[Bug middle-end/38299] internal error: segmentation fault
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38299 David O'Shea changed: What|Removed |Added CC||david.oshea at emulex dot | |com --- Comment #7 from David O'Shea 2012-04-14 16:51:46 UTC --- In playing with the -O2 and -O flags, it would appear to be that the -fgcse subflag of the -O2 flags causes the failure. So you can substitute the following and get the compiler to build the library -O2 -no-gcse. This builds a less great (no Global Common Subexpression Elimination) library, but it builds on 3.2.1... The result is a larger library, but at least it builds.
[Bug middle-end/38299] internal error: segmentation fault
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38299 --- Comment #8 from David O'Shea 2012-04-14 17:58:31 UTC --- (In reply to comment #7) Spoke too soon. Things just compiled slower and it took longer to get to the same failure, I was fooled.As it is, you have to fall all the way back to the -O option, and then add in -fXXX options from the -O2 list. The problematic item is in one of: -fschedule-insns -fschedule-insns2 -fsched-interblock -fsched-spec And appears to be either or both of: -fschedule-insns or -fschedule-insns2 The -O2 items below were removed because ARM-ELF 3.2.1 does not understand them: (They are newer -O2 items as documented in newer GCC man page). -fcrossjumping -finline-small-functions -fipa-sra -freorder-functions -fstrict-overflow -ftree-switch-conversion -ftree-pre -ftree-vrp -findirect-inlining I'm getting success with the below. This turns of instruction reordering optimizations=speed (but still uses common subexpression elimination = size). CXXFLAGS= -g -O -fgcse -fgcse-lm -fthread-jumps -falign-functions -falign-jumps -falign-loops -falign-labels -fcaller-saves -fcse-follow-jumps -fcse-skip-blocks -fdelete-null-pointer-checks -fexpensive-optimizations -foptimize-sibling-calls -fpeephole2 -fregmove -freorder-blocks -frerun-cse-after-loop -fstrict-aliasing
