[PATCH 2/2] Add gdb_libdir/python-<version> in front of Python search path.

[Joel Brobecker <brobecker@adacore.com>]

This patch puts gdb_libdir/python-<version> at the beginning of
the python search path.  This allows GDB to use its own copy/version
of the Python library.

2010-05-20  Joel Brobecker  <brobecker@adacore.com>

        * python.c (_initialize_python): Add variable libdir in gdb module.
        Insert gdb_libdir/python-<version> at head of python search path.

Tested on x86_64-linux. No regression.

---
 gdb/python/python.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/gdb/python/python.c b/gdb/python/python.c
index 3110328..fa76838 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -654,6 +654,7 @@ Enables or disables printing of Python stack traces."),
   PyModule_AddStringConstant (gdb_module, "VERSION", (char*) version);
   PyModule_AddStringConstant (gdb_module, "HOST_CONFIG", (char*) host_name);
   PyModule_AddStringConstant (gdb_module, "TARGET_CONFIG", (char*) target_name);
+  PyModule_AddStringConstant (gdb_module, "libdir", (char*) gdb_libdir);
 
   gdbpy_initialize_auto_load ();
   gdbpy_initialize_values ();
@@ -702,6 +703,11 @@ class GdbOutputFile:\n\
 \n\
 sys.stderr = GdbOutputFile()\n\
 sys.stdout = GdbOutputFile()\n\
+\n\
+# Put gdb_libdir/python-<version> in the python search path.  This allows\n\
+# us to provide GDB bundled with its own python runtime (the .py/pyc files).\n\
+sys.path.insert(0, gdb.libdir + \"/python-%d.%d\" % (sys.version_info[0],\n\
+                                                     sys.version_info[1]))\n\
 ");
 
   /* Release the GIL while gdb runs.  */
-- 
1.7.1