m4/sage_check_osx_supported.m4: Do not exit with error if fink or mac…

…ports is found

m4/sage_check_osx_supported.m4

@@ -40,29 +40,5 @@ AC_DEFUN([SAGE_CHECK_OSX_SUPPORTED], [
             fi
         fi >& AS_MESSAGE_FD
 
-        #######################################################################
-        # (OS X only)
-        # Sage will probably not build at all if either Fink or MacPorts can be
-        # found, and the error messages can be extremely confusing.  Even if it
-        # does build, the product will probably be wrong.  This runs a basic
-        # check to find them. Once the Sage build process is perfected, this
-        # won't be necessary.
-        # dphilp 15/9/2008
-        #######################################################################
-        PORTS_PATH=`which port`
-        if test -f "$PORTS_PATH"; then
-            AC_MSG_ERROR(["found MacPorts in $PORTS_PATH. Either:
-            (1) rename /opt/local and /sw, or
-            (2) change PATH and DYLD_LIBRARY_PATH
-            (Once Sage is built, you can restore them.)])
-        fi
-
-        FINK_PATH=`which fink`
-        if test -f "$FINK_PATH"; then
-            AC_MSG_ERROR(["found Fink in $FINK_PATH. Either:
-            (1) rename /opt/local and /sw, or
-            (2) change PATH and DYLD_LIBRARY_PATH
-            (Once Sage is built, you can restore them.)])
-        fi
     ])
 ])