[lmi-commits] [lmi] master 01cf424 2/5: Override an infelicitous gcc-6.3 default

[Greg Chicares]

branch: master
commit 01cf424a14f9d0c7a26b0531e8d9f3ce83e3db2d
Author: Gregory W. Chicares <address@hidden>
Commit: Gregory W. Chicares <address@hidden>

    Override an infelicitous gcc-6.3 default
---
 workhorse.make | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/workhorse.make b/workhorse.make
index de14cd5..c85ce3c 100644
--- a/workhorse.make
+++ b/workhorse.make
@@ -482,10 +482,14 @@ endif
 # Since at least gcc-3.4.2, -Wmissing-prototypes is deprecated as
 # being redundant for C++.
 
-# This file contains hexadecimal floating constants. There is no
-# specific compiler option to allow them.
-
 ifeq (6.3.0,$(gcc_version))
+  # The default '-fno-rounding-math' means something like
+  #   #pragma STDC FENV ACCESS OFF
+  # which causes harm while bringing no countervailing benefit--see:
+  #   http://lists.nongnu.org/archive/html/lmi/2017-08/msg00045.html
+  tutelary_flag += -frounding-math
+  # This file contains hexadecimal floating constants. There is no
+  # specific compiler option to allow them.
   value_cast_test.o: tutelary_flag += -std=gnu++11
 endif