>>>>> Dipl Ing Eduard Thurner writes: Dipl> Tried to compile and link a 64-bit HelloWorld.c Dipl> with Dipl> - gcc 3.2.1 and Dipl> - binutils 2.13.2 (as, ld) Dipl> and failed during linking: >> gcc -maix64 -o HelloWorld HelloWorld.c Dipl> "collect2: ld returned 1 exit status" Use AIX as and AIX ld, not Binutils on AIX. David