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configure: only use -ffloat-store on i386

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this option is expensive and only used on old gcc's that lack
-fexcess-precision=standed, but it's not needed on non-i386 archs
where floating point does not have excess precision anyway.

if musl ever supports m68k, i think it will need to be special-cased
too. i'm not aware of any other archs with excess precision.
This commit is contained in:
Rich Felker 2012-07-03 23:53:05 -04:00
commit 2121b8a44f
1 changed files with 1 additions and 1 deletions
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2
configure vendored
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@ -209,7 +209,7 @@ tryflag CFLAGS_C99FSE -nostdinc
tryflag CFLAGS_C99FSE -ffreestanding \
|| tryflag CFLAGS_C99FSE -fno-builtin
tryflag CFLAGS_C99FSE -fexcess-precision=standard \
|| tryflag CFLAGS_C99FSE -ffloat-store
|| { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; }
tryflag CFLAGS_C99FSE -frounding-math
#