Hi,
I had a couple of problems trying to build ARM_SE on Fedora 14 using
gcc/g++ version 3.4.6 (and gcc 4.5.1 also, see bottom) following the
instructions on the Wiki. I tried to report them on the bug tracker
but I couldn't see a way to report new bugs. I have resolved the
issues so that it works for me. The following summarizes the
modifications I made.
One problem I ran across was two errors (warnings but -Werror is in
use) of this form:
build/ARM_SE/arch/arm/insts/vfp.cc:849: warning: converting of
negative value `-0x00000000000000001' to `uint32_t'
I changed these to return 0, probably there should be a more robust
error / fault return but I don't know what that would be. These were
also in the m5-stable repo.
There were also two cases similar to the following:
[ CXX] ARM_SE/arch/arm/atomic_simple_cpu_exec.cc -> .fo
build/ARM_SE/arch/arm/atomic_simple_cpu_exec.cc: In member function
`virtual Fault ArmISAInst::Tbh::execute(AtomicSimpleCPU*,
Trace::InstRecord*) const':
build/ARM_SE/arch/arm/atomic_simple_cpu_exec.cc:55075: warning: 'NPC'
might be used uninitialized in this function
scons: *** [build/ARM_SE/arch/arm/atomic_simple_cpu_exec.fo] Error 1
For these I changed the templates in mem.isa for LoadExecute and
LoadCompleteAcc. The problem is that a variable is set in the first if
(fault == NoFault) {...} and then accessed in a second block
predicated on if (fault == NoFault) {...}, which seems to confuse gcc
about variable initialization. I modified the checks to be cascaded:
if (fault == NoFault) { ... if (fault == NoFault) { ... } }
I also had this error, which appears to be something that is protected
by an if-check in ext/libelf/SConscript:
cc1: error: unrecognized command line option "-Wno-pointer-sign"
I guess something is wrong when snooping the version number of gcc34
on Fedora. Perhaps the SConscript file is finding the gcc 4.5 and not
gcc 3.4. I simply removed the flag in my build for now.
I also tried with gcc 4.5.1, but had the following error which I
didn't try to debug:
[ CXX] ARM_SE/arch/arm/atomic_simple_cpu_exec.cc -> .fo
cc1plus: warnings being treated as errors
build/ARM_SE/cpu/simple_thread.hh: In member function 'Fault
ArmISAInst::MicroPackNeon2to2Uop<Element>::execute(AtomicSimpleCPU*,
Trace::InstRecord*) const [with Element = unsigned int, Fault =
RefCountingPtr<FaultBase>]':
build/ARM_SE/cpu/simple_thread.hh:291:37: error:
'destRegs.ArmISAInst::MicroPackNeon2to2Uop<Element>::execute(AtomicSimpleCPU*,
Trace::InstRecord*) const [with Element = unsigned int, Fault =
RefCountingPtr<FaultBase>]::DestRegs::fRegs[1]' may be used
uninitialized in this function
build/ARM_SE/arch/arm/atomic_simple_cpu_exec.cc:42600:15: note:
'destRegs.ArmISAInst::MicroPackNeon2to2Uop<Element>::execute(AtomicSimpleCPU*,
Trace::InstRecord*) const [with Element = unsigned int, Fault =
RefCountingPtr<FaultBase>]::DestRegs::fRegs[1]' was declared here
scons: *** [build/ARM_SE/arch/arm/atomic_simple_cpu_exec.fo] Error 1
scons: building terminated because of errors.
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