fix #10305 nim cpp is now nan-correct at CT (#10310)

* fix #10305 nim cpp is now nan-correct at CT * add example where simply `nim cpp -d:release` would exhibit nan bug
2019-01-15 05:50:28 -08:00 · 2019-01-15 05:50:28 -08:00 · 4355f23ee5
commit 4355f23ee5
parent 9a92bc15b3
3 changed files with 35 additions and 4 deletions
--- a/doc/nimc.rst
+++ b/doc/nimc.rst
@ -347,6 +347,9 @@ complete list.
 Define                   Effect
 ======================   =========================================================
 ``release``              Turns off runtime checks and turns on the optimizer.
+                         More aggressive optimizations are possible, eg:
+                         ``--passC:-ffast-math`` (but see issue #10305)
+                         ``--stacktrace:off``
 ``useWinAnsi``           Modules like ``os`` and ``osproc`` use the Ansi versions
                         of the Windows API. The default build uses the Unicode
                         version.