Re: Error building ghc on raspberry pi.

Karel Gardas Tue, 15 Jan 2013 09:18:15 -0800

Well, if you make some board available in DMZ I'm certainly interestedto run at least configure on it from GHC HEAD to see what we need tohack in order to add support for RPi into GHC HEAD.

Unfortunately GHC HEAD is now in a wrong state w.r.t. LLVM based build,but Austin is working on this. I think I can hack support for RPi in themeantime for testing later on fixed GHC HEAD LLVM build...


Karel

On 01/15/13 06:07 PM, [email protected] wrote:

In theory we could try a couple variations of builds at the same time.
But at the moment, I'm running low on ideas on what to try.

I just got the, extensive, raspbian patches for 7.4.1 and I'm going to
browse through them when I get time (apt-get source ghc).

On Tue, 15 Jan 2013, Neil Davies wrote:

Hi - would another RPi (or even 2 from tomorrow another one arriving)
help?

I can make them accessible (i.e. in our DMZ) -

Neil

On 15 Jan 2013, at 16:36, [email protected] wrote:

On Mon, 14 Jan 2013, Thijs Alkemade wrote:

Op 14 jan. 2013, om 17:30 heeft [email protected] het volgende
geschreven:

On Thu, 10 Jan 2013, Karel Gardas wrote:


Hmm, are you using Raspbian? I.e. hard-float abi caught my eye in
case of ARMv6/ARM11 chip here...

I'm afraid LLVM is not well guided in your case so could you be so
kind and test if adding -optlc=-mattr=+vfp2 helps? You need to add
it to your build.mk probably and you will need to rebuild
everything again...


No change with

SRC_HC_OPTS = -H64m -Rghc-timing -optc-mfloat-abi=hard
-optc-march=armv6 -optc-mfpu=vfp -optlc=-mattr=+vfp2
GhcStage1HcOpts = -O -fllvm
GhcStage2HcOpts = -O0 -fllvm
GhcLibHcOpts = -O -fllvm

I still get the error:

===--- building final phase
make -r --no-print-directory -f ghc.mk phase=final all
LD libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
/usr/bin/ld: error:
libraries/ghc-prim/dist-install/build/cbits/debug.o uses VFP
register arguments,
libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
/usr/bin/ld: failed to merge target specific data of file
libraries/ghc-prim/dist-install/build/cbits/debug.o

I don't really understand what is going on here. The file
libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o doesn't
even exist, so when I manually run /usr/bin/ld I get:

$ /usr/bin/ld
libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
/usr/bin/ld: cannot find
libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o: No such
file or directory

What is make really doing here?

My research suggests that this error is a symptom of trying to link
something without the hard-float ABI together with something with a
soft-float ABI. But I don't know where
libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o is
coming from.


libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o is the
output ld was asked to generate. Apparently, some of the input .o
files didn't use VFP register arguments, so ld concluded that the
output should also not use VFP register arguments. But then ld
encountered a .o file that did use VFP register arguments, and threw
an error (something in cbits, so probably built with different CFLAGS).

From your flags I'd say you miss -optlc-float-abi=hard. I had it in
GhcLibHcOpts, but I'm not sure that is the correct way to ensure it
is passed to everything exactly once.


Okay, I tried:

SRC_HC_OPTS = -H64m -Rghc-timing -optc-mfloat-abi=hard
-optc-march=armv6 -optc-mfpu=vfp -optlc=-mattr=+vfp2
GhcStage1HcOpts = -O -fllvm
GhcStage2HcOpts = -O0 -fllvm
GhcLibHcOpts = -O -fllvm -optlc-float-abi=hard

and I got the same error at a different build step. I'm not sure if
it is earlier or later.

It seems still not everything is using the hard-float ABI.

===--- building final phase
make -r --no-print-directory -f ghc.mk phase=final all
HC [stage 1] utils/hsc2hs/dist-install/build/tmp/hsc2hs
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments, utils/hsc2hs/dist-install/build/Main.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/Main.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments, utils/hsc2hs/dist-install/build/HSCParser.o
does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/HSCParser.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
utils/hsc2hs/dist-install/build/DirectCodegen.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/DirectCodegen.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
utils/hsc2hs/dist-install/build/CrossCodegen.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/CrossCodegen.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
utils/hsc2hs/dist-install/build/UtilsCodegen.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/UtilsCodegen.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments, utils/hsc2hs/dist-install/build/Common.o does
not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/Common.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments, utils/hsc2hs/dist-install/build/C.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/C.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments, utils/hsc2hs/dist-install/build/Flags.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/Flags.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
utils/hsc2hs/dist-install/build/Paths_hsc2hs.o does not
/usr/bin/ld: failed to merge target specific data of file
utils/hsc2hs/dist-install/build/Paths_hsc2hs.o
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Apply.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Apply.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Exception.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Exception.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(HeapStackCheck.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(HeapStackCheck.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(PrimOps.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(PrimOps.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgMiscClosures.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgMiscClosures.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgStartup.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgStartup.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgStdThunks.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(StgStdThunks.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Updates.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(Updates.o)
/usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses
VFP register arguments,
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(AutoApply.o) does not
/usr/bin/ld: failed to merge target specific data of file
/tmp/ghc-7.6.1b/rts/dist/build/libHSrts.a(AutoApply.o)
collect2: ld returned 1 exit status
<<ghc: 10689448 bytes, 2 GCs, 95944/95944 avg/max bytes residency (1
samples), 62M in use, 0.00 INIT (0.00 elapsed), 0.81 MUT (9.41
elapsed), 0.13 GC (0.13 elapsed) :ghc>>
make[1]: *** [utils/hsc2hs/dist-install/build/tmp/hsc2hs] Error 1
make: *** [all] Error 2

--
Russell O'Connor <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American
Graphophone
Company wrote, ``is the merest claptrap, for there exists no property in
ideas musical, literary or artistic, except as defined by statute.''

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Re: Error building ghc on raspberry pi.

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