http://llvm.org/bugs/show_bug.cgi?id=12160
Bug #: 12160
Summary: clang -O2 implies -fno-math-errno but doesn't set
math_errhandling properly
Product: clang
Version: 3.0
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 8132
--> http://llvm.org/bugs/attachment.cgi?id=8132
test case
(I've split this specific issue out from PR11858.)
With the attached test case I get:
$ clang -O2 -o sq sq.c -lm && ./sq
fail
... because clang -O2 implies -fno-math-errno which disables proper errno
handling for math functions, but math_errhandling still has the MATH_ERRNO bit
set.
I'm using svn trunk r151520 on Ubuntu 11.10 x86_64.
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