[Bug lto/78140] [7 Regression] libxul -flto uses 1GB more memory than gcc-6

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78140

--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
BTW Firefox trunk fails to build for me:

ld: error: /tmp/ccsbLieS.ltrans29.ltrans.o: requires dynamic R_X86_64_PC32
reloc against '_ZN2js3jitL2R0E' which may overflow at runtime; recompile with
-fPIC
ld: error: read-only segment has dynamic relocations
/tmp/ccsbLieS.ltrans29.ltrans.o:<artificial>:function
js::jit::BaselineCompiler::emitCheckThis(js::jit::ValueOperand) [clone
.constprop.20226]: error: undefined reference to 'js::jit::R0'

Haven't looked into it yet. Could well be a Firefox bug.