RTS build failure with gcc-4.6.1

Building ghc from git HEAD on x86_64-linux (Debian unstable) with gcc-4.6 and getting:

"inplace/bin/ghc-stage1" -optc-Wall -optc-Werror -optc-Wall -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes -optc-Wmissing-declarations -optc-Winline -optc-Waggregate-return -optc-Wpointer-arith -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls -optc-Iincludes -optc-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 -Wall -Werror -H64m -O0 -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/Capability.c -o rts/dist/build/Capability.thr_o
rts/Capability.c: In function 'releaseCapability_':

rts/Capability.c:341:1:
     error: inlining failed in call to 'giveCapabilityToTask.isra.12.part.13': call is unlikely and code size would grow [-Werror=inline]

rts/Capability.c:368:1:  error: called from here [-Werror=inline]

rts/Capability.c:341:1:
     error: inlining failed in call to 'giveCapabilityToTask.isra.12.part.13': call is unlikely and code size would grow [-Werror=inline]

rts/Capability.c:368:1:  error: called from here [-Werror=inline]

rts/Capability.c:341:1:
     error: inlining failed in call to 'giveCapabilityToTask.isra.12.part.13': call is unlikely and code size would grow [-Werror=inline]

rts/Capability.c:368:1:  error: called from here [-Werror=inline]
cc1: all warnings being treated as errors

make[1]: *** [rts/dist/build/Capability.thr_o] Error 1

Trac metadata

Trac field	Value
Version	7.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Runtime System
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