do not use 'which' to find binaries, but go through the PATH.

--- Python-2.3.5/Modules/ld_so_aix
+++ Python-2.3.5/Modules/ld_so_aix
@@ -73,7 +73,24 @@
 
 # Check for existence of compiler.
 CC=$1; shift
-whichcc=`which $CC`
+
+pywhich() {
+	save_IFS=${IFS}
+	IFS=:
+	for p in ${PATH}
+	do
+		if test -x "${p}/$1"
+		then
+			echo "${p}/$1"
+			IFS=${save_IFS}
+			return 0
+		fi
+	done
+	IFS=${save_IFS}
+	return 1
+}
+
+whichcc=`pywhich $CC`
 
 if test ! -x "$whichcc"; then
   echo "ld_so_aix: Compiler '$CC' not found; exiting."