Use python-config to compile with latest Python version.

For OS X systems without Python 2.5, runpython.c does not compile.
Use python-config to get the paths for the latest version.

src/ui-macos/bits/runpython.c

@@ -6,7 +6,7 @@
  * NSApplicationMain() looks for Info.plist using the path in argv[0], which
  * goes wrong if your interpreter is /usr/bin/python.
  */
-#include <Python.h>
+#include <Python/Python.h>
 #include <string.h>
 #include <unistd.h>
 

src/ui-macos/bits/runpython.do

@@ -2,14 +2,19 @@ exec >&2
 redo-ifchange runpython.c
 ARCHES=""
 printf "Platforms: "
-for d in /usr/libexec/gcc/darwin/*; do
+if [ -d /usr/libexec/gcc/darwin ]; then
+    for d in /usr/libexec/gcc/darwin/*; do
         PLAT=$(basename "$d")
         [ "$PLAT" != "ppc64" ] || continue  # fails for some reason on my Mac
         ARCHES="$ARCHES -arch $PLAT"
         printf "$PLAT "
-done
+    done
+fi
 printf "\n"
+PYTHON_LDFLAGS=$(python-config --ldflags)
+PYTHON_INCLUDES=$(python-config --includes)
 gcc $ARCHES \
     -Wall -o $3 runpython.c \
-	-I/usr/include/python2.5 \
-	-lpython2.5
+    $PYTHON_INCLUDES \
+    $PYTHON_LDFLAGS \
+    -framework Python