(svn r1792) Revert r1761 and set fallback values via ?= for CC and CXX as there seem to be platforms (MorphOS) out there which don't provide some proper defaults.

Use gcc and g++ as defaults, because cc and c++ aren't available either. *sigh*

Makefile

@@ -216,6 +216,8 @@ endif
 #
 # Compiler configuration
 #
+CC  ?= gcc
+CXX ?= g++
 
 # Executable file extension
 ifdef WIN32