[commit/HEAD] Resync python-config.py with Python-2.7 version.

[Joel Brobecker <brobecker at adacore dot com>]

This is just a copy of the Python 2.7 version of python-config.py.
Tested with versions 2.5 and 2.6.  It's nearly identical to the
previous version, except it's written in a more pythonic way,
so it should be fine for 2.4 as well.

The reason I looked at this is because I'm having some issues with
building GDB with a Python that was configuration with a prefix that
is different from the actual prefix where Python is installed.  In
other words, I picked up a binary tarball of Python 2.6, and installed
it on my machine.  As it turns out, it does just work, because
python-config.py --ldflags returns PATHs using the prefix used at
configure time (which is irrelevant in my case).

I'm going to propose a patch to fix that, but I thought I'd patch
over the 2.7 version rather than the 2.6 version.

gdb/ChangeLog:

        * python/python-config.py: Resync with Python 2.7 version of this
        script.

Checked in.

---
 gdb/ChangeLog               |    5 +++
 gdb/python/python-config.py |   61 ++++++++++++++++++++++--------------------
 2 files changed, 37 insertions(+), 29 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 969fc53..96009f7 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2010-07-08  Joel Brobecker  <brobecker@adacore.com>
 
+	* python/python-config.py: Resync with Python 2.7 version of this
+	script.
+
+2010-07-08  Joel Brobecker  <brobecker@adacore.com>
+
 	* NEWS: Fix typo in section name (s/GDB 7.1/GDB 7.2).
 
 2010-07-07  Joel Brobecker  <brobecker@adacore.com>
diff --git a/gdb/python/python-config.py b/gdb/python/python-config.py
index 285a227..0230eb4 100644
--- a/gdb/python/python-config.py
+++ b/gdb/python/python-config.py
@@ -1,16 +1,16 @@
 # Program to fetch python compilation parameters.
-# Copied from python-config of the 2.6.5 release.
+# Copied from python-config of the 2.7 release.
 
 import sys
 import os
 import getopt
 from distutils import sysconfig
 
-valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags', 
+valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags',
               'ldflags', 'help']
 
 def exit_with_usage(code=1):
-    print >>sys.stderr, "Usage: %s [%s]" % (sys.argv[0], 
+    print >>sys.stderr, "Usage: %s [%s]" % (sys.argv[0],
                                             '|'.join('--'+opt for opt in valid_opts))
     sys.exit(code)
 
@@ -22,33 +22,36 @@ except getopt.error:
 if not opts:
     exit_with_usage()
 
-opt = opts[0][0]
-
 pyver = sysconfig.get_config_var('VERSION')
 getvar = sysconfig.get_config_var
 
-if opt == '--help':
-    exit_with_usage(0)
-
-elif opt == '--prefix':
-    print sysconfig.PREFIX
-
-elif opt == '--exec-prefix':
-    print sysconfig.EXEC_PREFIX
-
-elif opt in ('--includes', '--cflags'):
-    flags = ['-I' + sysconfig.get_python_inc(),
-             '-I' + sysconfig.get_python_inc(plat_specific=True)]
-    if opt == '--cflags':
-        flags.extend(getvar('CFLAGS').split())
-    print ' '.join(flags)
-
-elif opt in ('--libs', '--ldflags'):
-    libs = getvar('LIBS').split() + getvar('SYSLIBS').split()
-    libs.append('-lpython'+pyver)
-    # add the prefix/lib/pythonX.Y/config dir, but only if there is no
-    # shared library in prefix/lib/.
-    if opt == '--ldflags' and not getvar('Py_ENABLE_SHARED'):
-        libs.insert(0, '-L' + getvar('LIBPL'))
-    print ' '.join(libs)
+opt_flags = [flag for (flag, val) in opts]
+
+if '--help' in opt_flags:
+    exit_with_usage(code=0)
+
+for opt in opt_flags:
+    if opt == '--prefix':
+        print sysconfig.PREFIX
+
+    elif opt == '--exec-prefix':
+        print sysconfig.EXEC_PREFIX
+
+    elif opt in ('--includes', '--cflags'):
+        flags = ['-I' + sysconfig.get_python_inc(),
+                 '-I' + sysconfig.get_python_inc(plat_specific=True)]
+        if opt == '--cflags':
+            flags.extend(getvar('CFLAGS').split())
+        print ' '.join(flags)
+
+    elif opt in ('--libs', '--ldflags'):
+        libs = getvar('LIBS').split() + getvar('SYSLIBS').split()
+        libs.append('-lpython'+pyver)
+        # add the prefix/lib/pythonX.Y/config dir, but only if there is no
+        # shared library in prefix/lib/.
+        if opt == '--ldflags':
+            if not getvar('Py_ENABLE_SHARED'):
+                libs.insert(0, '-L' + getvar('LIBPL'))
+            libs.extend(getvar('LINKFORSHARED').split())
+        print ' '.join(libs)
 
-- 
1.7.1