Martin Quinson <martin.quinson@xxxxxxxx> writes: > But it fails as soon as I use -O1 on v4.x. It even fails with > -O1 -fno-defer-pop -fno-guess-branch-probability -fno-cprop-registers > -fno-loop-optimize -fno-if-conversion -fno-if-conversion2 > -fno-merge-constants -fno-tree-ccp -fno-tree-dce -fno-tree-dominator-opts > -fno-tree-dse -fno-tree-ter -fno-tree-lrs -fno-tree-sra > -fno-tree-copyrename -no-ftree-fre -fno-tree-ch -fno-delayed-branch > According to the documentation, this should be very close to -O0 since I > disable all the flags enabled by -O1. -O1 enables a large number of optimizations which can not be turned off using -f options. Ian
