[66579] trunk/base/src/pextlib1.0/Pextlib.c

[jmr at macports.org]

Revision: 66579
          http://trac.macports.org/changeset/66579
Author:   jmr at macports.org
Date:     2010-04-17 01:01:47 -0700 (Sat, 17 Apr 2010)
Log Message:
-----------
work around Tcl env behaviour that can cause a crash

Modified Paths:
--------------
    trunk/base/src/pextlib1.0/Pextlib.c

Modified: trunk/base/src/pextlib1.0/Pextlib.c
===================================================================
--- trunk/base/src/pextlib1.0/Pextlib.c	2010-04-17 06:54:39 UTC (rev 66578)
+++ trunk/base/src/pextlib1.0/Pextlib.c	2010-04-17 08:01:47 UTC (rev 66579)
@@ -399,6 +399,10 @@
 #else
         clearenv();
 #endif
+        /* "If the entire env array is unset then Tcl will stop monitoring
+            env accesses and will not update environment variables."
+            - <http://www.tcl.tk/man/tcl8.4/TclCmd/tclvars.htm#M4> */
+        setenv("MACPORTS_DUMMY", "", 0);
     } else {
         (void) unsetenv(name);
     }
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