#define _REENTRANT 1 (needed to get the right errno on some OSs)

Partial fix for hanging problems on Solaris and possibly *BSD.
A similar fix is also required to libraries/base/includes/HsBase.h.

diff --git a/includes/Rts.h b/includes/Rts.h
index 3ca0d9a..a62747e 100644 (file)
--- a/includes/Rts.h
+++ b/includes/Rts.h
@@ -34,6 +34,10 @@ extern "C" {
 #define __MSVCRT__ 1
 #endif
 
+/* Needed to get the macro version of errno on some OSs, and also to
+   get prototypes for the _r versions of C library functions. */
+#define _REENTRANT 1
+
 /*
  * We often want to know the size of something in units of an
  * StgWord... (rounded up, of course!)