Allow builds with Ingres 10 when Ingres bug 119773 has undocumented librt dependency

This basically restores a modified version of the fix 
for Trac Bug #224, Add librt to allow runtime link 
requirements to be satisfied. Hopefully the Ingres bug 
will be corrected (again) soon, this workaround in the 
Python driver should band-aid over the problem until 
that time.

This change is Linux specific.

Also updated the readme to address Trac Bug #577 by 
documenting python devel requirement. Also always use 
the force flag (for new users who need setup.py 
distutils help, force is a good idea in case they 
re-run).



git-svn-id: http://code.ingres.com/ingres/drivers/python/main@2776 45b5d43f-8932-4c86-835a-3654e5842839

Author: clach04

README.txt

@@ -316,9 +316,10 @@ Mac OS X, Linux and Unix
 
         cd ingresdbi-2.0.1
 
-3.  Initiate the build process. ::
+3.  Initiate the build process.
+    NOTE this requires the python devel packages to be installed ::
 
-        python setup.py build
+        python setup.py build --force
 
 
 
@@ -336,7 +337,7 @@ Windows
 
 -   Initiate the build process. ::
 
-            python setup.py build
+            python setup.py build --force
 
 
 **Note:** You can skip this and jump straight to the install process as this

setup.py

@@ -196,6 +196,10 @@
 # Default build flags, libraries, etc.
 defmacros=[("DBIVERSION", dbiversion_str)]
 libraries=["frame.1", "iiodbc.1", "m", "c"]
+if platform.startswith('linux'):
+    # workaround libq bug where rt is not linked to libq
+    # odbc needs libq, ingresdbi needs odbc
+    libraries += ['rt']
 
 # wintel build flags, hopefully the same for amd64 winxp
 if platform=="win32":