-If you use gcc and g++ version 2.7.x, don't add -O2 to the CXXFLAGS, because
-"g++ -O" generates better code for libcln.a than "g++ -O2".
+ - Linux/x86, gcc-3.x, gcc-4.[0-5].x
+ - Linux/x86_64, gcc-3.[3-4], gcc-4.[0-6].x, clang-2.8
+ - Linux/ia64, gcc-3.[2-4], gcc-4.[0-4].x
+ - Linux/arm, gcc-3.[0-3] (*), gcc-4.[0-4].x (*)
+ - Linux/mips, gcc-3.3, gcc-4.[0-4].x
+ - Linux/sparc, gcc-3.[1-3], gcc-4.[0-2].x
+ - Linux/alpha, gcc-3.[0-3], gcc-4.[0-2].x
+ - Linux/powerpc, gcc-3.[0-3], gcc-4.[0-4].x
+ - Linux/hppa, gcc-4.2.x (*)
+ - Solaris 2.4 (sparc), gcc-3.[1-3], gcc-4.[0-2].x (*)
+ - OSF/1 V4.0 (alpha), gcc-3.1
+ - Irix 6.5, gcc-3.0
+ - OS X Leopard (x86), gcc 4.0.1
+ - Windows/32-bit, MSVC 16.00.30319.01