validate failure (GCC warning)

compiling on Ubuntu "Jaunty" 9.04, bootstrapping HEAD using its packages with env CPUS=2 ./validate:

packages:

gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3
The Glorious Glasgow Haskell Compilation System, version 6.8.2
Happy Version 1.17
Alex version 2.2

error:

inplace/bin/ghc-stage1 -optc-Werror -optc-Ilibraries/process/include -optc-Dbase4 -optc-I/Users/me/gsoc2009/builds/1/libraries/directory/include -optc-I/Users/me/gsoc2009/builds/1/libraries/unix/include -optc-I/Users/me/gsoc2009/builds/1/libraries/old-time/include -optc-I/Users/me/gsoc2009/builds/1/libraries/base/include -optc-I/Users/me/gsoc2009/builds/1/includes -optc-I/Users/me/gsoc2009/builds/1/libffi/build/include  -Werror -H64m -O0 -fasm    -package-name process-1.0.1.1 -hide-all-packages -i -ilibraries/process/. -ilibraries/process/dist-install/build -ilibraries/process/dist-install/build/autogen -Ilibraries/process/dist-install/build -Ilibraries/process/dist-install/build/autogen -Ilibraries/process/include  -optP-Dbase4 -optP-include -optPlibraries/process/dist-install/build/autogen/cabal_macros.h -package base-4.0.0.0 -package directory-1.0.0.2 -package filepath-1.1.0.1 -package unix-2.3.1.0  -XCPP -O -fasm -dcore-lint -fno-warn-deprecated-flags    -c libraries/process/cbits/runProcess.c -o libraries/process/dist-install/build/cbits/runProcess.o
#[I deleted unrelated stuff here from parallel make / CPUS=2]
cc1: warnings being treated as errors
libraries/process/cbits/runProcess.c: In function ‘runInteractiveProcess’:

libraries/process/cbits/runProcess.c:51:0:
     error: ignoring return value of ‘pipe’, declared with attribute warn_unused_result

libraries/process/cbits/runProcess.c:54:0:
     error: ignoring return value of ‘pipe’, declared with attribute warn_unused_result

libraries/process/cbits/runProcess.c:57:0:
     error: ignoring return value of ‘pipe’, declared with attribute warn_unused_result

Trac metadata

Trac field	Value
Version	6.11
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
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