.gold linker

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Tue Sep 21 03:57:33 UTC 2010 

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Summary: [gold] ld.script with relative paths breaks with ld.gold linker

https://bugzilla.redhat.com/show_bug.cgi?id=635935

           Summary: [gold] ld.script with relative paths breaks with
                    ld.gold linker
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: binutils
        AssignedTo: nickc at redhat.com
        ReportedBy: petersen at redhat.com
         QAContact: extras-qa at fedoraproject.org
                CC: jakub at redhat.com, petersen at redhat.com,
                    bos at serpentine.com, nickc at redhat.com,
                    mnowak at redhat.com, loupgaroublond at gmail.com,
                    fedora-haskell-list at redhat.com, dvlasenk at redhat.com
        Depends on: 635581
    Classification: Fedora
    Target Release: ---
          Clone Of: 635581


ld.gold seems to not like relative paths in link scripts:

[ghc-6.12.3]$ /usr/bin/gcc -nostdlib -nodefaultlibs -Wl,-r -Wl,-x -o
libraries/ghc-prim/dist-install/build/GHC/Generics.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__1.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/.o::Generics(void)
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__3.o
:
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__16.o
collect2: ld returned 1 exit status
[ghc-6.12.3]$ cat
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script 
INPUT(libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__1.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__2.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__3.o
:
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__16.o)

It links ok with ld.bfd


Here is how I ran into this in bug 635581:

"inplace/bin/ghc-stage1"   -H32m -O    -package-name ghc-prim-0.2.0.0
-hide-all-packages -i -ilibraries/ghc-prim/.
-ilibraries/ghc-prim/dist-install/build
-ilibraries/ghc-prim/dist-install/build/autogen
-Ilibraries/ghc-prim/dist-install/build
-Ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/.   
-optP-include -optPlibraries/ghc-prim/dist-install/build/autogen/cabal_macros.h
-package rts-1.0 -split-objs -package-name ghc-prim -XCPP -XMagicHash
-XForeignFunctionInterface -XUnliftedFFITypes -XUnboxedTuples -XEmptyDataDecls
-XNoImplicitPrelude -O2 -XGenerics -fno-warn-deprecated-flags     -odir
libraries/ghc-prim/dist-install/build -hidir
libraries/ghc-prim/dist-install/build -stubdir
libraries/ghc-prim/dist-install/build -hisuf hi -osuf  o -hcsuf hc -c
libraries/ghc-prim/./GHC/Generics.hs -o
libraries/ghc-prim/dist-install/build/GHC/Generics.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__1.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/.o::Generics(void)
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__3.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__4.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__5.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__6.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__7.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__8.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__9.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__10.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__11.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__12.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__13.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__14.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__15.o
/usr/bin/ld: error: cannot find
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__16.o
collect2: ld returned 1 exit status
make[1]: *** [libraries/ghc-prim/dist-install/build/GHC/Generics.o] Error 1
make: *** [all] Error 2

I see a link script:

[ghc-6.12.3]$ ls libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/
Generics__1.o   Generics__12.o  Generics__15.o  Generics__3.o   Generics__6.o  
Generics__9.o   
Generics__10.o  Generics__13.o  Generics__16.o  Generics__4.o   Generics__7.o  
ld.script       
Generics__11.o  Generics__14.o  Generics__2.o   Generics__5.o   Generics__8.o   
[petersen at localhost ghc-6.12.3]$ cat
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script 
INPUT(libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__1.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__2.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__3.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__4.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__5.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__6.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__7.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__8.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__9.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__10.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__11.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__12.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__13.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__14.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__15.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/Generics__16.o)

Checking the verbose ghc output the problem occurs here with :

/usr/bin/gcc -nostdlib -nodefaultlibs -Wl,-r -Wl,-x -o
libraries/ghc-prim/dist-install/build/GHC/Generics.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script

Editing the linking script generated by ghc-split:

[ghc-6.12.3]$ sed -i.orig -e
"s%libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/%%g"
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script
[ghc-6.12.3]$ /usr/bin/gcc -nostdlib -nodefaultlibs -Wl,-r -Wl,-x -o
libraries/ghc-prim/dist-install/build/GHC/Generics.o
libraries/ghc-prim/dist-install/build/GHC/Generics_o_split/ld.script
[ghc-6.12.3]$ 

So question that arises is should ld.gold support relative paths in
link scripts or should ghc be changes to just like the local objects?

--- Additional comment from petersen at redhat.com on 2010-09-21 12:51:14 EST ---

The above sed change only works with ld.gold not ld.bfd.
So it seems to be a ld.gold change of behaviour or regression
compared to ld.bfd.  I would be willing to patch ghc for
Fedora if ld.gold and ld.bfd can agree on at least one of
the versions of link scripts working.

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