I am using gcc package and want to combine C code with assembler. Although I am aware that gcc can in fact assemble code, I am rather set in my ways and am more comfortable assembling code with NASM. So my questions are two: 1) Why would the gcc linker be unable to find a symbol called "readTSC" in an ELF file generated by NASM? I am properly exporting the symbol name, according to the NASM docs. (I also tried exporting it as "_readTSC".) 2) Is the gcc compiler capable of generating an object file in Intel OMF/OBJ format? What command line options are required to invoke this? Thanx for your help.... WaveformDelta