[RFC] Help python find its files

[dje@google.com (Doug Evans)]

Hi.

We had problems with python not being able to find its files.
This may be specific to installations where gdb and python
are installed in different places.

2010-02-08  Doug Evans  <dje@google.com>

	* configure.ac (--with-python): Define WITH_PYTHON_PATH if
	--with-python arg is a path.
	* config.in: Regenerated.
	* configure: Regenerated.
	* python/python.c (_initialize_python): If configured
	--with-python=/path, pass a fake argv[0] to Py_SetProgramName so
	python can find its files.

Index: configure.ac
===================================================================
RCS file: /cvs/src/src/gdb/configure.ac,v
retrieving revision 1.114
diff -u -p -r1.114 configure.ac
--- configure.ac	25 Jan 2010 13:22:02 -0000	1.114
+++ configure.ac	8 Feb 2010 19:08:11 -0000
@@ -652,6 +657,13 @@ else
       AC_DEFINE(HAVE_LIBPYTHON2_4, 1, [Define if Python 2.4 is being used.])
     fi
   fi
+  if test ${have_libpython} = yes; then
+    case "${with_python}" in
+    /*)
+      AC_DEFINE_UNQUOTED(WITH_PYTHON_PATH, "${with_python}", [Define if --with-python contains a path.])
+      ;;
+    esac
+  fi
   if test ${have_libpython} = no; then
     case "${with_python}" in
     yes)
Index: python/python.c
===================================================================
RCS file: /cvs/src/src/gdb/python/python.c,v
retrieving revision 1.25
diff -u -p -r1.25 python.c
--- python/python.c	18 Jan 2010 10:50:44 -0000	1.25
+++ python/python.c	8 Feb 2010 19:08:11 -0000
@@ -631,6 +631,12 @@ Enables or disables auto-loading of Pyth
 			   &show_python_list);
 
 #ifdef HAVE_PYTHON
+#ifdef WITH_PYTHON_PATH
+  /* Work around problem where python gets confused about where it is,
+     and then can't find its libraries, etc.
+     Lie and pretend argv[0] is in WITH_PYTHON_PATH.  */
+  Py_SetProgramName(WITH_PYTHON_PATH "/bin/python");
+#endif
   Py_Initialize ();
   PyEval_InitThreads ();