P8 build fixes for modern GCC#193

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shenki wants to merge 15 commits intoopen-power:master-p8from

shenki:master-p8-build-fixes

Commits on Jan 3, 2020

ifcompiler: Fix stream operation
shenki
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HB Improvements: Fix compiler warnings on modern compilers

LF-Luis
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shenki
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Remove legacy binutils workaround in tracehash

geissonator
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shenki
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Fix Tracehash Buffer Overflow

Benjamin Herrenschmidt
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shenki
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Changes for Habanero bringup, uart delay and centaur/vddr

brs332
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shenki
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GCC 4.9: Make compiler use ELFv1 ABI.

geissonator
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shenki
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Default to std=gnu++03

stewartsmith
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shenki
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fix build error: return-statement with a value, in function returning 'void'

stewartsmith
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shenki
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error: dereferencing type-punned pointer will break strict-aliasing rules

stewartsmith
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shenki
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Change cv_forcedMemPeriodic to uint8_t as bool is invalid

stewartsmith
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shenki
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error: the compiler can assume that the address of ‘r’ will never be NULL

stewartsmith
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shenki
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Fix compiler can assume address will never be NULL error with GCC6

stewartsmith
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shenki
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error: in C++98 ‘l_vmVersionBuf’ must be initialized by constructor

stewartsmith
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shenki
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Use -std=gnu++03 for host g++ invocations

stewartsmith
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shenki
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kernel: Update assembly for modern binutils

Joel Stanley
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shenki
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