Hello all, I'm having a problem with a C cross-compiler built on windows using Cygwin. The cross-compiler runs on windows and will cross compile code for a microprocessor. The system builds OK, with exe's generated for the compiler, assembler, and linker. The problem I'm having is the assembler code generated when using the -S option on the compiler. The code is using a forward slash for directory separators and is using relative file names. It generates script like, .file 1 "testFiles/main.c" and for the debug section.. .ascii "testFiles/main.c\000" .ascii "/home/Comp_Owner/Test/gcc\000" What I need for the assembly code is the backward slash, and I need to have absolute path names, like this, .file 1 "C:\\cygwin\\home\\Comp_Owner\\Test\\gcc\\testFiles\\main.c" and for the debug section.. .ascii "C:\\cygwin\\home\\Comp_Owner\\Test\\gcc\\testFiles\\main.c\000" .ascii "C:\\cygwin\\home\\Comp_Owner\\Test\\gcc\000" The debugger I'm using won't work unless the double backslash is used. I tried setting options in the source code used to build the compiler. I added defines shown below in the file 'xm-cygwin.h' in the directory 'src/gcc/config/i386, #define HOST_EXECUTABLE_SUFFIX ".exe" #define HAVE_DOS_BASED_FILE_SYSTEM #define DIR_SEPARATOR_2 '\\' but this didn't help (this may be the wrong file to add the defines). I'm sure there's a simple option to set, but I couldn't find it searching the GCC site. Anyone have any suggestions? Thanks, Joe