[PATCH for-next v2 v2 5/5] Update python requirement

[Wei Liu <wei.liu2@citrix.com>]

CentOS 5, which was the reason of the 2.4 restriction, is EOL. CentOS
6 ships 2.6.

Bump the version to 2.6 in README. Now that all scripts are 3
compatible, remove the restriction on python 2 as well.

Update the check in configure.ac.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 README             | 10 ++--------
 tools/configure    |  8 ++++----
 tools/configure.ac |  2 +-
 3 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/README b/README
index c19409efa2..3049201d91 100644
--- a/README
+++ b/README
@@ -46,7 +46,7 @@ provided by your OS distributor:
         - GCC 4.8 or later
         - GNU Binutils 2.24 or later
     * Development install of zlib (e.g., zlib-dev)
-    * Development install of Python 2, v2.4 or later (e.g., python-dev)
+    * Development install of Python v2.6 or later (e.g., python-dev)
     * Development install of curses (e.g., libncurses-dev)
     * Development install of openssl (e.g., openssl-dev)
     * Development install of x11 (e.g. xorg-x11-dev)
@@ -177,16 +177,10 @@ Python Runtime Libraries
 
 Various tools, such as pygrub, have the following runtime dependencies:
 
-    * Python 2, v2.4 or later.
+    * Python v2.6 or later.
           URL:    http://www.python.org/
           Debian: python
 
-Note that the build system expects `python` to be python2.  If your system
-has `python` pointing to python3 (as in the case of Arch Linux or Anaconda),
-you'll need to specify a path to a python2 binary when running configure:
-
-    PYTHON=/usr/bin/python2 ./configure
-
 Intel(R) Trusted Execution Technology Support
 =============================================
 
diff --git a/tools/configure b/tools/configure
index 632ccce445..e1fa5d6b0f 100755
--- a/tools/configure
+++ b/tools/configure
@@ -7002,15 +7002,15 @@ if test x"${PYTHONPATH}" = x"no"
 then
     as_fn_error $? "Unable to find $PYTHON, please install $PYTHON" "$LINENO" 5
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for python version >= 2.3 " >&5
-$as_echo_n "checking for python version >= 2.3 ... " >&6; }
-`$PYTHON -c 'import sys; sys.exit(eval("sys.version_info < (2, 3)"))'`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for python version >= 2.6 " >&5
+$as_echo_n "checking for python version >= 2.6 ... " >&6; }
+`$PYTHON -c 'import sys; sys.exit(eval("sys.version_info < (2, 6)"))'`
 if test "$?" != "0"
 then
     python_version=`$PYTHON -V 2>&1`
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-    as_fn_error $? "$python_version is too old, minimum required version is 2.3" "$LINENO" 5
+    as_fn_error $? "$python_version is too old, minimum required version is 2.6" "$LINENO" 5
 else
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
diff --git a/tools/configure.ac b/tools/configure.ac
index 1499344ce6..c9fd69ddfa 100644
--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -358,7 +358,7 @@ AS_IF([echo "$PYTHON" | grep -q "^/"], [
 ],[test -z "$PYTHON"], [PYTHON="python"],
 [AC_MSG_ERROR([PYTHON specified, but is not an absolute path])])
 AX_PATH_PROG_OR_FAIL([PYTHONPATH], [$PYTHON])
-AX_CHECK_PYTHON_VERSION([2], [3])
+AX_CHECK_PYTHON_VERSION([2], [6])
 
 AS_IF([test "$cross_compiling" != yes], [
     AX_CHECK_PYTHON_DEVEL()
-- 
2.11.0


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