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Set the default behavior on alpha to use -mieee since the large majority of
time we want this (bad/weird things can happen with packages built without
it).
To satisfy those people who may not want -mieee forced on them all the time,
we also provide -mno-ieee.
Patch by Mike Frysinger <vapier@gentoo.org>
Note: upstream doesn't want to take this due to long standing behavior, and
because it'd make behavior across OS's inconsistent:
https://gcc.gnu.org/ml/gcc-patches/2003-07/msg02144.html
This makes sense for upstream, but Gentoo is more concerned about packages
behaving the same across arches under Linux.
--- a/gcc/config/alpha/alpha.h
+++ b/gcc/config/alpha/alpha.h
@@ -96,7 +96,7 @@
while (0)
#endif
-#define CPP_SPEC "%(cpp_subtarget)"
+#define CPP_SPEC "%(cpp_subtarget) %{!no-ieee:-mieee}"
#ifndef CPP_SUBTARGET_SPEC
#define CPP_SUBTARGET_SPEC ""
@@ -301,6 +301,8 @@
N_("Request IEEE-conformant math library routines (OSF/1)")}, \
{"ieee", MASK_IEEE|MASK_IEEE_CONFORMANT, \
N_("Emit IEEE-conformant code, without inexact exceptions")}, \
+ {"no-ieee", - (MASK_IEEE|MASK_IEEE_CONFORMANT), \
+ N_("Do not emit IEEE-conformant code, without inexact exceptions")}, \
{"ieee-with-inexact", MASK_IEEE_WITH_INEXACT|MASK_IEEE_CONFORMANT, \
N_("Emit IEEE-conformant code, with inexact exceptions")}, \
{"build-constants", MASK_BUILD_CONSTANTS, \
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