On 12/14/2011 11:14 AM, Tom Lane wrote:
-ffloat-store is a brute force solution, I think, and would affect old versions of gcc that don't exhibit any problems. I would suggest altering configure to see whether the compiler recognizes -fexcess-precision=standard and adding that to CFLAGS if so.
OK, this and the associated configure change seems to do the trick: diff --git a/configure.in b/configure.in index 9cf084d..b29bb61 100644 --- a/configure.in +++ b/configure.in @@ -437,6 +437,8 @@ if test "$GCC" = yes -a "$ICC" = no; then PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing]) # Disable optimizations that assume no overflow; needed for gcc 4.3+ PGAC_PROG_CC_CFLAGS_OPT([-fwrapv]) + # Disable FP optimizations that cause isinf errors on gcc 4.5+ + PGAC_PROG_CC_CFLAGS_OPT([-fexcess-precision=standard]) elif test "$ICC" = yes; then # Intel's compiler has a bug/misoptimization in checking for # division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS. I guess we should backpatch it? cheers andrew -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers