http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54284
Bug #: 54284 Summary: -mabi=ieeelongdouble problems Classification: Unclassified Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassig...@gcc.gnu.org ReportedBy: seg...@gcc.gnu.org CC: berg...@vnet.ibm.com, dje....@gmail.com, meiss...@gcc.gnu.org Target: powerpc-* As I noted in http://gcc.gnu.org/ml/gcc-patches/2012-08/msg01017.html , there are quite a few problems with -mabi=ieeelongdouble. On 64-bit Linux it crashes the compiler: Program received signal SIGSEGV, Segmentation fault. 0x0000000010578da4 in simplify_subreg (outermode=TImode, op=0xfffb69b1160, innermode=TFmode, byte=0) at /home/segher/src/gcc/gcc/simplify-rtx.c:5429 The other issues are more minor, but the option obviously suffers from a lack of testing.