FIX #1861: floating-point constants for infinity and NaN in via-C

[ghc-hetmet.git] / includes / Stg.h

diff --git a/includes/Stg.h b/includes/Stg.h
index 7f37783..35f4eda 100644 (file)
--- a/includes/Stg.h
+++ b/includes/Stg.h
@@ -31,6 +31,9 @@
  */
 #ifndef IN_STG_CODE
 # define IN_STG_CODE 1
+# define _ISOC99_SOURCE
+// Turn on C99 for .hc code.  This gives us the INFINITY and NAN
+// constants from math.h, which we occasionally need to use in .hc (#1861)
 #endif
 
 #if IN_STG_CODE == 0