25 lines
986 B
Diff
25 lines
986 B
Diff
# DP: #212912
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# DP: on alpha-linux, make -mieee default and add -mieee-disable switch
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# DP: to turn default off (doc patch)
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---
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gcc/doc/invoke.texi | 7 +++++++
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1 files changed, 7 insertions(+), 0 deletions(-)
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--- a/src/gcc/doc/invoke.texi
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+++ b/src/gcc/doc/invoke.texi
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@@ -25470,6 +25470,13 @@ able to correctly support denormalized n
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values such as not-a-number and plus/minus infinity. Other Alpha
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compilers call this option @option{-ieee_with_no_inexact}.
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+DEBIAN SPECIFIC: This option is on by default for alpha-linux-gnu, unless
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+@option{-ffinite-math-only} (which is part of the @option{-ffast-math}
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+set) is specified, because the software functions in the GNU libc math
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+libraries generate denormalized numbers, NaNs, and infs (all of which
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+will cause a programs to SIGFPE when it attempts to use the results without
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+@option{-mieee}).
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+
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@opindex mieee-with-inexact
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@item -mieee-with-inexact
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This is like @option{-mieee} except the generated code also maintains
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